Tasks not implemented in Applesoft BASIC

A manually generated list of unimplemented tasks as of February 23, 2023

15 puzzle game | 15 puzzle solver | 24 game/Solve | 9 billion names of God the integer

A

Abbreviations, automatic | Abbreviations, easy | Abbreviations, simple | ABC problem | Abelian sandpile model | Abelian sandpile model/Identity | Abstract type | Abundant, deficient and perfect number classifications | Abundant odd numbers | Accumulator factory | Achilles numbers | Active Directory/Connect | Active Directory/Search for a user | Active object | Add a variable to a class instance at runtime | AKS test for primes | Algebraic data types | Align columns | Aliquot sequence classifications | Almkvist-Giullera formula for pi | Almost prime | Amb | Amicable pairs | Anagrams | Anagrams/Deranged anagrams | Angle difference between two bearings | Angles (geometric), normalization and conversion | Anonymous recursion | Anti-primes | Append a record to the end of a text file | Apply a callback to an array | Apply a digital filter (direct form II transposed) | Approximate equality | Arbitrary-precision integers (included) | Arena storage pool | Arithmetic/Complex | Arithmetic derivative | Arithmetic evaluation | Arithmetic-geometric mean | Arithmetic-geometric mean/Calculate Pi | Arithmetic numbers | Arithmetic/Rational | Ascending primes | ASCII art diagram converter | Assertions | Associative array/Creation | Associative array/Iteration | Associative array/Merging | Atomic updates | Attractive numbers | Average loop length | Averages/Mean angle | Averages/Mean time of day | Averages/Mode | Averages/Pythagorean means | Averages/Simple moving average | AVL tree

B

Babylonian spiral | Balanced brackets | Balanced ternary | Base64 decode data | Benford's law | Bernoulli numbers | Best shuffle | Binary search | Bin given limits | Bioinformatics/base count | Bioinformatics/Global alignment | Bioinformatics/Sequence mutation | Biorhythms | Bitcoin/address validation | Bitcoin/public point to address | Bitmap/Bézier curves/Cubic | Bitmap/Bézier curves/Quadratic | Bitmap/Histogram | Bitmap/PPM conversion through a pipe | Bitmap/Read an image through a pipe | Bitmap/Read a PPM file | Bitwise IO | Bitwise operations | Box the compass | Boyer-Moore string search | Brace expansion | Brazilian numbers | Break OO privacy | Brilliant numbers | Bulls and cows/Player | Burrows–Wheeler transform

C

Calendar | Calendar - for "REAL" programmers | Calkin-Wilf sequence | Call a foreign-language function | Call a function | Call a function in a shared library | Call an object method | Camel case and snake case | Canny edge detector | Canonicalize CIDR | Cantor set | Carmichael 3 strong pseudoprimes | Cartesian product of two or more lists | Case-sensitivity of identifiers | Casting out nines | Catalan numbers | Catalan numbers/Pascal's triangle | Catamorphism | Catmull–Clark subdivision surface | Chaocipher | Chat server | Check input device is a terminal | Check Machin-like formulas | Check output device is a terminal | Checkpoint synchronization | Chernick's Carmichael numbers | Cheryl's birthday | Chinese remainder theorem | Chinese zodiac | Cholesky decomposition | Chowla numbers | Church numerals | Circles of given radius through two points | Circular primes | Cistercian numerals | Classes | Closest-pair problem | Closures/Value capture | Collections | Colorful numbers | Color quantization | Colour pinstripe/Display | Colour pinstripe/Printer | Combinations | Combinations and permutations | Combinations with repetitions | Command-line arguments | Comma quibbling | Commatizing numbers | Compare a list of strings | Compare sorting algorithms' performance | Compiler/AST interpreter | Compiler/code generator | Compiler/lexical analyzer | Compiler/syntax analyzer | Compiler/virtual machine interpreter | Compile-time calculation | Composite numbers k with no single digit factors whose factors are all substrings of k | Compound data type | Concurrent computing | Conjugate transpose | Consecutive primes with ascending or descending differences | Constrained genericity | Constrained random points on a circle | Continued fraction | Continued fraction/Arithmetic/Construct from rational number | Convert decimal number to rational | Convex hull | Conway's Game of Life | Cramer's rule | CSV data manipulation | Cuban primes | Cullen and Woodall numbers | Cumulative standard deviation | Currency | Currying | Curzon numbers | CUSIP | Cut a rectangle | Cyclops numbers | Cyclotomic polynomial

D

Damm algorithm | Date format | Date manipulation | Deal cards for FreeCell | Death Star | De Bruijn sequences | Deceptive numbers | Deconvolution/1D | Deconvolution/2D+ | Deepcopy | Define a primitive data type | Delegates | Deming's funnel | Descending primes | Determinant and permanent | Determine if a string has all unique characters | Determine if a string is collapsible | Determine if a string is numeric | Determine if a string is squeezable | Determine if only one instance is running | Determine if two triangles overlap | Determine sentence type | Dice game probabilities | Digital root/Multiplicative digital root | Dinesman's multiple-dwelling problem | Dining philosophers | Disarium numbers | Discordian date | Display a linear combination | Display an outline as a nested table | Distance and Bearing | Distributed programming | Distribution of 0 digits in factorial series | Diversity prediction theorem | DNS query | Documentation | Dominoes | Doomsday rule | Doubly-linked list/Definition | Doubly-linked list/Element definition | Doubly-linked list/Element insertion | Draw a clock | Draw a cuboid | Draw a pixel | Draw a rotating cube | Draw a sphere | Duffinian numbers | Dynamic variable names

D

Earliest difference between prime gaps | Eban numbers | Echo server | Eertree | Egyptian division | EKG sequence convergence | Elementary cellular automaton | Elementary cellular automaton/Infinite length | Elementary cellular automaton/Random number generator | Element-wise operations | Elliptic curve arithmetic | Elliptic Curve Digital Signature Algorithm | Emirp primes | Empty directory | Enforced immutability | Entropy | Entropy/Narcissist | Enumerations | Environment variables | Equal prime and composite sums | Equilibrium index | Erdős-Nicolas numbers | Erdös-Selfridge categorization of primes | Esthetic numbers | Ethiopian multiplication | Euclid-Mullin sequence | Euler's constant 0.5772... | Euler's identity | Euler's sum of powers conjecture | Euler method | Evaluate binomial coefficients | Events | Evolutionary algorithm | Exceptions/Catch an exception thrown in a nested call | Executable library | Execute a Markov algorithm | Execute SNUSP | Exponentiation operator | Extend your language | Extensible prime generator | Extreme floating point values

F

Faces from a mesh | Factorial base numbers indexing permutations of a collection | Factorial primes | Factors of a Mersenne number | Fairshare between two and more | Farey sequence | FASTA format | Fast Fourier transform | Faulhaber's formula | Faulhaber's triangle | Feigenbaum constant calculation | Fermat numbers | Fibonacci n-step number sequences | Fibonacci word | Fibonacci word/fractal | File extension is in extensions list | File modification time | File size | File size distribution | Filter | Find Chess960 starting position identifier | Find common directory path | Find duplicate files | Find if a point is within a triangle | Find largest left truncatable prime in a given base | Find palindromic numbers in both binary and ternary bases | Find the intersection of a line with a plane | Find the last Sunday of each month | Find the missing permutation | First class environments | First-class functions | First-class functions/Use numbers analogously | First perfect square in base n with n unique digits | First power of 2 that has leading decimal digits of 12 | Fivenum | Five weekends | Fixed length records | Flatten a list | Flipping bits game | Flow-control structures | Floyd-Warshall algorithm | Fork | Formal power series | Formatted numeric output | Fortunate numbers | Forward difference | Four is magic | Four is the number of letters in the ... | Fractal tree | Fraction reduction | Fractran | French Republican calendar | FTP | Functional coverage tree | Function frequency | Function prototype | Fusc sequence

