Tasks not implemented in Lua
Awareness
If Lua is a language you like, or are interested in, please inform your fellow members of the Lua community; this page can't be emptied without your and their participation.
If Lua is a language you like, or are interested in, please inform your fellow members of the Lua community; this page can't be emptied without your and their participation.
Tasks not implemented in Lua
A
- ABC correlation
- ADFGVX cipher
- Achilles numbers
- Active Directory/Connect
- Active Directory/Search for a user
- Algebraic data types
- Aliquot sequence classifications
- Almkvist-Giullera formula for pi
- Anagram generator
- Anaprimes
- Animated Spinners
- Apéry's constant
- Arithmetic-geometric mean/Calculate Pi
- Atomic updates
- Autogram checker
B
- Babylonian spiral
- Bernstein basis polynomials
- Binomial transform
- Bioinformatics/Global alignment
- Bitcoin/address validation
- Bitcoin/public point to address
- Bitmap/PPM conversion through a pipe
- Blum integer
- Boustrophedon transform
- Boyer-Moore string search
- Brilliant numbers
- Bron–Kerbosch algorithm
- Bézier curves/Intersections
C
- Calkin-Wilf sequence
- Canny edge detector
- Catmull–Clark subdivision surface
- Centre and radius of a circle passing through 3 points in a plane
- 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
- Checkpoint synchronization
- Chernick's Carmichael numbers
- Cholesky decomposition
- Closest-pair problem
- Color of a screen pixel
- Color quantization
- Colorful numbers
- Colour pinstripe/Printer
- Commatizing numbers
- Compare sorting algorithms' performance
- Compiler/AST interpreter
- Compiler/Simple file inclusion pre processor
- Compiler/code generator
- Compiler/syntax analyzer
- Compiler/virtual machine interpreter
- Composite numbers k with no single digit factors whose factors are all substrings of k
- Conjugate transpose
- 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)
- Curzon numbers
- Cycles of a permutation
- Cyclops numbers
- Cyclotomic polynomial
D
- Dating agency
- De Polignac numbers
- Deconvolution/2D+
- Deming's funnel
- Determine if only one instance is running
- Digital root/Multiplicative digital root
- Dining philosophers
- Discordian date
- Display an outline as a nested table
- Distance and Bearing
- Distributed programming
- Distribution of 0 digits in factorial series
- Dominoes
- Doomsday rule
E
- EKG sequence convergence
- Earliest difference between prime gaps
- Eertree
- Element-wise operations
- Elementary cellular automaton/Infinite length
- Elementary cellular automaton/Random number generator
- Elliptic Curve Digital Signature Algorithm
- Elliptic curve arithmetic
- Engel expansion
- Erdös-Selfridge categorization of primes
- Erdős-Nicolas numbers
- Events
F
- FTP
- Factorial base numbers indexing permutations of a collection
- Factorions
- Factorize string into Lyndon words
- Factors of a Mersenne number
- Fermat numbers
- Fermat pseudoprimes
- File size distribution
- Find Chess960 starting position identifier
- Find common directory path
- Find duplicate files
- Find largest left truncatable prime in a given base
- Find palindromic numbers in both binary and ternary bases
- First perfect square in base n with n unique digits
- First power of 2 that has leading decimal digits of 12
- Fortunate numbers
- Four is the number of letters in the ...
