Tasks not implemented in RPL
Awareness
If RPL is a language you like, or are interested in, please inform your fellow members of the RPL community; this page can't be emptied without your and their participation.
If RPL is a language you like, or are interested in, please inform your fellow members of the RPL community; this page can't be emptied without your and their participation.
Tasks not implemented in RPL
1
2
4
9
A
- ADFGVX cipher
- ASCII art diagram converter
- AVL tree
- Abbreviations, automatic
- Abbreviations, easy
- Abbreviations, simple
- Abelian sandpile model/Identity
- Abstract type
- Active Directory/Connect
- Active Directory/Search for a user
- Active object
- Add a variable to a class instance at runtime
- Address of a variable
- Algebraic data types
- Align columns
- Amb
- Anadromes
- Anagram generator
- Anagrams
- Anagrams/Deranged anagrams
- Anaprimes
- Angles (geometric), normalization and conversion
- Animate a pendulum
- Animated Spinners
- Animation
- Append a record to the end of a text file
- Apéry's constant
- Arbitrary-precision integers (included)
- Arena storage pool
- Arithmetic/Rational
- Associative array/Creation
- Associative array/Iteration
- Associative array/Merging
- Atomic updates
- Autogram checker
- Averages/Simple moving average
B
- Babylonian spiral
- Barnsley fern
- Bernstein basis polynomials
- Best shuffle
- Bioinformatics/Global alignment
- Bioinformatics/Sequence mutation
- Biorhythms
- Bitcoin/address validation
- Bitcoin/public point to address
- Bitmap
- Bitmap/Bresenham's line algorithm
- Bitmap/Bézier curves/Cubic
- 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
- Boustrophedon transform
- Boyer-Moore string search
- Brace expansion
- Break OO privacy
- Bron–Kerbosch algorithm
- Brownian tree
- Bulls and cows/Player
- Bézier curves/Intersections
C
- CSV data manipulation
- CSV to HTML translation
- Calendar - for "REAL" programmers
- Call a foreign-language function
- Call a function
- Call an object method
- Canny edge detector
- Cantor set
- Catmull–Clark subdivision surface
- Centre and radius of a circle passing through 3 points in a plane
- Chaocipher
- Chaos game
- Chat server
- Check if a polygon overlaps with a rectangle
- Check if two polygons overlap
- Check input device is a terminal
- Check output device is a terminal
- Checkpoint synchronization
- Chernick's Carmichael numbers
- Cheryl's birthday
- Cholesky decomposition
- Chowla numbers
- Church numerals
- Circles of given radius through two points
- Cistercian numerals
- Classes
- Closures/Value capture
- Collections
- Color quantization
- Color wheel
- Colour bars/Display
- Colour pinstripe/Display
- Colour pinstripe/Printer
- Combinations with repetitions
- Command-line arguments
- Commatizing numbers
- Compare sorting algorithms' performance
- Compile-time calculation
- Compiler/AST interpreter
- Compiler/Simple file inclusion pre processor
- Compiler/code generator
- Compiler/lexical analyzer
- Compiler/syntax analyzer
- Compiler/virtual machine interpreter
- Compound data type
- Concurrent computing
- Consecutive primes with ascending or descending differences
- Constrained genericity
- 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
- Copy stdin to stdout
- Create a file
- Create a file on magnetic tape
- Create a two-dimensional array at runtime
- Create an HTML table
- Create an object at a given address
- Cut a rectangle
- Cycles of a permutation
- Cyclops numbers
- Cyclotomic polynomial
D
- DNS query
- Dating agency
- De Bruijn sequences
- Death Star
- Deconvolution/2D+
- Deepcopy
- Define a primitive data type
- Delegates
- Deming's funnel
- Determine if a string is squeezable
- Determine if only one instance is running
- Determine if two triangles overlap
- Dice game probabilities
- Dijkstra's algorithm
- Dining philosophers
- Display an outline as a nested table
- Distance and Bearing
- Distributed programming
- Distribution of 0 digits in factorial series
- Documentation
