Tasks not implemented in JavaScript
Awareness
If JavaScript is a language you like, or are interested in, please inform your fellow members of the JavaScript community; this page can't be emptied without your and their participation.
If JavaScript is a language you like, or are interested in, please inform your fellow members of the JavaScript community; this page can't be emptied without your and their participation.
Tasks not implemented in JavaScript
A
- Abelian sandpile model
- Abelian sandpile model/Identity
- Active Directory/Connect
- Active Directory/Search for a user
- Additive primes
- Algebraic data types
- Anagram generator
- Animated Spinners
- Append a record to the end of a text file
- Apply a digital filter (direct form II transposed)
- Approximate equality
- Apéry's constant
- Arena storage pool
- Arithmetic derivative
B
- Bernoulli's triangle
- Bin given limits
- Bioinformatics/Global alignment
- Biorhythms
- Bitmap/Bézier curves/Quadratic
- Bitmap/Flood fill
- Bitmap/Histogram
- Bitmap/Midpoint circle algorithm
- Bitmap/PPM conversion through a pipe
- Bitmap/Read a PPM file
- Bitmap/Read an image through a pipe
- Bitmap/Write a PPM file
- Bitwise IO
- Blum integer
- Bulls and cows/Player
C
- Calendar - for "REAL" programmers
- Call a function in a shared library
- Canny edge detector
- Centre and radius of a circle passing through 3 points in a plane
- Check Machin-like formulas
- Check input device is a terminal
- Cocke–Younger–Kasami (CYK) Algorithm
- Color of a screen pixel
- Color quantization
- Color wheel
- Colour bars/Display
- Colour pinstripe/Display
- Colour pinstripe/Printer
- Combinations and permutations
- Compiler/AST interpreter
- Compiler/Simple file inclusion pre processor
- Compiler/syntax analyzer
- Compiler/virtual machine interpreter
- Conjugate transpose
- Consecutive primes with ascending or descending differences
- Cut a rectangle
D
- Dating agency
- Deceptive numbers
- Descending primes
- Determine if a string is squeezable
- Determine if only one instance is running
- Determine if two triangles overlap
- Determine sentence type
- Dining philosophers
- Distance and Bearing
- Documentation
- Draw a pixel
E
- Earliest difference between prime gaps
- Elementary cellular automaton/Infinite length
- Elementary cellular automaton/Random number generator
- Entropy/Narcissist
- Equal prime and composite sums
- Euler's identity
- Executable library
- Execute Computer/Zero
- Experimental Verification of the NKT Law: Interpolating the Masses of 8 Planets Using NASA Data as of 30–31/12/2024
- Experimental Verification of the NKTg Law Using NASA Mercury Data in 2025
- Experimental Verification of the NKTg Law Using NASA Neptune Data (2023–2024)
- Experimental Verification of the NKTg Law in Earth Orbit Based on NASA’s 2025 Earth Dataset
- Extend your language
- Extreme floating point values
F
- FTP
- Faces from a mesh
- Factorial primes
- Feigenbaum constant calculation
- Fermat pseudoprimes
- File size distribution
- Find Chess960 starting position identifier
- Find duplicate files
- Find largest left truncatable prime in a given base
- Find the intersection of a line with a plane
- First class environments
- First power of 2 that has leading decimal digits of 12
- Fixed length records
- Forbidden numbers
- Formal power series
- Fortunate numbers
- Four is the number of letters in the ...