G

Galton box animation | Gamma function | Gaussian elimination | Gauss-Jordan matrix inversion | General FizzBuzz | Generate Chess960 starting position | Generate random chess position | Generator/Exponential | Giuga numbers | Globally replace text in several files | Go Fish | Goldbach's comet | Gotchas | Graph colouring | Gray code | Grayscale image | Greatest subsequential sum | Greedy algorithm for Egyptian fractions | Greyscale bars/Display | Guess the number/With feedback (player) | GUI component interaction | GUI enabling/disabling of controls | GUI/Maximum window dimensions

H

Hamming numbers | Handle a signal | Harmonic series | Harshad or Niven series | Hash from two arrays | Hash join | Haversine formula | Hello world/Standard error | Hello world/Web server | Heronian triangles | Hex words | Hickerson series of almost integers | Higher-order functions | Hilbert curve | History variables | Hofstadter-Conway $10,000 sequence | Hofstadter Figure-Figure sequences | Hofstadter Q sequence | Holidays related to Easter | Home primes | Honeycombs | Horizontal sundial calculations | Horner's rule for polynomial evaluation | Hostname | Hough transform | HTTP | HTTPS | HTTPS/Authenticated | HTTPS/Client-authenticated | Huffman coding | Humble numbers | Hunt the Wumpus

I

I'm a software engineer, get me out of here | IBAN | I before E except after C | Idiomatically determine all the characters that can be used for symbols | Idiomatically determine all the lowercase and uppercase letters | Image convolution | Image noise | Imaginary base numbers | Increasing gaps between consecutive Niven numbers | Index finite lists of positive integers | Infinity | Inheritance/Multiple | Inheritance/Single | Intersecting number wheels | Introspection | Inverted index | Inverted syntax | ISBN13 check digit | Isograms and heterograms | Isqrt (integer square root) of X | Iterated digits squaring |

J

Jacobi symbol | Jacobsthal numbers | Jaro similarity | Jaro-Winkler distance | Jensen's Device | Jewels and stones | JortSort | JSON | Juggler sequence | Julia set

K

Kaprekar numbers | K-d tree | Kernighans large earthquake problem | Keyboard macros | K-means++ clustering | Knapsack problem/0-1 | Knapsack problem/Bounded | Knapsack problem/Continuous | Knapsack problem/Unbounded | Knight's tour | Knuth's algorithm S | Knuth's power tree | Koch curve | Kolakoski sequence | Kosaraju | Kronecker product | Kronecker product based fractals

L

Lah numbers | Largest int from concatenated ints | Largest number divisible by its digits | Largest proper divisor of n | Last Friday of each month | Last letter-first letter | Latin Squares in reduced form | Latin Squares in reduced form/Randomizing using Jacobson and Matthews’ Technique | Law of cosines - triples | Left factorials | Legendre prime counting function | Leonardo numbers | Levenshtein distance | Levenshtein distance/Alignment | Linear congruential generator | List comprehensions | List rooted trees | Literals/Integer | Logical operations | Logistic curve fitting in epidemiology | Longest common subsequence | Longest increasing subsequence | Longest string challenge | Long literals, with continuations | Long primes | Look-and-say sequence | Loop over multiple arrays simultaneously | Loops/Foreach | Loops/Increment loop index within loop body | Lucas-Lehmer test | Lucky and even lucky numbers | LU decomposition | Ludic numbers | Luhn test of credit card numbers | Lychrel numbers | LZW compression

M

MAC vendor lookup | Magic constant | Magic squares of doubly even order | Magic squares of singly even order | Magnanimous numbers | Main step of GOST 28147-89 | Make directory path | Man or boy test | Map range | Mastermind | Matrix chain multiplication | Matrix digital rain | Matrix-exponentiation operator | Matrix transposition | Maximum triangle path sum | Mayan calendar | Mayan numerals | Maze generation | Maze solving | McNuggets problem | MD4 | MD5 | MD5/Implementation | Median filter | Meissel–Mertens constant | Memory allocation | Memory layout of a data structure | Merge and aggregate datasets | Mertens function | Metallic ratios | Metaprogramming | Metered concurrency | Metronome | Mian-Chowla sequence | Miller–Rabin primality test | Mind boggling card trick | Minesweeper game | Minimal steps down to 1 | Minimum multiple of m where digital sum equals m | Minimum positive multiple in base 10 using only 0 and 1 | Minkowski question-mark function | Möbius function | Modified random distribution | Modular arithmetic | Modular exponentiation | Modular inverse | Monads/List monad | Monads/Maybe monad | Monads/Writer monad | Monte Carlo methods | Monty Hall problem | Morse code | Motzkin numbers | Mouse position | Move-to-front algorithm | Multi-base primes | Multi-dimensional array | Multifactorial | Multiple distinct objects | Multiple regression | Multiplicative order | Multisplit | Munchausen numbers | Musical scale | Mutex | Mutual recursion

N

Naming conventions | Narcissist | Narcissistic decimal number | Natural sorting | Nautical bell | Negative base numbers | Nested function | Nested templated data | Next highest int from digits | Non-continuous subsequences | Non-decimal radices/Convert | Non-decimal radices/Input | Non-decimal radices/Output | Nonoblock | Nonogram solver | Non-transitive dice | N-queens problem | N-smooth numbers | Nth root | Numbers which are not the sum of distinct squares | Numbers which are the cube roots of the product of their proper divisors | Numbers with equal rises and falls | Numerical and alphabetical suffixes | Numerical integration | Numerical integration/Gauss-Legendre Quadrature | Numeric error propagation

O

Object serialization | Odd word problem | Old Russian measure of length | OLE automation | One-dimensional cellular automata | One-time pad | OpenGL | OpenWebNet password | Operator precedence | Optional parameters | Order by pair comparisons | Order disjoint list items | Ordered partitions | Ordered words | Order two numerical lists

P

P-Adic numbers, basic | P-Adic square roots | Padovan n-step number sequences | Padovan sequence | Palindrome dates | Palindromic gapful numbers | Pancake numbers | Paraffins | Parallel brute force | Parallel calculations | Parameterized SQL statement | Parametric polymorphism | Parse an IP Address | Parsing/RPN calculator algorithm | Parsing/RPN to infix conversion | Parsing/Shunting-yard algorithm | Partial function application | Particle fountain | Partition an integer x into n primes | Partition function P | Pascal's triangle | Pascal's triangle/Puzzle | Pascal matrix generation | Pathological floating point problems | Peaceful chess queen armies | Peano curve | Pell's equation | Pell numbers | Pentomino tiling | Percentage difference between images | Percolation/Bond percolation | Percolation/Mean cluster density | Percolation/Mean run density | Percolation/Site percolation | Perfect numbers | Perfect shuffle | Perfect totient numbers | Peripheral drift illusion | Perlin noise | Permutations | Permutations by swapping | Permutations/Derangements | Permutations/Rank of a permutation | Permutation test | Pernicious numbers | Phrase reversals | Pi | Pierpont primes | Pig the dice game | Pig the dice game/Player | Pinstripe/Display | Pinstripe/Printer | Pisano period | Plasma effect | Playfair cipher | Playing cards | Play recorded sounds | Plot coordinate pairs | Pointers and references | Poker hand analyser | Polymorphic copy | Polymorphism | Polynomial long division | Polynomial regression | Polyspiral | Population count | Power set | Pragmatic directives | Price fraction | Primality by trial division | Primality by Wilson's theorem | Prime conspiracy | Primes - allocate descendants to their ancestors | Prime triangle | Primorial numbers | Priority queue | Probabilistic choice | Problem of Apollonius | Proper divisors | Pseudo-random numbers/Combined recursive generator MRG32k3a | Pseudo-random numbers/Middle-square method | Pseudo-random numbers/PCG32 | Pseudo-random numbers/Splitmix64 | Pseudo-random numbers/Xorshift star | P-value correction | Pythagoras tree | Pythagorean quadruples | Pythagorean triples

