Tasks not implemented in Factor
Awareness
If Factor is a language you like, or are interested in, please inform your fellow members of the Factor community; this page can't be emptied without your and their participation.
If Factor is a language you like, or are interested in, please inform your fellow members of the Factor community; this page can't be emptied without your and their participation.
Tasks not implemented in Factor
1
A
- ADFGVX cipher
- ASCII art diagram converter
- AVL tree
- Abelian sandpile model
- Active Directory/Connect
- Active Directory/Search for a user
- Algebraic data types
- Anagram generator
- Append a record to the end of a text file
- Apply a digital filter (direct form II transposed)
- Archimedean spiral
- Arena storage pool
- Arithmetic-geometric mean/Calculate Pi
- Atomic updates
B
- Babylonian spiral
- Barnsley fern
- Bernstein basis polynomials
- Best shuffle
- Bifid cipher
- Bioinformatics/Global alignment
- 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
- Boustrophedon transform
- Boyer-Moore string search
- Brace expansion
- Bézier curves/Intersections
C
- Call a function in a shared library
- Canny edge detector
- Casting out nines
- Catmull–Clark subdivision surface
- Centre and radius of a circle passing through 3 points in a plane
- Chaos game
- Chat server
- 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
- Church numerals
- Closest-pair problem
- Color of a screen pixel
- Color quantization
- Color wheel
- Colour pinstripe/Printer
- Compare sorting algorithms' performance
- 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
- Continued fraction/Arithmetic/G(matrix ng, continued fraction n)
- Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)
- Convex hull
- Conway's Game of Life
- Create an object at a given address
- Cut a rectangle
- Cycles of a permutation
- Cyclotomic polynomial
D
- De Bruijn sequences
- De Polignac numbers
- Death Star
- Deconvolution/1D
- Deconvolution/2D+
- Delegates
- Determine if only one instance is running
- Determine if two triangles overlap
- Dijkstra's algorithm
- Dining philosophers
- Discordian date
- Display an outline as a nested table
- Distance and Bearing
- Distribution of 0 digits in factorial series
- Dominoes
- Doubly-linked list/Definition
- Doubly-linked list/Element insertion
- Doubly-linked list/Traversal
- Draw a clock
- Draw a rotating cube
E
- Earliest difference between prime gaps
- Eertree
- Elementary cellular automaton/Infinite length
- Elementary cellular automaton/Random number generator
- Elliptic Curve Digital Signature Algorithm
- Elliptic curve arithmetic
- Equal prime and composite sums
- Erdős-Nicolas numbers
- Euclid-Mullin sequence
- Euclidean rhythm
- Euler's constant 0.5772...
- Events
- Execute Computer/Zero
- Execute a Markov algorithm
F
- FTP
- Faces from a mesh
- Factorial primes
- Factorize string into Lyndon words
- Fermat pseudoprimes
- Find duplicate files
- Find largest left truncatable prime in a given base
- Fixed length records
- Flipping bits game
- Flow-control structures
- Floyd-Warshall algorithm
- Formal power series
- Four bit adder
- Four is the number of letters in the ...
- Fractal tree
- Fraction reduction
- French Republican calendar
- Function prototype
- Functional coverage tree
G
- GSTrans string conversion
- GUI component interaction
- GUI enabling/disabling of controls
- GUI/Maximum window dimensions
- Gaussian elimination
- Gaussian primes
- Giuga numbers
- Go Fish
- Goldbach's comet
- Golden ratio/Convergence
- Gotchas
- Graph colouring
- Greatest prime dividing the n-th cubefree number
- Greyscale bars/Display
H
- HTTPS
- HTTPS/Authenticated
- HTTPS/Client-authenticated
- Handle a signal
- Hash join
- Hashtron inference
- Hello world/Web server
- Honeycombs
- Hough transform
- Hunt the Wumpus
I
- I'm a software engineer, get me out of here
- Idoneal numbers
- Image convolution
- Imaginary base numbers
- Inconsummate numbers in base 10
- Increasing gaps between consecutive Niven numbers
- Index finite lists of positive integers
J
K
- K-d tree
- K-means++ clustering
- 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
- Knight's tour
- Knuth's algorithm S
- Knuth's power tree
- Kolakoski sequence
- Kosaraju
L
- LU decomposition
- LZW compression
- Langton's ant
- Last letter-first letter
- Latin Squares in reduced form
- Legendre prime counting function
- Levenshtein distance/Alignment
- List rooted trees
- Logistic curve fitting in epidemiology
- Longest increasing subsequence
- Longest string challenge
- Lucky and even lucky numbers
- Lychrel numbers
- Lyndon word
M
- MD4
- MD5/Implementation
- Machine code