- Dominoes
- Doubly-linked list/Definition
- Doubly-linked list/Element definition
- Doubly-linked list/Element insertion
- Doubly-linked list/Traversal
- Dragon curve
- Draw a clock
- Draw a cuboid
- Draw a rotating cube
- Draw a sphere
- Dutch national flag problem
E
- Earliest difference between prime gaps
- Echo server
- Eertree
- Egyptian division
- Element-wise operations
- Elementary cellular automaton
- Elementary cellular automaton/Infinite length
- Elementary cellular automaton/Random number generator
- Elliptic Curve Digital Signature Algorithm
- Elliptic curve arithmetic
- Enforced immutability
- Engel expansion
- Entropy/Narcissist
- Enumerations
- Environment variables
- Equal prime and composite sums
- Erdős-Nicolas numbers
- Euler's sum of powers conjecture
- Events
- Exceptions/Catch an exception thrown in a nested call
- Executable library
- Execute HQ9+
- Execute SNUSP
- Execute a Markov algorithm
- Execute a system command
- Extensible prime generator
- Extreme floating point values
F
- FASTA format
- FTP
- Faces from a mesh
- Factorial base numbers indexing permutations of a collection
- Fast Fourier transform
- Faulhaber's triangle
- Fermat pseudoprimes
- Fibonacci word
- Fibonacci word/fractal
- File extension is in extensions list
- File input/output
- File modification time
- File size
- File size distribution
- Find Chess960 starting position identifier
- Find duplicate files
- Find largest left truncatable prime in a given base
- Find palindromic numbers in both binary and ternary bases
- Find the missing permutation
- First class environments
- First-class functions
- First-class functions/Use numbers analogously
- Fixed length records
- Flipping bits game
- Flow-control structures
- Floyd-Warshall algorithm
- Forest fire
- Fork
- Formal power series
- Fortunate numbers
- Four is magic
- 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
- Galton box animation
- Gauss-Jordan matrix inversion
- Gaussian elimination
- General FizzBuzz
- Generator/Exponential
- Get system command output
- Globally replace text in several files
- Go Fish
- Gotchas
- Graph colouring
- Grayscale image
- Greyscale bars/Display
- Guess the number/With feedback
- Guess the number/With feedback (player)
H
- HTTP
- HTTPS
- HTTPS/Authenticated
- HTTPS/Client-authenticated
- Halt and catch fire
- Handle a signal
- Harriss Spiral
- Hash join
- Hashtron inference
- Hello world/Newline omission
- Hello world/Web server
- Hex dump
- Hickerson series of almost integers
- Higher-order functions
- Hilbert curve
- Hofstadter-Conway $10,000 sequence
- Holidays related to Easter
- Honeycombs
- Horizontal sundial calculations
- Horse racing
- Host introspection
- Hostname
- Hough transform
- Huffman coding
- Hunt the Wumpus
I
- I before E except after C
- I'm a software engineer, get me out of here
- IBAN
- Image convolution
- Imaginary base numbers
- Include a file
- Index finite lists of positive integers
- Inheritance/Multiple
- Inheritance/Single
- Inner classes
- Input loop
- Intersecting number wheels
- Inverted index
- Isograms and heterograms
J
- JSON
- JSON pointer
- Jaro similarity
- Jaro-Winkler distance
- Jordan-Pólya numbers
- JortSort
- Joystick position
- Julia set
- Jump anywhere
K
- K-d tree
- K-means++ clustering
- Kernighans large earthquake problem
- Keyboard input/Flush the keyboard buffer
- Keyboard macros
- Klarner-Rado sequence
- Knapsack problem/0-1
- Knapsack problem/Bounded
- Knapsack problem/Continuous
- Knapsack problem/Unbounded
- Knight's tour
- Knuth's power tree
- Koch curve
- Kolakoski sequence
- Kosaraju
- Kronecker product based fractals
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 comprehensions
- List rooted trees
- Literals/String
- Logistic curve fitting in epidemiology
- Longest common subsequence
- Longest common substring
- Longest increasing subsequence
- Ludic numbers
M
- MAC vendor lookup
- MD4
- MD5
- MD5/Implementation
- Machine code
- Mad Libs
- Magic numbers
