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
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
- Lucas-Carmichael numbers
- Lunar arithmetic
M
- Make a backup file
- McNaughton-Yamada-Thompson algorithm
- Mersenne primes
- Mill game
- Minimum number of cells after, before, above and below NxN squares
- Minimum numbers of three lists
- Minimum primes
- Modulinos
- Montgomery reduction
- Morpion solitaire
- Mosaic matrix
- Moser's circle problem
- Most frequent k chars distance
- Multidimensional Newton-Raphson method
- Multiline shebang
- Multiplicatively perfect numbers
- Möbius strip
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
- No prime sums
- Number triplets game
- 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 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
- 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 squarefree semiprimes
- Odd words
- OpenGL pixel shader
- OpenGL/Utah teapot
- Orbital elements
- Overloaded operators
P
- Palindromic primes
- Pandigital prime
- Parse EBNF
- Parse command-line arguments
- Particle swarm optimization
- Penrose tiling
- Perceptron
- Permutations with repetitions
- Permutations with some identical elements
- Permuted multiples
- Pfaffian and hfaffian
- Pig Latin
- 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
- 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 whose sum of digits is 25
- 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
- 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
- Remove vowels from a string
- 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
- Segmentation fault protection
- Selection bias in clinical sciences
- Selective file copy
- Self-contained numbers
- Self-hosting compiler
- Separate the house number from the street name
- Shape-Machine
- Shift list elements to left by 3
- Show the (decimal) value of a number of 1s appended with a 3, then squared
- Shuffle groups
- Sierpinski curve
- Sign of an integer (signum)
- 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/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
- Steady squares
- 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
- Sunflower fractal
- Szymański's algorithm
T
- Table creation
- Tamagotchi emulator
- Terminal control/Restricted width positional input/No wrapping
- Terminal control/Restricted width positional input/With wrapping
- Tetris
- Text between
- Text completion
- Text to HTML
- The ISAAC cipher
- Three word location
- Time conventions and conversions
- Time-based one-time password algorithm
- Topological sort/Extracted top item
- Transportation problem
- Triplet of three numbers
- Two sum
- Type detection
U
- URL shortener
- Ulam numbers
- Unescape a string
- Unicode polynomial equation
- Unique characters
- Unique characters in each string
- Unit testing
- Uno (card game)
- Untrusted environment
- Use a REST API
- Useless instructions
- 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
- Welch's t-test
- WiktionaryDumps to words
- Word break problem
- Words containing "the" substring
- Words from neighbour ones
X
Z
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.