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