Q

QR decomposition | Quaternion type | Queue/Usage | Quickselect algorithm

R

Ramanujan's constant | Ramanujan primes/twins | Ramer-Douglas-Peucker line simplification | Random Latin squares | Random number generator (device) | Random number generator (included) | Random sentence from book | Range consolidation | Range expansion | Range extraction | Ranking methods | Rare numbers | Rate counter | Ray-casting algorithm | RCRPG | Read a configuration file | Read a file character by character/UTF8 | Read a file line by line | Read a specific line from a file | Real constants and functions | Recaman's sequence | Record sound | Reduced row echelon form | Reflection/Get source | Reflection/List methods | Reflection/List properties | Regular expressions | Remove lines from a file | Rendezvous | Rep-string | Repunit primes | Resistor mesh | Respond to an unknown method call | Retrieve and search chat history | Return multiple values | Rhonda numbers | RIPEMD-160 | Rock-paper-scissors | Roots of a function | Roots of a quadratic function | Roots of unity | Rosetta Code/Count examples | Rosetta Code/Find bare lang tags | Rosetta Code/Find unimplemented tasks | Rosetta Code/Fix code tags | Rosetta Code/Rank languages by number of users | Rosetta Code/Rank languages by popularity | RPG attributes generator | RSA code | Runge-Kutta method | Run-length encoding | Runtime evaluation | Runtime evaluation/In an environment | Ruth-Aaron numbers

S

Safe addition | Safe primes and unsafe primes | Sailors, coconuts and a monkey problem | Same fringe | Scope/Function names and labels | Search a list | Search a list of records | Search in paragraph's text | Secure temporary file | SEDOLs | Selectively replace multiple instances of a character within a string | Self-describing numbers | Self numbers | Semiprime | Semordnilap | Send an unknown method call | Send email | Sequence: nth number with exactly n divisors | Sequence of non-squares | Sequence of primes by trial division | Sequence of primorial primes | Sequence: smallest number greater than previous term with exactly n divisors | Sequence: smallest number with exactly n divisors | Set | Set consolidation | Set of real numbers | Set puzzle | Set right-adjacent bits | Seven-sided dice from five-sided dice | S-expressions | Sexy primes | SHA-1 | SHA-256 | SHA-256 Merkle tree | Shell one-liner | Shoelace formula for polygonal area | Short-circuit evaluation | Shortest common supersequence | Show the epoch | Sierpinski arrowhead curve | Sierpinski pentagon | Sierpinski square curve | Sierpinski triangle | Sierpinski triangle/Graphical | Sieve of Pritchard | Simple database | Simple turtle graphics | Simple windowed application | Simulate input/Mouse | Singleton | Singly-linked list/Element definition | Singly-linked list/Element insertion | Singly-linked list/Traversal | Singular value decomposition | Sleeping Beauty problem | Smallest number k such that k+2^m is composite for all m less than k | Smarandache prime-digital sequence | Smith numbers | Snake | SOAP | Sockets | Sokoban | Solve a Hidato puzzle | Solve a Holy Knight's tour | Solve a Hopido puzzle | Solve a Numbrix puzzle | Solve the no connection puzzle | Sort a list of object identifiers | Sort an array of composite structures | Sort an integer array | Sort an outline at every level | Sort disjoint sublist | Sorting algorithms/Bead sort | Sorting algorithms/Bogosort | Sorting Algorithms/Circle Sort | Sorting algorithms/Cocktail sort | Sorting algorithms/Cocktail sort with shifting bounds | Sorting algorithms/Comb sort | Sorting algorithms/Counting sort | Sorting algorithms/Gnome sort | Sorting algorithms/Heapsort | Sorting algorithms/Insertion sort | Sorting algorithms/Merge sort | Sorting algorithms/Pancake sort | Sorting algorithms/Patience sort | Sorting algorithms/Permutation sort | Sorting algorithms/Quicksort | Sorting algorithms/Radix sort | Sorting algorithms/Selection sort | Sorting algorithms/Shell sort | Sorting algorithms/Sleep sort | Sorting algorithms/Stooge sort | Sorting algorithms/Strand sort | Sort numbers lexicographically | Sort stability | Sort three variables | Sort using a custom comparator | Soundex | Sparkline in unicode | Special characters | Special variables | Speech synthesis | Spelling of ordinal numbers | Sphenic numbers | Spinning rod animation/Text | Spiral matrix | Split a character string based on change of character | SQL-based authentication | Square but not cube | Square form factorization | Square-free integers | Stable marriage problem | Stack traces | Stair-climbing puzzle | Start from a main routine | State name puzzle | Statistics/Basic | Statistics/Normal distribution | Stem-and-leaf plot | Stern-Brocot sequence | Stirling numbers of the first kind | Stirling numbers of the second kind | Straddling checkerboard | Strassen's algorithm | Stream merge | String interpolation (included) | Strip block comments | Strip control codes and extended characters from a string | Strip whitespace from a string/Top and tail | Strong and weak primes | Subleq | Substitution cipher | Substring/Top and tail | Subtractive generator | Successive prime differences | Sudan function | Sudoku | Suffixation of decimal numbers | Sum and product puzzle | Summarize and say sequence | Summarize primes | Sum of a series | Sum of elements below main diagonal of matrix | Sum of squares | Sum to 100 | Super-d numbers | Superellipse | Superpermutation minimisation | Sutherland-Hodgman polygon clipping | Sylvester's sequence | Symmetric difference | Synchronous concurrency | System time

T

Table creation/Postal addresses | Take notes on the command line | Tarjan | Tau function | Tau number | Taxicab numbers | Teacup rim text | Temperature conversion | Terminal control/Coloured text | Terminal control/Unicode output | Ternary logic | Test a function | Test integerness | Textonyms | Text processing/1 | Text processing/2 | Text processing/Max licenses in use | The Name Game | The sieve of Sundaram | The Twelve Days of Christmas | Thiele's interpolation formula | Thue-Morse | Tic-tac-toe | Time a function | Tokenize a string with escaping | Tonelli-Shanks algorithm | Topic variable | Topological sort | Top rank per group | Topswops | Total circles area | Totient function | Towers of Hanoi | Trabb Pardo–Knuth algorithm | Tree datastructures | Tree from nesting levels | Tree traversal | Tropical algebra overloading | Truncatable primes | Truncate a file | Truth table | Twelve statements | Two's complement | Two bullet roulette

U

Ukkonen’s suffix tree construction | Ulam spiral (for primes) | Ultra useful primes | Unbias a random generator | Undefined values | Unicode strings | Unicode variable names | Universal Turing machine | Unix/ls | Unprimeable numbers | Untouchable numbers | UPC | Update a configuration file | URL decoding | URL parser | Use another language to call a function | User input/Graphical | UTF-8 encode and decode

V

Validate International Securities Identification Number | Vampire number | Van der Corput sequence | Van Eck sequence | Variable declaration reset | Variable-length quantity | Vector | Vector products | Verhoeff algorithm | Verify distribution uniformity/Chi-squared test | Verify distribution uniformity/Naive | Vigenère cipher/Cryptanalysis | Visualize a tree | Vogel's approximation method | Voronoi diagram

W

Wagstaff primes | Walk a directory/Non-recursively | Walk a directory/Recursively | War card game | Water collected between towers | Web scraping | Weird numbers | Wieferich primes | Wilson primes of order n | Window creation | Window creation/X11 | Window management | Wireworld | Word frequency | Wordiff | Word ladder | Word search | Word wheel | Word wrap | World Cup group stage | Write to Windows event log

X

Xiaolin Wu's line algorithm | XML/DOM serialization | XML/Input | XML/XPath

Y

Yahoo! search interface | Y combinator | Yellowstone sequence

Z

Zebra puzzle | Zeckendorf arithmetic | Zeckendorf number representation | Zhang-Suen thinning algorithm | Zumkeller numbers

end of the manually generated list of unimplemented tasks

Automatically Generated: This result set should be accurate to within fifteen minutes of the last viewing.