- Fractran
- French Republican calendar
- Function frequency
G
- GSTrans string conversion
- GUI component interaction
- GUI enabling/disabling of controls
- Gauss-Jordan matrix inversion
- Gaussian elimination
- Gaussian primes
- Generate random chess position
- Gotchas
- Graph colouring
- Greatest prime dividing the n-th cubefree number
- Greedy algorithm for Egyptian fractions
H
- HTTPS/Client-authenticated
- Harriss Spiral
- Hashtron inference
- Hello world/Line printer
- Hex dump
- Hickerson series of almost integers
- Hofstadter Figure-Figure sequences
- Home primes
- Honaker primes
- Honeycombs
- Horse racing
- Hough transform
- Hunt the Wumpus
I
- I'm a software engineer, get me out of here
- Image convolution
- Image noise
- Imaginary base numbers
- Increasing gaps between consecutive Niven numbers
- Index finite lists of positive integers
- Inner classes
- Intersecting number wheels
- Inventory sequence
- Inverted index
- Isograms and heterograms
J
- JSON pointer
- Jacobsthal numbers
- Jaro similarity
- Jaro-Winkler distance
- Jordan-Pólya numbers
- Joystick position
- Juggler sequence
K
- K-d tree
- Keyboard input/Flush the keyboard buffer
- Keyboard input/Keypress check
- Keyboard input/Obtain a Y or N response
- Keyboard macros
- Klarner-Rado sequence
- Knapsack problem/Bounded
- Knapsack problem/Continuous
- Knuth's algorithm S
- Knuth's power tree
L
- LU decomposition
- Lah numbers
- Latin Squares in reduced form
- Least m such that n! + m is prime
- Legendre prime counting function
- Levenshtein distance/Alignment
- Logistic curve fitting in epidemiology
- Long multiplication
- Long primes
- Longest common substring
- Lucas-Lehmer test
- Lucky and even lucky numbers
- Lychrel numbers
- Lyndon word
M
- Machine code
- Magic numbers
- Magnanimous numbers
- Main step of GOST 28147-89
- Matrix digital rain
- Mayan calendar
- Mayan numerals
- Maze solving
- Median filter
- Meissel–Mertens constant
- Memory allocation
- Memory layout of a data structure
- Merge and aggregate datasets
- Mertens function
- Metallic ratios
- Metered concurrency
- Metronome
- Mian-Chowla sequence
- Minesweeper game
- Minimal steps down to 1
- Minimum multiple of m where digital sum equals m
- Minkowski question-mark function
- Modified random distribution
- Modular exponentiation
- Modular inverse
- Monads/List monad
- Monads/Writer monad
- Motzkin numbers
- Mouse position
- Multi-base primes
- Multiple regression
- Multiplicative order
- Mutex
N
- N-smooth numbers
- Narcissist
- Natural sorting
- Nautical bell
- Negative base numbers
- Nested templated data
- Non-continuous subsequences
- Non-transitive dice
- Nonogram solver
- Numbers k such that the last letter of k is the same as the first letter of k+1
- Numbers with equal rises and falls
- Numeric error propagation
- Numerical and alphabetical suffixes
O
- OLE automation
- Object serialization
- Old Russian measure of length
- One-time pad
- OpenWebNet password
- Ormiston triples
- Own digits power sum
P
- P-Adic numbers, basic
- P-Adic square roots
- P-value correction
- Padovan n-step number sequences
- Pairs with common factors
- Palindromic gapful numbers
- Pan base non-primes
- Pancake numbers
- Paraffins
- Parallel brute force
- Parallel calculations
- Parameterized SQL statement
- Parametric polymorphism
- Parse an IP Address
- Partition an integer x into n primes
- Partition function P
- Pascal's triangle/Puzzle
- Pathological floating point problems
- Peaceful chess queen armies
- Pell numbers
- Pell's equation
- Penta-power prime seeds
- Pentomino tiling
- Percolation/Bond percolation
- Percolation/Mean cluster density
- Percolation/Mean run density
- Percolation/Site percolation
- Periodic table
- Peripheral drift illusion
- Permutation test
- Permutations/Rank of a permutation
- Pig the dice game/Player
- Pinstripe/Printer
- Play recorded sounds
- Playfair cipher
- Polynomial long division
- Prime numbers whose neighboring pairs are tetraprimes
- Prime triangle
- Primes - allocate descendants to their ancestors
- Primes: n*2^m+1
- Primorial numbers
- Product of min and max prime factors
- Pseudo-random numbers/Combined recursive generator MRG32k3a
- Pseudo-random numbers/Splitmix64
- Pythagoras tree
- Pythagorean triples
Q
R
- RCRPG
- RPG attributes generator
- RSA code
- Ramanujan primes/twins
- Ramanujan's constant
- Ramer-Douglas-Peucker line simplification
- Random Latin squares