- Function frequency
G
- GSTrans string conversion
- GUI component interaction
- GUI enabling/disabling of controls
- GUI/Maximum window dimensions
- Gaussian primes
- Get system command output
- Globally replace text in several files
- Go Fish
- Goldbach's comet
- Golden ratio/Convergence
- Greatest prime dividing the n-th cubefree number
H
- HTTPS/Authenticated
- HTTPS/Client-authenticated
- Harmonic series
- Harriss Spiral
- Hashtron inference
- Hex words
- Hickerson series of almost integers
- History variables
- Honaker primes
- Honeycombs
- Horse racing
- Hough transform
I
- I before E except after C
- I'm a software engineer, get me out of here
- Iccanobif primes
- Idiomatically determine all the characters that can be used for symbols
- Idiomatically determine all the lowercase and uppercase letters
- Idoneal numbers
- Imaginary base numbers
- Inconsummate numbers in base 10
- Increasing gaps between consecutive Niven numbers
- Index finite lists of positive integers
- Integer overflow
- Inverted index
- Inverted syntax
- Isograms and heterograms
- Iterated digits squaring
J
K
L
- Lah numbers
- Latin Squares in reduced form
- Least m such that n! + m is prime
- Left factorials
- Logistic curve fitting in epidemiology
- Long primes
- Longest string challenge
- Loops/Increment loop index within loop body
M
- Machine code
- Mad Libs
- Magic numbers
- Magic squares of singly even order
- Magnanimous numbers
- Matrix chain multiplication
- Mayan calendar
- Median filter
- Mertens function
- Metallic ratios
- Metered concurrency
- 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
- Modular arithmetic
- Modular exponentiation
- Motor
- Multi-base primes
- Multiplicative order
- Multiton
- Munching squares
- Mutex
N
- Naming conventions
- Nautical bell
- Negative base numbers
- Nested templated data
- 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 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/Romberg integration
O
- Object serialization
- Odd word problem
- Old Russian measure of length
- One of n lines in a file
- One-time pad
- One-two primes
- Order by pair comparisons
- Ormiston pairs
- Ormiston triples
P
- Pairs with common factors
- Palindromic primes in base 16
- Pan base non-primes
- Parallel brute force
- Parameterized SQL statement
- Particle fountain
- Partition an integer x into n primes
- Passphrase generator
- Pathological floating point problems
- Peaceful chess queen armies
- Peano curve
- Pell numbers
- Pell's equation
- Penholodigital squares
- Penney's game
- Penta-power prime seeds
- Pentagram
- Pentomino tiling
- Peripheral drift illusion
- Permutation test
- Permutations by swapping
- Permutations/Derangements
- Permutations/Rank of a permutation
- Pernicious numbers
- Pi to 1 million digits
- Pierpont primes
- Pig the dice game/Player
- Pinstripe/Display
- Pinstripe/Printer
- Piprimes
- Play recorded sounds
- Plot coordinate pairs
- Polynomial long division
- Polynomial regression
- Pragmatic directives
- Primality by Wilson's theorem
- Prime conspiracy
- Prime numbers whose neighboring pairs are tetraprimes
- Prime reciprocal sum
- Prime triangle
- Primes - allocate descendants to their ancestors
- Primes: n*2^m+1
- Problem of Apollonius
- Product of min and max prime factors
- Pseudo-random numbers/Combined recursive generator MRG32k3a
- Punched cards
Q
R
- RSA code
- Radical of an integer
- Ramanujan primes/twins
- Ramanujan's constant
- Random number generator (device)
- Random sentence from book
- Rare numbers
- Rational calculator
- Read a file character by character/UTF8
- Read a specific line from a file
- Record sound
- Remove lines from a file
- Repunit primes
- Retrieve and search chat history
- Rhonda numbers
- Riordan numbers
- Roots of a quadratic function
- 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
- Routh–Hurwitz stability criterion
- Ruth-Aaron numbers
S
- SOAP
- SQL-based authentication
- Safe addition
- Safe primes and unsafe primes
- Same fringe
- Scope/Function names and labels
- Sealed classes and methods
- Search in paragraph's text
- Secure temporary file
- Self numbers
- Semiprime
- 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
- Set right-adjacent bits
- Sexy primes
- Sierpinski arrowhead curve
- Sierpinski square curve
- Sieve of Pritchard
- Simple database