Awareness

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Tasks not implemented in Applesoft_BASIC

1

• 15 puzzle solver

2

• 24 game/Solve

9

• 9 billion names of God the integer

A

• ABC problem
• ADFGVX cipher
• AKS test for primes
• ASCII art diagram converter
• AVL tree
• Abbreviations, automatic
• Abbreviations, easy
• Abbreviations, simple
• Abelian sandpile model
• Abelian sandpile model/Identity
• Abundant odd numbers
• Abundant, deficient and perfect number classifications
• Accumulator factory
• Achilles numbers
• Active Directory/Connect
• Active Directory/Search for a user
• Active object
• Algebraic data types
• Align columns
• Aliquot sequence classifications
• Almkvist-Giullera formula for pi
• Almost prime
• Amb
• Amicable pairs
• Anadromes
• Anagram generator
• Anagrams
• Anagrams/Deranged anagrams
• Angle difference between two bearings
• Angles (geometric), normalization and conversion
• Anonymous recursion
• Anti-primes
• Append a record to the end of a text file
• Apply a callback to an array
• Apply a digital filter (direct form II transposed)
• Approximate equality
• Arbitrary-precision integers (included)
• Arena storage pool
• Arithmetic derivative
• Arithmetic evaluation
• Arithmetic numbers
• Arithmetic-geometric mean/Calculate Pi
• Arithmetic/Complex
• Arithmetic/Rational
• Ascending primes
• Assertions
• Associative array/Merging
• Atomic updates
• Attractive numbers
• Average loop length
• Averages/Mean angle
• Averages/Mean time of day
• Averages/Mode
• Averages/Pythagorean means
• Averages/Simple moving average

B

• Babylonian spiral
• Balanced ternary
• Base64 decode data
• Benford's law
• Bernoulli numbers
• Bernstein basis polynomials
• Best shuffle
• Bin given limits
• Bioinformatics/Global alignment
• Bioinformatics/Sequence mutation
• Bioinformatics/base count
• Biorhythms
• Bitcoin/address validation
• Bitcoin/public point to address
• Bitmap/Bézier curves/Cubic
• Bitmap/Bézier curves/Quadratic
• Bitmap/Histogram
• Bitmap/PPM conversion through a pipe
• Bitmap/Read a PPM file
• Bitmap/Read an image through a pipe
• Bitwise IO
• Bitwise operations
• Blum integer
• Boustrophedon transform
• Box the compass
• Boyer-Moore string search
• Brace expansion
• Brazilian numbers
• Break OO privacy
• Brilliant numbers
• Bulls and cows/Player
• Burrows–Wheeler transform
• Bézier curves/Intersections

C

• CSV data manipulation
• CUSIP
• Calendar
• Calendar - for "REAL" programmers
• Calkin-Wilf sequence
• Call a foreign-language function
• Call a function
• Call a function in a shared library
• Call an object method
• Camel case and snake case
• Canny edge detector
• Canonicalize CIDR
• Cantor set
• Carmichael 3 strong pseudoprimes
• Casting out nines
• Catamorphism
• Catmull–Clark subdivision surface
• Centre and radius of a circle passing through 3 points in a plane
• Chaocipher
• Chat server
• Check Machin-like formulas
• Check if a polygon overlaps with a rectangle
• Check if two polygons overlap
• Check input device is a terminal
• Check output device is a terminal
• Checkpoint synchronization
• Chernick's Carmichael numbers
• Cheryl's birthday
• Chinese remainder theorem
• Chinese zodiac
• Cholesky decomposition
• Chowla numbers
• Church numerals
• Circles of given radius through two points
• Circular primes
• Cistercian numerals
• Classes
• Closest-pair problem
• Closures/Value capture
• Collections
• Color quantization
• Colorful numbers
• Colour pinstripe/Display
• Colour pinstripe/Printer
• Combinations
• Combinations and permutations
• Combinations with repetitions
• Comma quibbling
• Command-line arguments
• Commatizing numbers
• Compare a list of strings
• Compare sorting algorithms' performance
• Compile-time calculation
• Compiler/AST interpreter
• Compiler/code generator
• Compiler/lexical analyzer
• Compiler/syntax analyzer
• Compiler/virtual machine interpreter
• Composite numbers k with no single digit factors whose factors are all substrings of k
• Compound data type
• Concurrent computing
• Conjugate transpose
• Consecutive primes with ascending or descending differences
• Constrained genericity
• Constrained random points on a circle
• Continued fraction
• Continued fraction/Arithmetic/Construct from rational number
• Continued fraction/Arithmetic/G(matrix ng, continued fraction n)
• Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)
• Convert decimal number to rational
• Convex hull
• Conway's Game of Life
• Cramer's rule
• Cuban primes
• Cumulative standard deviation
• Currency
• Currying
• Curzon numbers
• Cut a rectangle
• Cycles of a permutation
• Cyclops numbers
• Cyclotomic polynomial

D

• DNS query
• Damm algorithm
• Date format
• Date manipulation
• De Bruijn sequences
• De Polignac numbers
• Deal cards for FreeCell
• Death Star
• Deceptive numbers
• Deconvolution/1D
• Deconvolution/2D+
• Decorate-sort-undecorate idiom
• Deepcopy
• Define a primitive data type
• Delegates
• Deming's funnel
• Descending primes
• Determinant and permanent
• Determine if a string has all unique characters
• Determine if a string is collapsible
• Determine if a string is numeric
• Determine if a string is squeezable
• Determine if only one instance is running
• Determine if two triangles overlap
• Determine sentence type
• Dice game probabilities
• Digital root/Multiplicative digital root
• Dinesman's multiple-dwelling problem
• Dining philosophers
• Disarium numbers
• Discordian date
• Display an outline as a nested table
• Distance and Bearing
• Distributed programming
• Distribution of 0 digits in factorial series
• Diversity prediction theorem
• Documentation
• Dominoes
• Doomsday rule
• Doubly-linked list/Definition
• Doubly-linked list/Element definition
• Doubly-linked list/Element insertion
• Draw a clock
• Draw a cuboid
• Draw a rotating cube
• Draw a sphere
• Dynamic variable names

E

• EKG sequence convergence
• Earliest difference between prime gaps
• Eban numbers
• Echo server
• Eertree
• Element-wise operations
• Elementary cellular automaton
• Elementary cellular automaton/Infinite length
• Elementary cellular automaton/Random number generator
• Elliptic Curve Digital Signature Algorithm
• Elliptic curve arithmetic
• Emirp primes
• Empty directory
• Enforced immutability
• Entropy
• Entropy/Narcissist
• Enumerations
• Environment variables
• Equal prime and composite sums
• Equilibrium index
• Erdös-Selfridge categorization of primes
• Erdős-Nicolas numbers
• Esthetic numbers
• Euclid-Mullin sequence
• Euclidean rhythm
• Euler's constant 0.5772...
• Euler's identity
• Euler's sum of powers conjecture
• Evaluate binomial coefficients
• Events
• Evolutionary algorithm
• Exceptions/Catch an exception thrown in a nested call
• Executable library
• Execute SNUSP
• Execute a Markov algorithm
• Exponentiation operator
• Extend your language
• Extensible prime generator
• Extreme floating point values