- Random number generator (device)
- Random sentence from book
- Range consolidation
- Ranking methods
- Rate counter
- Record sound
- Rendezvous
- Rep-string
- Repunit primes
- Resistor mesh
- Retrieve and search chat history
- Rhonda numbers
- Rosetta Code/Count examples
- Rosetta Code/Find bare lang tags
- Rosetta Code/Rank languages by number of users
- Rosetta Code/Rank languages by popularity
- Round-robin tournament schedule
- Ruth-Aaron numbers
S
- SEDOLs
- SHA-256 Merkle tree
- SOAP
- SQL-based authentication
- Safe addition
- Sealed classes and methods
- Search in paragraph's text
- Selectively replace multiple instances of a character within a string
- Self numbers
- 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 puzzle
- Set right-adjacent bits
- Set, the card game
- Shortest common supersequence
- Sierpinski arrowhead curve
- Sierpinski square curve
- Sieve of Pritchard
- Simple database
- Simple turtle graphics
- Simulate input/Keyboard
- 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-Wellin primes
- Sokoban
- Soloway's recurring rainfall
- Solve a Hidato puzzle
- Solve a Hopido puzzle
- Solve a Numbrix puzzle
- Solve the no connection puzzle
- Sorensen–Dice coefficient
- Sort an outline at every level
- Sorting algorithms/Cocktail sort with shifting bounds
- Sorting algorithms/Heapsort
- Sorting algorithms/Patience sort
- Sorting algorithms/Radix sort
- Sorting algorithms/Strand sort
- Sparkline in unicode
- Speech synthesis
- Spelling of ordinal numbers
- Sphenic numbers
- Square form factorization
- Start from a main routine
- State name puzzle
- Steffensen's method
- Strassen's algorithm
- Stream merge
- Suffixation of decimal numbers
- Sum of elements below main diagonal of matrix
- Summarize primes
- Super-Poulet numbers
- Superpermutation minimisation
- Sylvester's sequence
- Sync subtitles
- Syntax highlighting using Mediawiki formatting
T
- Tarjan
- Teacup rim text
- Terminal control/Cursor movement
- Terminal control/Cursor positioning
- Terminal control/Dimensions
- Terminal control/Hiding the cursor
- Terminal control/Inverse video
- Terminal control/Positional read
- Terminal control/Preserve screen
- Terminal control/Unicode output
- Ternary logic
- The sieve of Sundaram
- Thiele's interpolation formula
- Tonelli-Shanks algorithm
- Topic variable
- Topological sort
- Total circles area
- Transliterate English text using the Greek alphabet
- Tree datastructures
- Tree from nesting levels
- Tropical algebra overloading
- Truth table
- Twelve statements
- Twin primes
- Twin primes whose sum is square number
- Two bullet roulette
- Two's complement
U
- UPC
- Ukkonen’s suffix tree construction
- Ultra useful primes
- Undulating numbers
- Universal Lambda Machine
- Untouchable numbers
- Update a configuration file
- Use another language to call a function
- User input/Graphical
V
- Vampire number
- Variable declaration reset
- Variable size/Set
- Variable-length quantity
- Variadic fixed-point combinator
- Verhoeff algorithm
- Verify distribution uniformity/Chi-squared test
- Verify distribution uniformity/Naive
- Vigenère cipher/Cryptanalysis
W
- Wagstaff primes
- Wasteful, equidigital and frugal numbers
- Wieferich primes
- Wilson primes of order n
- Window creation/X11
- Window management
- Wolstenholme numbers
- Word ladder
- Word search
- Wordiff
- Wordle comparison
- Worthwhile task shaving
- Write to Windows event log
X
Y
Z
Draft tasks not implemented in Lua
1
3
A
- ASCII control characters
- Addition-chain exponentiation
- Air mass
- Alternade words
- Arithmetic coding/As a generalized change of radix
- Aspect oriented programming
- Assertions in design by contract
- Audio frequency generator
- Audio overlap loop
B
- Banker's algorithm
- Base 16 numbers needing a to f
- Base58Check encoding
- Bilinear interpolation
- Binary coded decimal
- Bioinformatics/Subsequence
- Birthday problem
- Black box
- Blackjack strategy
- Boids
- Brace expansion using ranges
- Brzozowski algebraic method
C
- CLI-based maze-game
- CalmoSoft primes
- Carmichael lambda function
- Change e letters to i in words
- Changeable words
- Checksumcolor
- Chess player
- Cipolla's algorithm
- 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/Verifying syntax
- Conjugate a Latin verb
- Consistent overhead byte stuffing
- Continued fraction convergents
- Convert CSV records to TSV
- Coprime triplets
- Coprimes
- Count how many vowels and consonants occur in a string