- Magic squares of singly even order
- Main step of GOST 28147-89
- Man or boy test
- Mastermind
- Matrix chain multiplication
- Matrix digital rain
- Mayan calendar
- Maze generation
- Maze solving
- Median filter
- Meissel–Mertens constant
- Memory layout of a data structure
- Merge and aggregate datasets
- Metaprogramming
- Miller–Rabin primality test
- Minesweeper game
- Minimal steps down to 1
- Minimum multiple of m where digital sum equals m
- Monty Hall problem
- Multiple regression
- Musical scale
N
- Narcissist
- Natural sorting
- Nautical bell
- Non-continuous subsequences
- Nonoblock
- 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
- Numerical integration/Gauss-Legendre Quadrature
O
- O'Halloran numbers
- OLE automation
- One-time pad
- OpenWebNet password
- Ordered partitions
- Ormiston triples
- Own digits power sum
P
- P-Adic numbers, basic
- P-Adic square roots
- P-value correction
- Pan base non-primes
- Pancake numbers
- Paraffins
- Parallel brute force
- Parameterized SQL statement
- Parse an IP Address
- Parsing/RPN to infix conversion
- Parsing/Shunting-yard algorithm
- Particle fountain
- Peaceful chess queen armies
- Pell numbers
- Pentagram
- Pentomino tiling
- Percentage difference between images
- Percolation/Bond percolation
- Periodic table
- Peripheral drift illusion
- Permutation test
- Permutations by swapping
- Permutations/Rank of a permutation
- Pig the dice game
- Pig the dice game/Player
- Pinstripe/Display
- Pinstripe/Printer
- Plasma effect
- Play recorded sounds
- Playfair cipher
- Pointers and references
- Polynomial regression
- Polyspiral
- Prime numbers whose neighboring pairs are tetraprimes
- Prime triangle
- Primes - allocate descendants to their ancestors
- Primes: n*2^m+1
- Problem of Apollonius
- Pythagoras tree
- Pythagorean quadruples
Q
R
- RCRPG
- RSA code
- Radical of an integer
- Ramanujan primes/twins
- Ramanujan's constant
- Ramer-Douglas-Peucker line simplification
- Random sentence from book
- Rare numbers
- Rate counter
- Read a configuration file
- Recaman's sequence
- Record sound
- Remove lines from a file
- Rendezvous
- Repunit primes
- Resistor mesh
- Respond to an unknown method call
- Retrieve and search chat history
- Riordan numbers
- Roots of a function
- 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
S
- SOAP
- SQL-based authentication
- Safe addition
- Sailors, coconuts and a monkey problem
- Same fringe
- Scope modifiers
- Search in paragraph's text
- Secure temporary file
- Self numbers
- Set of real numbers
- Sierpinski pentagon
- Sieve of Pritchard
- Simple database
- Simple turtle graphics
- Simulate input/Keyboard
- Simulate input/Mouse
- Singular value decomposition
- Sisyphus sequence
- Smallest number k such that k+2^m is composite for all m less than k
- Smarandache-Wellin primes
- Snake
- Sokoban
- Soloway's recurring rainfall
- Solve a Hidato puzzle
- Solve a Holy Knight's tour
- Solve a Hopido puzzle
- Solve a Numbrix puzzle
- Sorensen–Dice coefficient
- Sort an outline at every level
- Sorting Algorithms/Circle Sort
- Sorting algorithms/Cocktail sort with shifting bounds
- Sorting algorithms/Comb sort
- Sorting algorithms/Counting sort
- Sorting algorithms/Heapsort
- Sorting algorithms/Pancake sort
- Sorting algorithms/Patience sort
- Sorting algorithms/Radix sort
- Sorting algorithms/Shell sort
- Sorting algorithms/Strand sort
- Special characters
- Special variables
- Speech synthesis
- Sphenic numbers
- Square form factorization
- Stable marriage problem
- State name puzzle
- Steffensen's method
- Straddling checkerboard
- Strassen's algorithm
- Stream merge
- Sub-unit squares
- Subleq
- Subtractive generator
- Sudoku
- Suffixation of decimal numbers
- Sum to 100
- Superellipse
- Superpermutation minimisation
- Sutherland-Hodgman polygon clipping
- Synchronous concurrency
T
- Table creation/Postal addresses
- Tarjan
- Taxicab numbers
- 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/Preserve screen
- Terminal control/Unicode output
- Text processing/1
- The sieve of Sundaram
- Thiele's interpolation formula
- Tic-tac-toe
- Tonelli-Shanks algorithm
- Topic variable
- Topological sort
- Total circles area
- Transliterate English text using the Greek alphabet
- Tree datastructures
- Tree from nesting levels
- Truncate a file
- Tupper's self-referential formula
- Twelve statements
- Two's complement
U
- URL parser
- UTF-8 encode and decode
- Ukkonen’s suffix tree construction
- Undulating numbers
- Unicode strings
- Universal Lambda Machine
- Universal Turing machine
- Unix/ls
- Untouchable numbers
- Update a configuration file
- Use another language to call a function