F

• FASTA format
• FTP
• Faces from a mesh
• Factorial base numbers indexing permutations of a collection
• Factorial primes
• Factorize string into Lyndon words
• Factors of a Mersenne number
• Fairshare between two and more
• Farey sequence
• Fast Fourier transform
• Faulhaber's formula
• Faulhaber's triangle
• Feigenbaum constant calculation
• Fermat numbers
• Fermat pseudoprimes
• Fibonacci n-step number sequences
• Fibonacci word
• Fibonacci word/fractal
• File extension is in extensions list
• File modification time
• File size
• File size distribution
• Filter
• Find Chess960 starting position identifier
• Find common directory path
• Find duplicate files
• Find if a point is within a triangle
• Find largest left truncatable prime in a given base
• Find palindromic numbers in both binary and ternary bases
• Find the intersection of a line with a plane
• Find the last Sunday of each month
• Find the missing permutation
• First class environments
• First perfect square in base n with n unique digits
• First power of 2 that has leading decimal digits of 12
• First-class functions
• First-class functions/Use numbers analogously
• Five weekends
• Fivenum
• Fixed length records
• Flatten a list
• Flipping bits game
• Flow-control structures
• Floyd-Warshall algorithm
• Fork
• Formal power series
• Formatted numeric output
• Fortunate numbers
• Forward difference
• Four is magic
• Four is the number of letters in the ...
• Fractal tree
• Fraction reduction
• Fractran
• French Republican calendar
• Function frequency
• Function prototype
• Functional coverage tree
• Fusc sequence

G

• GSTrans string conversion
• GUI/Maximum window dimensions
• Galton box animation
• Gamma function
• Gauss-Jordan matrix inversion
• Gaussian elimination
• Gaussian primes
• General FizzBuzz
• Generate Chess960 starting position
• Generate random chess position
• Generator/Exponential
• Giuga numbers
• Globally replace text in several files
• Go Fish
• Goldbach's comet
• Gotchas
• Graph colouring
• Gray code
• Grayscale image
• Greatest prime dividing the n-th cubefree number
• Greatest subsequential sum
• Greedy algorithm for Egyptian fractions
• Greyscale bars/Display
• Guess the number/With feedback (player)

H

• HTTPS/Authenticated
• HTTPS/Client-authenticated
• Hamming numbers
• Handle a signal
• Harshad or Niven series
• Hash from two arrays
• Hash join
• Hashtron inference
• Hello world/Web server
• Heronian triangles
• Hex words
• Hickerson series of almost integers
• Higher-order functions
• Hilbert curve
• History variables
• Hofstadter Figure-Figure sequences
• Hofstadter Q sequence
• Hofstadter-Conway $10,000 sequence
• Holidays related to Easter
• Home primes
• Honaker primes
• Honeycombs
• Horizontal sundial calculations
• Hostname
• Hough transform
• Huffman coding
• Humble numbers
• Hunt the Wumpus

I

• I before E except after C
• I'm a software engineer, get me out of here
• IBAN
• ISBN13 check digit
• Idiomatically determine all the characters that can be used for symbols
• Idoneal numbers
• Image convolution
• Image noise
• Imaginary base numbers
• Inconsummate numbers in base 10
• Increasing gaps between consecutive Niven numbers
• Index finite lists of positive integers
• Infinity
• Inheritance/Multiple
• Inheritance/Single
• Intersecting number wheels
• Introspection
• Inverted index
• Inverted syntax
• Isograms and heterograms
• Isqrt (integer square root) of X
• Iterated digits squaring

J

• JSON
• Jacobi symbol
• Jacobsthal numbers
• Jaro similarity
• Jaro-Winkler distance
• Jewels and stones
• Jordan-Pólya numbers
• JortSort
• Juggler sequence
• Julia set

K

• K-d tree
• K-means++ clustering
• Kaprekar numbers
• Kernighans large earthquake problem
• Keyboard macros
• Klarner-Rado sequence
• Knapsack problem/0-1
• Knapsack problem/Bounded
• Knapsack problem/Continuous
• Knapsack problem/Unbounded
• Knight's tour
• Knuth's algorithm S
• Knuth's power tree
• Koch curve
• Kolakoski sequence
• Kosaraju
• Kronecker product
• Kronecker product based fractals

L

• LU decomposition
• Lah numbers
• Largest int from concatenated ints
• Largest number divisible by its digits
• Last Friday of each month
• Last letter-first letter
• Latin Squares in reduced form
• Law of cosines - triples
• Left factorials
• Legendre prime counting function
• Leonardo numbers
• Levenshtein distance
• Levenshtein distance/Alignment
• Linear congruential generator
• List comprehensions
• List rooted trees
• Literals/Integer
• Logical operations
• Logistic curve fitting in epidemiology
• Long literals, with continuations
• Long primes
• Longest common subsequence
• Longest increasing subsequence
• Loops/Foreach
• Loops/Increment loop index within loop body
• Lucas-Lehmer test
• Lucky and even lucky numbers
• Ludic numbers
• Luhn test of credit card numbers
• Lychrel numbers
• Lyndon word

M

• MAC vendor lookup
• MD4
• MD5
• MD5/Implementation
• Magic constant
• Magic squares of doubly even order
• Magic squares of singly even order
• Magnanimous numbers
• Main step of GOST 28147-89
• Make directory path
• Man or boy test
• Map range
• Mastermind
• Matrix chain multiplication
• Matrix digital rain
• Matrix transposition
• Matrix-exponentiation operator
• Mayan calendar
• Mayan numerals
• Maze generation
• Maze solving
• Median filter
• Meissel–Mertens constant
• Memory allocation
• Memory layout of a data structure
• Merge and aggregate datasets
• Mertens function
• Metallic ratios
• Metaprogramming
• Metered concurrency
• Metronome
• Mian-Chowla sequence
• Miller–Rabin primality test
• Mind boggling card trick
• Minesweeper game
• Minimal steps down to 1
• Minimum multiple of m where digital sum equals m
• Minimum positive multiple in base 10 using only 0 and 1
• Minkowski question-mark function
• Modified random distribution
• Modular arithmetic
• Modular exponentiation
• Modular inverse
• Monads/List monad
• Monads/Maybe monad
• Monads/Writer monad
• Monte Carlo methods
• Monty Hall problem
• Morse code
• Motzkin numbers
• Mouse position
• Move-to-front algorithm
• Multi-base primes
• Multi-dimensional array
• Multifactorial
• Multiple distinct objects
• Multiple regression
• Multiplicative order
• Multisplit
• Munchausen numbers
• Musical scale
• Mutex
• Mutual recursion

N

• N-smooth numbers
• Naming conventions
• Narcissist
• Narcissistic decimal number
• Natural sorting
• Nautical bell
• Negative base numbers
• Nested function
• Next highest int from digits
• Non-continuous subsequences
• Non-decimal radices/Convert
• Non-decimal radices/Input
• Non-decimal radices/Output
• Non-transitive dice
• Nonoblock
• Nonogram solver
• Nth root
• Numbers k such that the last letter of k is the same as the first letter of k+1
• Numbers which are not the sum of distinct squares
• Numbers which are the cube roots of the product of their proper divisors
• Numbers with equal rises and falls
• Numeric error propagation
• Numerical and alphabetical suffixes
• Numerical integration
• Numerical integration/Gauss-Legendre Quadrature