- Simple turtle graphics
- Simulate input/Keyboard
- Simulate input/Mouse
- Singular value decomposition
- Sleeping Beauty problem
- Smallest number k such that k+2^m is composite for all m less than k
- Smarandache-Wellin primes
- Sockets
- Soloway's recurring rainfall
- Sorensen–Dice coefficient
- Sort a list of object identifiers
- Sort an outline at every level
- Sorting algorithms/Bead sort
- Sorting algorithms/Circle sort
- Sorting algorithms/Cocktail sort with shifting bounds
- Sorting algorithms/Cycle sort
- Sorting algorithms/Permutation sort
- Sorting algorithms/Strand sort
- Specific characters
- Sphenic numbers
- Square form factorization
- Stair-climbing puzzle
- Start from a main routine
- Statistics/Basic
- Statistics/Normal distribution
- Stirling numbers of the first kind
- Stirling numbers of the second kind
- Strip block comments
- Strong and weak primes
- Subtractive generator
- Successive prime differences
- Suffixation of decimal numbers
- Summarize primes
- Super-Poulet numbers
- Super-d numbers
- Sync subtitles
- Synchronous concurrency
- Syntax highlighting using Mediawiki formatting
T
- Table creation/Postal addresses
- Tau function
- Terminal control/Clear the screen
- Terminal control/Coloured text
- Terminal control/Cursor movement
- Terminal control/Cursor positioning
- Terminal control/Dimensions
- Terminal control/Display an extended character
- Terminal control/Hiding the cursor
- Terminal control/Inverse video
- Terminal control/Positional read
- Terminal control/Ringing the terminal bell
- Terminal control/Unicode output
- Test integerness
- Textonyms
- Topic variable
- Total circles area
- Totient function
- Tree datastructures
- Tree from nesting levels
- Triangular numbers
- Tropical algebra overloading
- Truncatable primes
- Truncate a file
- Tupper's self-referential formula
- Twelve statements
- Twin primes
- Twin primes whose sum is square number
- Two identical strings
U
- UPC
- Ultra useful primes
- Undulating numbers
- Untouchable numbers
- Update a configuration file
- Upside-down numbers
- Use another language to call a function
V
- Validate International Securities Identification Number
- Vampire number
- Variadic fixed-point combinator
- Verify distribution uniformity/Chi-squared test
- Video display modes
W
- Wagstaff primes
- War card game
- Wasteful, equidigital and frugal numbers
- Wieferich primes
- Wilson primes of order n
- Window creation/X11
- Window management
- Wolstenholme numbers
- Word frequency
- Word search
- World Cup group stage
- Worthwhile task shaving
- Write entire file
- Write float arrays to a text file
- Write language name in 3D ASCII
- Write to Windows event log
X
Y
Z
Draft tasks not implemented in JavaScript
1
3
A
- ABC incremental counts
- ASCII control characters
- Addition chains
- Addition-chain exponentiation
- Air mass
- Alternade words
- Assertions in design by contract
- Audio frequency generator
B
C
- CLI-based maze-game
- Card shuffles
- Carmichael lambda function
- Centroid of a set of N-dimensional points
- Changeable words
- Chebyshev coefficients
- Chess player
- Chronological order
- Code segment unload
- Color separation
- Combinations with repetitions/Square digit chain
- Common list elements
- Compiler/Preprocessor
- Concatenate two primes is also prime
- Consistent overhead byte stuffing
- Continued fraction convergents
- Convert CSV records to TSV
- Convert day count to ordinal date
- Coprime triplets
- Coprimes
- Count the occurrence of each digit in e
- Cousin primes
- Create an executable for a program in an interpreted language
- Create your own text control codes
- Cross compilation
- Cubic special primes
- Curve that touches three points
- Cycle detection
D
- Data Encryption Standard
- Day of the week of Christmas and New Year
- Decimal floating point number to binary
- Decreasing contiguous subsequences
- 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 a diamond
- Draw a torus
E
- Eisenstein primes
- Elevator simulation
- Endless maze
- English cardinal anagrams
- Even numbers which cannot be expressed as the sum of two twin primes
- Execute CopyPasta Language
- Extended Straddling Checkerboard
- External sort
- Extra primes
- 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 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 all the vowels