- User input/Graphical
V
- Variable size/Set
- Variable-length quantity
- Variadic fixed-point combinator
- Verhoeff algorithm
- Verify distribution uniformity/Chi-squared test
- Video display modes
- Vigenère cipher/Cryptanalysis
- Vogel's approximation method
- Voronoi diagram
W
- Wagstaff primes
- War card game
- Wasteful, equidigital and frugal numbers
- Window creation/X11
- Window management
- Wireworld
- Word ladder
- Word search
- Wordiff
- Wordle comparison
- World Cup group stage
- Worthwhile task shaving
- 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 Factor
1
3
A
- A* search algorithm
- ASCII control characters
- Addition chains
- Addition-chain exponentiation
- Anaprimes
- 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
- Base58Check encoding
- Bilinear interpolation
- Binary coded decimal
- Binomial transform
- Birthday problem
- Black box
- Blackjack strategy
- Boids
- Brace expansion using ranges
C
- CLI-based maze-game
- CORDIC
- CalmoSoft primes
- Card shuffles
- Carmichael lambda function
- Centroid of a set of N-dimensional points
- Chebyshev coefficients
- Checksumcolor
- Chess player
- Code segment unload
- Color separation
- Combinations with repetitions/Square digit chain
- Compiler/Preprocessor
- Compiler/Simple file inclusion pre processor
- Compiler/Verifying syntax
- Consistent overhead byte stuffing
- Continued fraction convergents
- Convert CSV records to TSV
- 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
- Decision tables
- Diophantine linear system solving
- Discrete Fourier transform
- Divide a rectangle into a number of unequal triangles
- Double Twin Primes
- Doubly-linked list/Element removal
E
- Eisenstein primes
- Elevator simulation
- Engel expansion
- English cardinal anagrams
- 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
- Extreme primes
F
- Factor-perfect numbers
- Fibonacci heap
- Fibonacci matrix-exponentiation
- Find URI in text
- Find first and last set bit of a long integer
- Find squares n where n+1 is prime
- Finite state machine
- Forbidden numbers
- Four sides of square
- Free polyominoes enumeration
G
- Generalised floating point addition
- Generalised floating point multiplication
- Geometric algebra
- Getting the number of decimal places
- Goodstein Sequence
- Gradient descent
H
I
- IPC via named pipe
- IRC gateway
- Iccanobif primes
- Implicit type conversion
- Inner classes
- Integer long division
- Inventory sequence
- Iterators
J
K
L
- L-system
- Lagrange Interpolation
- Largest palindrome product
- 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
- Line circle intersection
- Linux CPU utilization
- Longest palindromic substrings
- Lucas-Carmichael numbers
M
- Magic numbers
- Make a backup file
- Marching squares
- Morpion solitaire
- Most frequent k chars distance
- Multidimensional Newton-Raphson method
- Multiplicatively perfect numbers
- Multiton
N
O
P
- Parse EBNF
- Parse command-line arguments
- Particle swarm optimization
- Penholodigital squares
- Penrose tiling
- Perceptron
- Permutations with repetitions
- Polynomial synthetic division
- Posit numbers/decoding
- Posit numbers/encoding
- Powerful numbers
- Practical numbers
- Price list behind API
- Prime reciprocal sum
- Print debugging statement
- Print itself
- Process SMIL directives in XML data
- Proof
- Protecting Memory Secrets
R
- Railway circuit
- 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
- Rice coding
- Robots
- 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 mode
- Sanitize user input
- 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
- 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
- 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 the letters of string in alphabetical order
- Sorting algorithms/Cycle sort
- Sorting algorithms/Tree sort on a linked list
- Special pythagorean triplet
- Spoof game
- Square root by hand
- Starting a web browser
- Statistics/Chi-squared distribution
- Sturmian word
- Subset sum problem
- Suffix tree
- Sunflower fractal
- 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
- Tetris
- Text to HTML
- The ISAAC cipher
- Three word location
- Time-based one-time password algorithm
- Topological sort/Extracted top item
- Transportation problem
- Triangular numbers
U
- URL shortener
- Ulam numbers
- Unicode polynomial equation
- Unit testing
- Uno (card game)
- Untrusted environment
- Upside-down numbers
- Use a REST API
- 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
- Wolstenholme numbers
- Word break problem
X
Tasks omitted from Factor
A
C
M
P
End of List
Again, feel free to try your hand at any of the tasks listed on this page.