O

• O'Halloran numbers
• OLE automation
• Object serialization
• Odd word problem
• Old Russian measure of length
• One-time pad
• OpenGL
• OpenWebNet password
• Operator precedence
• Optional parameters
• Order by pair comparisons
• Order disjoint list items
• Order two numerical lists
• Ordered partitions
• Ordered words
• Ormiston triples
• Own digits power sum

P

• P-Adic numbers, basic
• P-Adic square roots
• P-value correction
• Padovan n-step number sequences
• Padovan sequence
• Pairs with common factors
• Palindrome dates
• Palindromic gapful numbers
• Pan base non-primes
• Paraffins
• Parallel brute force
• Parallel calculations
• Parameterized SQL statement
• Parametric polymorphism
• Parse an IP Address
• Parsing/RPN calculator algorithm
• Parsing/RPN to infix conversion
• Parsing/Shunting-yard algorithm
• Partial function application
• Particle fountain
• Partition an integer x into n primes
• Partition function P
• Pascal matrix generation
• Pascal's triangle
• Pascal's triangle/Puzzle
• Pathological floating point problems
• Peaceful chess queen armies
• Peano curve
• Pell numbers
• Pell's equation
• Penta-power prime seeds
• Pentomino tiling
• Percentage difference between images
• Percolation/Bond percolation
• Percolation/Mean cluster density
• Percolation/Mean run density
• Percolation/Site percolation
• Perfect numbers
• Perfect shuffle
• Peripheral drift illusion
• Perlin noise
• Permutation test
• Permutations by swapping
• Permutations/Derangements
• Permutations/Rank of a permutation
• Pernicious numbers
• Pierpont primes
• Pig the dice game/Player
• Pinstripe/Display
• Pinstripe/Printer
• Pisano period
• Plasma effect
• Playfair cipher
• Playing cards
• Plot coordinate pairs
• Pointers and references
• Poker hand analyser
• Polymorphic copy
• Polymorphism
• Polynomial long division
• Polynomial regression
• Polyspiral
• Population count
• Power set
• Pragmatic directives
• Price fraction
• Prime conspiracy
• Prime numbers whose neighboring pairs are tetraprimes
• Prime triangle
• Primes - allocate descendants to their ancestors
• Primes: n*2^m+1
• Primorial numbers
• Priority queue
• Probabilistic choice
• Problem of Apollonius
• Product of min and max prime factors
• Proper divisors
• Pseudo-random numbers/Combined recursive generator MRG32k3a
• Pseudo-random numbers/Middle-square method
• Pseudo-random numbers/PCG32
• Pseudo-random numbers/Splitmix64
• Pseudo-random numbers/Xorshift star
• Pythagoras tree
• Pythagorean quadruples
• Pythagorean triples

Q

• QR decomposition
• Quad-power prime seeds
• Quaternion type
• Queue/Usage
• Quickselect algorithm

R

• RCRPG
• RIPEMD-160
• RPG attributes generator
• RSA code
• Radical of an integer
• Ramanujan primes/twins
• Ramanujan's constant
• Ramer-Douglas-Peucker line simplification
• Random Latin squares
• Random number generator (device)
• Random number generator (included)
• Random sentence from book
• Range consolidation
• Range expansion
• Range extraction
• Ranking methods
• Rare numbers
• Rate counter
• Ray-casting algorithm
• Read a configuration file
• Read a file character by character/UTF8
• Read a file line by line
• Read a specific line from a file
• Record sound
• Reduced row echelon form
• Reflection/Get source
• Reflection/List methods
• Reflection/List properties
• Regular expressions
• Remove lines from a file
• Rendezvous
• Rep-string
• Repunit primes
• Resistor mesh
• Respond to an unknown method call
• Retrieve and search chat history
• Return multiple values
• Rhonda numbers
• Riordan numbers
• Rock-paper-scissors
• Roots of a function
• Roots of a quadratic function
• Roots of unity
• Rosetta Code/Count examples
• Rosetta Code/Find bare lang tags
• Rosetta Code/Find unimplemented tasks
• Rosetta Code/Fix code tags
• Rosetta Code/Rank languages by number of users
• Rosetta Code/Rank languages by popularity
• Round-robin tournament schedule
• Runge-Kutta method
• Runtime evaluation
• Runtime evaluation/In an environment
• Ruth-Aaron numbers

S

• S-expressions
• SEDOLs
• SHA-1
• SHA-256
• SHA-256 Merkle tree
• SOAP
• SQL-based authentication
• Safe addition
• Safe primes and unsafe primes
• Sailors, coconuts and a monkey problem
• Same fringe
• Scope/Function names and labels
• Search a list
• Search a list of records
• Search in paragraph's text
• Secure temporary file
• Selectively replace multiple instances of a character within a string
• Self numbers
• Self-describing numbers
• Semiprime
• Semordnilap
• Send an unknown method call
• Send email
• Sequence of non-squares
• Sequence of primes by trial division
• Sequence of primorial primes
• Sequence: nth number with exactly n divisors
• Sequence: smallest number greater than previous term with exactly n divisors
• Sequence: smallest number with exactly n divisors
• Set
• Set consolidation
• Set of real numbers
• Set puzzle
• Set right-adjacent bits
• Set, the card game
• Seven-sided dice from five-sided dice
• Sexy primes
• Shell one-liner
• Shoelace formula for polygonal area
• Short-circuit evaluation
• Shortest common supersequence
• Show the epoch
• Sierpinski arrowhead curve
• Sierpinski pentagon
• Sierpinski square curve
• Sierpinski triangle
• Sierpinski triangle/Graphical
• Sieve of Pritchard
• Simple turtle graphics
• Simple windowed application
• Simulate input/Mouse
• Singleton
• Singly-linked list/Element definition
• Singly-linked list/Element insertion
• Singly-linked list/Traversal
• Singular value decomposition
• Sisyphus sequence
• Sleeping Beauty problem
• Smallest number k such that k+2^m is composite for all m less than k
• Smarandache prime-digital sequence
• Smarandache-Wellin primes
• Smith numbers
• Sokoban
• Solve a Hidato puzzle
• Solve a Holy Knight's tour
• Solve a Hopido puzzle
• Solve a Numbrix puzzle
• Solve the no connection puzzle
• Sorensen–Dice coefficient
• Sort a list of object identifiers
• Sort an array of composite structures
• Sort an integer array
• Sort an outline at every level
• Sort numbers lexicographically
• Sort stability
• Sort three variables
• Sort using a custom comparator
• Sorting Algorithms/Circle Sort
• Sorting algorithms/Bead sort
• Sorting algorithms/Bogosort
• Sorting algorithms/Cocktail sort
• Sorting algorithms/Cocktail sort with shifting bounds
• Sorting algorithms/Comb sort
• Sorting algorithms/Counting sort
• Sorting algorithms/Gnome sort
• Sorting algorithms/Heapsort
• Sorting algorithms/Insertion sort
• Sorting algorithms/Merge sort
• Sorting algorithms/Pancake sort
• Sorting algorithms/Patience sort
• Sorting algorithms/Permutation sort
• Sorting algorithms/Quicksort
• Sorting algorithms/Radix sort
• Sorting algorithms/Selection sort
• Sorting algorithms/Shell sort
• Sorting algorithms/Sleep sort
• Sorting algorithms/Stooge sort
• Sorting algorithms/Strand sort
• Soundex
• Sparkline in unicode
• Special characters
• Special variables
• Speech synthesis
• Spelling of ordinal numbers
• Sphenic numbers
• Spinning rod animation/Text
• Spiral matrix
• Split a character string based on change of character
• Square but not cube
• Square form factorization
• Square-free integers
• Stable marriage problem
• Stack traces
• Stair-climbing puzzle
• Start from a main routine
• State name puzzle
• Statistics/Normal distribution
• Steffensen's method
• Stem-and-leaf plot
• Stern-Brocot sequence
• Stirling numbers of the first kind
• Stirling numbers of the second kind
• Straddling checkerboard
• Strassen's algorithm
• Stream merge
• Strip block comments
• Strip control codes and extended characters from a string
• Strip whitespace from a string/Top and tail
• Strong and weak primes
• Sub-unit squares
• Subleq
• Substitution cipher
• Subtractive generator
• Successive prime differences
• Sudan function
• Sudoku
• Suffixation of decimal numbers
• Sum and product puzzle
• Sum of a series
• Sum of elements below main diagonal of matrix
• Sum of squares
• Sum to 100
• Summarize and say sequence
• Summarize primes
• Super-Poulet numbers
• Super-d numbers
• Superellipse
• Superpermutation minimisation
• Sutherland-Hodgman polygon clipping
• Sylvester's sequence
• Symmetric difference
• Synchronous concurrency
• System time