- Find words whose first and last three letters are equal
- First 9 prime Fibonacci number
- Floyd-Steinberg dithering
- Frobenius numbers
G
- Generalised floating point addition
- Generalised floating point multiplication
- Geocentric model
- Gradient descent
H
I
- IPC via named pipe
- IRC gateway
- Implicit type conversion
- Input/Output for lines of text
- Input/Output for pairs of numbers
- Integer long division
- Integer roots
- Interactive help
J
K
L
- Largest difference between adjacent primes
- Largest prime factor
- Last list item
- Launch rocket with countdown and acceleration in stdout
- Line circle intersection
- List division
- Long stairs
- Longest palindromic substrings
- Longest substrings without repeating characters
- Lorenz attractor
- Lucas-Carmichael numbers
- Lunar arithmetic
M
- Make a backup file
- Mersenne primes
- Mill game
- Minimum number of cells after, before, above and below NxN squares
- Minimum primes
- Montgomery reduction
- Morpion solitaire
- Moser's circle problem
- Multidimensional Newton-Raphson method
- Multiline shebang
- Multiplicatively perfect numbers
- Möbius strip
N
- Names to numbers
- Native shebang
- Neighbour primes
- Next special primes
- Nice primes
- Nimber arithmetic
- No prime sums
- Number triplets game
- Numbers k whose divisor sum is equal to the divisor sum of k + 1
- Numbers whose binary and ternary digit sums are prime
- Numbers whose count of divisors is prime
- Numeric separator syntax
O
P
- Palindromic primes
- Pandigital prime
- Parse command-line arguments
- Penrose tiling
- Permutations with some identical elements
- Pfaffian and hfaffian
- Pollard's rho algorithm
- Polynomial synthetic division
- Posit numbers/decoding
- Powerful numbers
- Practical numbers
- Price list behind API
- Prime groups
- Prime groups, counting
- Prime numbers of measurement
- Prime numbers p for which the sum of primes less than or equal to p is prime
- Prime numbers which contain 123
- Prime triplets
- Prime words
- Primes which contain only one odd digit
- Primes whose first and last number is 3
- Primes with digits in nondecreasing order
- Print debugging statement
- Print itself
- Process SMIL directives in XML data
- Product of divisors
- Protecting Memory Secrets
- Pseudorandom number generator image
Q
R
- Railway circuit
- Rainbow
- Ramanujan primes
- Ramsey's theorem
- Raster bars
- Readline interface
- Recursive descent parser generator
- 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
- Robots
- Roots of a cubic polynomial
- Rosetta Code/List authors of task descriptions
- Rosetta Code/Run examples
- Rosetta Code/Tasks without examples
- Rubik's cube
- Run as a daemon or service
S
- SEND + MORE = MONEY
- Safe and Sophie Germain primes
- 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
- Shuffle groups
- Sierpinski curve
- Simulated optics experiment/Data analysis
- Simulated optics experiment/Simulator
- Singly-linked list/Element removal
- Singly-linked list/Reversal
- Snake and ladder
- 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
- Special divisors
- Special factorials
- Special neighbor primes
- Special pythagorean triplet
- Spoof game
- Square root by hand
- Starting a web browser
- Strange numbers
- Strange plus numbers
- Strange unique prime triplets
- Substring primes
- Sum data type
- Sum of divisors
- Sum of primes in odd positions is prime
- Sum of square and cube digits of an integer are primes
- Sum of two adjacent numbers are primes
- Summation of primes
T
- Table creation
- Tamagotchi emulator
- Terminal control/Restricted width positional input/No wrapping
- Terminal control/Restricted width positional input/With wrapping
- Text completion
- Text to HTML
- Time conventions and conversions
- Transportation problem
- Triplet of three numbers
U
- Ulam numbers
- Unicode polynomial equation
- Unit testing
- Uno (card game)
- Untrusted environment
- User defined pipe and redirection operators
- Using a speech engine to highlight words
V
W
- Wave function collapse
- Waveform analysis/Doh ray me
- Waveform analysis/Top and tail
- Weather routing
- WebGL rotating F
- WiktionaryDumps to words
X
Tasks omitted from JavaScript
A
C
D
F
H
I
M
O
P
R
S
V
End of List
Again, feel free to try your hand at any of the tasks listed on this page.