- Count the coins/0-1
- Countdown
- Create an executable for a program in an interpreted language
- Create an object/Native demonstration
- Create your own text control codes
- Cross compilation
- Curve that touches three points
D
- Data Encryption Standard
- Day of the week of Christmas and New Year
- Decimal floating point number to binary
- 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
- English cardinal anagrams
- Erdős–Woods numbers
- Even numbers which cannot be expressed as the sum of two twin primes
- Exactly three adjacent 3 in lists
- Execute CopyPasta Language
- Exponential digital sums
- Extended Straddling Checkerboard
- External sort
- 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 prime numbers of the form n*n*n+2
- Find square difference
- Find squares n where n+1 is prime
- Find words which contain all the vowels
- Find words which contain the most consonants
- 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
- 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
I
J
K
L
- L-system
- Lagrange Interpolation
- Largest difference between adjacent primes
- Largest five adjacent number
- Largest palindrome product
- Largest prime factor
- Largest product in a grid
- Last list item
- Latin Squares in reduced form/Randomizing using Jacobson and Matthews' technique
- Launch rocket with countdown and acceleration in stdout
- Linux CPU utilization
- Long stairs
- Longest common suffix
- Longest palindromic substrings
- Longest substrings without repeating characters
- Lucas-Carmichael numbers
M
- Make a backup file
- Matrix with two diagonals
- Maximum difference between adjacent elements of list
- McNaughton-Yamada-Thompson algorithm
- Minimum number of cells after, before, above and below NxN squares
- Minimum numbers of three lists
- Minimum primes
- 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
- Nimber arithmetic
- Number triplets game
- Numbers divisible by their individual digits, but not by the product of their digits.
- 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 same digit set in base 10 and base 16
- Numeric separator syntax
- Numerical integration/Adaptive Simpson's method
O
- Odd squarefree semiprimes
- One-two primes
- OpenGL pixel shader
- OpenGL/Utah teapot
- 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
- Permutations with repetitions
- Permutations with some identical elements
- Permuted multiples
- Piprimes
- Pollard's rho algorithm
- Polynomial derivative
- Polynomial synthetic division
- Posit numbers/decoding
- Posit numbers/encoding
- Positive decimal integers with the digit 1 occurring exactly twice
- 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 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 debugging statement
- Process SMIL directives in XML data
- Product of divisors
- Proof
- Protecting Memory Secrets
Q
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 order of lines in a text file while preserving the contents of each line
- 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
- Segmentation fault protection
- Selection bias in clinical sciences
- Selective file copy
- Self-hosting compiler
- Separate the house number from the street name
- Shape-Machine
- Shift list elements to left by 3
- 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
- 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
- Sorting algorithms/Tree sort on a linked list
- Special divisors
- 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 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
- Sunflower fractal
- Szymański's algorithm
T
- Tamagotchi emulator
- Terminal control/Restricted width positional input/No wrapping
- Terminal control/Restricted width positional input/With wrapping
- Tetris
- Text completion
- Text to HTML
- Time conventions and conversions
- Time-based one-time password algorithm
- Topological sort/Extracted top item
- Transportation problem
- Triangular numbers
- Triplet of three numbers
- Two identical strings
U
- URL shortener
- Unicode polynomial equation
- Unique characters in each string
- Unit testing
- Uno (card game)
- Upside-down numbers
- Use a REST API
- Useless instructions
- User defined pipe and redirection operators
- Using a speech engine to highlight words
V
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
X
Tasks omitted from Lua
C
H
End of List
Again, feel free to try your hand at any of the tasks listed on this page.