T

• Table creation/Postal addresses
• Take notes on the command line
• Tarjan
• Tau function
• Taxicab numbers
• Teacup rim text
• Terminal control/Coloured text
• Terminal control/Unicode output
• Ternary logic
• Test a function
• Test integerness
• Text processing/1
• Text processing/2
• Text processing/Max licenses in use
• Textonyms
• The Name Game
• The sieve of Sundaram
• Thiele's interpolation formula
• Thue-Morse
• Tic-tac-toe
• Time a function
• Tokenize a string with escaping
• Tonelli-Shanks algorithm
• Top rank per group
• Topic variable
• Topological sort
• Topswops
• Total circles area
• Totient function
• Towers of Hanoi
• Transliterate English text using the Greek alphabet
• Tree datastructures
• Tree from nesting levels
• Tree traversal
• Tropical algebra overloading
• Truncatable primes
• Truncate a file
• Truth table
• Tupper's self-referential formula
• Twelve statements
• Two bullet roulette
• Two's complement

U

• UPC
• URL decoding
• URL parser
• UTF-8 encode and decode
• Ukkonen’s suffix tree construction
• Ulam spiral (for primes)
• Ultra useful primes
• Unbias a random generator
• Undefined values
• Undulating numbers
• Unicode strings
• Unicode variable names
• Universal Lambda Machine
• Universal Turing machine
• Unix/ls
• Unprimeable numbers
• Untouchable numbers
• Update a configuration file
• Use another language to call a function
• User input/Graphical

V

• Validate International Securities Identification Number
• Vampire number
• Van Eck sequence
• Van der Corput sequence
• Variable declaration reset
• Variable-length quantity
• Variadic fixed-point combinator
• Vector
• Vector products
• Verhoeff algorithm
• Verify distribution uniformity/Chi-squared test
• Verify distribution uniformity/Naive
• Vigenère cipher/Cryptanalysis
• Visualize a tree
• Vogel's approximation method
• Voronoi diagram

W

• Wagstaff primes
• Walk a directory/Non-recursively
• Walk a directory/Recursively
• Wasteful, equidigital and frugal numbers
• Water collected between towers
• Web scraping
• Weird numbers
• Wieferich primes
• Window creation
• Window creation/X11
• Window management
• Wireworld
• Word frequency
• Word ladder
• Word search
• Word wheel
• Word wrap
• Wordiff
• Wordle comparison
• World Cup group stage
• Worthwhile task shaving
• Write to Windows event log

X

• XML/DOM serialization
• XML/Input
• XML/XPath
• Xiaolin Wu's line algorithm

Y

• Y combinator
• Yahoo! search interface
• Yellowstone sequence

Z

• Zebra puzzle
• Zeckendorf arithmetic
• Zeckendorf number representation
• Zhang-Suen thinning algorithm
• Zsigmondy numbers
• Zumkeller numbers

Draft tasks not implemented in Applesoft_BASIC

1

• 10001th prime
• 15 puzzle game in 3D
• 16 puzzle game

3

• 3d turtle graphics

A

• A* search algorithm
• ABC words
• ASCII control characters
• Addition chains
• Addition-chain exponentiation
• Air mass
• Alternade words
• Anaprimes
• Append numbers at same position in strings
• Apéry's constant
• Arithmetic coding/As a generalized change of radix
• Aspect oriented programming
• Assertions in design by contract
• Audio alarm
• Audio frequency generator
• Audio overlap loop
• Autogram checker

B

• B-spline
• Bacon cipher
• Banker's algorithm
• Base 16 numbers needing a to f
• Base58Check encoding
• Base64 encode data
• Bilinear interpolation
• Binary coded decimal
• Binomial transform
• Bioinformatics/Subsequence
• Birthday problem
• Black box
• Blackjack strategy
• Boids
• Brace expansion using ranges

C

• CLI-based maze-game
• CORDIC
• Calmo numbers
• CalmoSoft primes
• Card shuffles
• Carmichael lambda function
• Centroid of a set of N-dimensional points
• Change e letters to i in words
• Changeable words
• Checksumcolor
• Chemical calculator
• Chess player
• Cipolla's algorithm
• Code Golf: Code Golf
• Code segment unload
• Collect and sort square numbers in ascending order from three lists
• Color separation
• Combinations with repetitions/Square digit chain
• Common list elements
• Common sorted list
• Compiler/Preprocessor
• Compiler/Simple file inclusion pre processor
• Compiler/Verifying syntax
• Concatenate two primes is also prime
• Conjugate a Latin verb
• Consistent overhead byte stuffing
• Continued fraction convergents
• Convert CSV records to TSV
• Coprime triplets
• Coprimes
• Count the coins/0-1
• Countdown
• Cousin primes
• Create an executable for a program in an interpreted language
• Create an object/Native demonstration
• Create your own text control codes
• Cross compilation
• Cubic special primes
• Curve that touches three points
• Cycle detection

D

• Data Encryption Standard
• Dating agency
• Day of the week of Christmas and New Year
• Days between dates
• Decimal floating point number to binary
• Decision tables
• Digit fifth powers
• Diophantine linear system solving
• Discrete Fourier transform
• Distinct palindromes within decimal numbers
• Distinct power numbers
• Divide a rectangle into a number of unequal triangles
• Double Twin Primes
• Doubly-linked list/Element removal
• Draw pixel 2

E

• Eisenstein primes
• Elevator simulation
• Engel expansion
• English cardinal anagrams
• Erdős-primes
• Erdős–Woods numbers
• Even numbers which cannot be expressed as the sum of two twin primes
• Execute CopyPasta Language
• Exponential digital sums
• Extended Straddling Checkerboard
• External sort
• Extra primes
• Extract file extension
• Extreme primes

F

• Factor-perfect numbers
• Fibonacci heap
• Fibonacci matrix-exponentiation
• Find URI in text
• Find adjacent primes which differ by a square integer
• Find first and last set bit of a long integer
• Find first missing positive
• Find minimum number of coins that make a given value
• Find prime n such that reversed n is also prime
• Find prime numbers of the form n*n*n+2
• Find square difference
• Find squares n where n+1 is prime
• Find words which contain the most consonants
• Find words which contains all the vowels
• Find words which contains more than 3 e vowels
• Find words whose first and last three letters are equal
• Find words with alternating vowels and consonants
• Finite state machine
• First 9 prime Fibonacci number
• Forbidden numbers
• Four sides of square
• Free polyominoes enumeration
• Frobenius numbers

G

• Generalised floating point addition
• Generalised floating point multiplication
• Generate random numbers without repeating a value
• Geohash
• Geometric algebra
• Getting the number of decimal places
• Goodstein Sequence
• Gradient descent
• Greed

H

• Hex dump
• Hexapawn
• Horse racing
• Hourglass puzzle

I

• IPC via named pipe
• IRC gateway
• Iccanobif primes
• Inner classes
• Integer long division
• Integer roots
• Interactive help
• Inventory sequence
• Iterators

J

• JSON pointer
• Jaccard index
• Just in time processing on a character stream

K

• Kahan summation
• Knuth-Morris-Pratt string search

L

• L-system
• Lagrange Interpolation
• Largest difference between adjacent primes
• Largest five adjacent number
• Largest palindrome product
• Largest product in a grid
• Latin Squares in reduced form/Randomizing using Jacobson and Matthews' technique
• Launch rocket with countdown and acceleration in stdout
• Least m such that n! + m is prime
• Length of an arc between two angles
• Line circle intersection
• Long stairs
• Longest common prefix
• Longest common suffix
• Longest palindromic substrings
• Longest substrings without repeating characters
• Lucas-Carmichael numbers

M

• Magic numbers
• Marching squares
• Markov chain text generator
• Matrix with two diagonals
• Maximum difference between adjacent elements of list
• Mersenne primes
• Minimum primes
• Modulinos
• Montgomery reduction
• Morpion solitaire
• Mosaic matrix
• Most frequent k chars distance
• Multidimensional Newton-Raphson method
• Multiline shebang
• Multiplicatively perfect numbers
• Multiton

N

• N-body problem
• N-grams
• N-queens minimum and knights and bishops
• NYSIIS
• Names to numbers
• Native shebang
• Neighbour primes
• Next special primes
• Nice primes
• Nimber arithmetic
• Number triplets game
• Numbers divisible by their individual digits, but not by the product of their digits.
• Numbers in base 10 that are palindromic in bases 2, 4, and 16
• Numbers in base-16 representation that cannot be written with decimal digits
• Numbers whose binary and ternary digit sums are prime
• Numbers whose count of divisors is prime
• Numbers with prime digits whose sum is 13
• Numbers with same digit set in base 10 and base 16
• Numeric separator syntax
• Numerical integration/Adaptive Simpson's method

O

• Odd and square numbers
• Odd squarefree semiprimes
• Odd words
• One-two primes
• OpenGL pixel shader
• OpenGL/Utah teapot
• Orbital elements
• Ormiston pairs
• Overloaded operators

P

• Palindromic primes
• Palindromic primes in base 16
• Pandigital prime
• Parse EBNF
• Parse command-line arguments
• Particle swarm optimization
• Penholodigital squares
• Penrose tiling
• Perceptron
• Permutations with repetitions
• Permutations with some identical elements
• Permuted multiples
• Piprimes
• Polynomial derivative
• Polynomial synthetic division
• Posit numbers/decoding
• Posit numbers/encoding
• Positive decimal integers with the digit 1 occurring exactly twice
• Powerful numbers
• Practical numbers
• Price list behind API
• Prime numbers p for which the sum of primes less than or equal to p is prime
• Prime numbers which contain 123
• Prime reciprocal sum
• Prime triplets
• Prime words
• Primes which contain only one odd digit
• Primes whose first and last number is 3
• Primes whose sum of digits is 25
• Primes with digits in nondecreasing order
• Print itself
• Process SMIL directives in XML data
• Product of divisors
• Proof
• Protecting Memory Secrets
• Pseudorandom number generator image

R

• Railway circuit
• Rainbow
• Ramanujan primes
• Ramsey's theorem
• Range modifications
• Raster bars
• Readline interface
• Recursive descent parser generator
• Red black tree sort
• Remote agent/Agent interface
• Remote agent/Agent logic
• Remote agent/Simulation
• Resistance calculator
• Resistance network calculator
• Reverse the gender of a string
• Reverse the order of lines in a text file while preserving the contents of each line
• Rice coding
• Robots
• Rodrigues’ rotation formula
• Roots of a cubic polynomial
• Rosetta Code/List authors of task descriptions
• Rosetta Code/Run examples
• Rosetta Code/Tasks without examples
• Run as a daemon or service

S

• SEND + MORE = MONEY
• Safe and Sophie Germain primes
• Safe mode
• Sanitize user input
• Sattolo cycle
• Sealed classes and methods
• Segmentation fault protection
• Selection bias in clinical sciences
• Selective file copy
• Self-hosting compiler
• Separate the house number from the street name
• Shift list elements to left by 3
• Show the (decimal) value of a number of 1s appended with a 3, then squared
• Sierpinski curve
• Simulated annealing
• Simulated optics experiment/Data analysis
• Simulated optics experiment/Simulator
• Sine wave
• Singly-linked list/Element removal
• Singly-linked list/Reversal
• Smallest enclosing circle problem
• Smallest multiple
• Smallest numbers
• Smallest power of 6 whose decimal expansion contains n
• Smallest square that begins with n
• Snake and ladder
• Solve a Rubik's cube
• Solve equations with substitution method
• Solve hanging lantern problem
• Solve triangle solitaire puzzle
• Solving coin problems
• Sort primes from list to a list
• Sort the letters of string in alphabetical order
• Sorting algorithms/Cycle sort
• Sorting algorithms/Tree sort on a linked list
• Special divisors
• Special factorials
• Special neighbor primes
• Special pythagorean triplet
• Spoof game
• Square root by hand
• Starting a web browser
• Statistics/Chi-squared distribution
• Strange numbers
• Strange plus numbers
• Strange unique prime triplets
• Sturmian word
• Subset sum problem
• Substring primes
• Suffix tree
• Sum data type
• Sum of divisors
• Sum of first n cubes
• Sum of primes in odd positions is prime
• Sum of square and cube digits of an integer are primes
• Sum of the digits of n is substring of n
• Sum of two adjacent numbers are primes
• Summation of primes
• Syntax highlighting using Mediawiki formatting
• Szymański's algorithm

T

• Table creation
• Tamagotchi emulator
• Terminal control/Restricted width positional input/No wrapping
• Terminal control/Restricted width positional input/With wrapping
• Text between
• Text completion
• Text to HTML
• The ISAAC cipher
• Three word location
• Time-based one-time password algorithm
• Topological sort/Extracted top item
• Transportation problem
• Triangular numbers
• Triplet of three numbers
• Two identical strings
• Two sum
• Type detection

U

• URL shortener
• Ulam numbers
• Unicode polynomial equation
• Unique characters
• Unique characters in each string
• Unit testing
• Uno (card game)
• Untrusted environment
• Use a REST API
• User defined pipe and redirection operators
• Using a speech engine to highlight words

V

• Vibrating rectangles
• Vidir
• Visitor pattern

W

• Walsh matrix
• Wave function collapse
• Waveform analysis/Doh ray me
• Waveform analysis/Top and tail
• Weather routing
• WebGL rotating F
• Welch's t-test
• WiktionaryDumps to words
• Wolstenholme numbers
• Word break problem
• Words containing "the" substring
• Words from neighbour ones

X

• XML validation
• XXXX redacted

Tasks omitted from Applesoft_BASIC

A

• Abstract type
• Add a variable to a class instance at runtime
• Associative array/Creation
• Associative array/Iteration

G

• GUI component interaction
• GUI enabling/disabling of controls

H

• HTTP
• HTTPS
• Hello world/Standard error

L

• Linux CPU utilization

P

• Play recorded sounds

S

• Sockets‎

End of List

Again, feel free to try your hand at any of the tasks listed on this page.