- Magic squares of doubly even order
- Magic squares of singly even order
- Make directory path
- Man or boy test
- Mastermind
- Matrix chain multiplication
- Matrix digital rain
- Mayan calendar
- Mayan numerals
- Maze generation
- Maze solving
- Median filter
- Memory allocation
- Memory layout of a data structure
- Merge and aggregate datasets
- Mertens function
- Metaprogramming
- Metered concurrency
- Miller–Rabin primality test
- Mind boggling card trick
- Minesweeper game
- Minimal steps down to 1
- Minimum positive multiple in base 10 using only 0 and 1
- Minkowski question-mark function
- Modified random distribution
- Modular arithmetic
- Monads/List monad
- Monads/Maybe monad
- Monads/Writer monad
- Monty Hall problem
- Mouse position
- Move-to-front algorithm
- Multi-base primes
- Multi-dimensional array
- Multiple regression
- Multiplication tables
- Multiplicative order
- Munching squares
- Mutex
N
- N-queens problem
- N-smooth numbers
- Named parameters
- Naming conventions
- Natural sorting
- Nautical bell
- Nested templated data
- Non-transitive dice
- Nonoblock
- Nonogram solver
- Null object
- Number names
- Number reversal game
- 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
- Numeric error propagation
- Numerical and alphabetical suffixes
- Numerical integration
- Numerical integration/Gauss-Legendre Quadrature
O
- OLE automation
- Object serialization
- Odd word problem
- Old lady swallowed a fly
- One of n lines in a file
- One-time pad
- OpenGL
- OpenWebNet password
- Operator precedence
- Optional parameters
- Order by pair comparisons
- Ordered partitions
- Ormiston triples
- Own digits power sum
P
- P-Adic numbers, basic
- P-Adic square roots
- P-value correction
- Palindromic gapful numbers
- Pancake numbers
- Paraffins
- Parallel brute force
- Parallel calculations
- Parameterized SQL statement
- Parametric polymorphism
- Parse an IP Address
- Particle fountain
- Partition an integer x into n primes
- Partition function P
- Pascal's triangle/Puzzle
- Pathological floating point problems
- Peaceful chess queen armies
- Peano curve
- Pell's equation
- Penney's game
- Pentagram
- Pentomino tiling
- Percentage difference between images
- Percolation/Bond percolation
- Percolation/Mean cluster density
- Percolation/Mean run density
- Percolation/Site percolation
- Perfect shuffle
- Periodic table
- Peripheral drift illusion
- Perlin noise
- Permutation test
- Permutations
- Permutations by swapping
- Permutations/Derangements
- Permutations/Rank of a permutation
- Phrase reversals
- Pierpont primes
- Pig the dice game
- Pig the dice game/Player
- Pinstripe/Display
- Pinstripe/Printer
- Plasma effect
- Play recorded sounds
- Playfair cipher
- Pointers and references
- Polymorphic copy
- Polymorphism
- Polyspiral
- Prime conspiracy
- Prime numbers whose neighboring pairs are tetraprimes
- Prime triangle
- Primes - allocate descendants to their ancestors
- Primorial numbers
- Priority queue
- Problem of Apollonius
- Program name
- Pseudo-random numbers/Combined recursive generator MRG32k3a
- Pseudo-random numbers/PCG32
- Pseudo-random numbers/Xorshift star
- Pythagoras tree
- Pythagorean quadruples
- Pythagorean triples
Q
R
- RCRPG
- RIPEMD-160
- RPG attributes generator
- RSA code
- Ramanujan primes/twins
- Ramanujan's constant
- Random number generator (included)
- Random sentence from book
- Ranking methods
- Rare numbers
- Rate counter
- Ray-casting algorithm
- Read a configuration file
- Read a file character by character/UTF8
- Read a file line by line
- Read a specific line from a file
- Read entire file
- Record sound
- Reflection/Get source
- Reflection/List methods
- Reflection/List properties
- Regular expressions
- Remove lines from a file
- Rendezvous
- Resistor mesh
- Respond to an unknown method call
- Retrieve and search chat history
- Rhonda numbers
- Roots of a function
- 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
- Round-robin tournament schedule
- Runge-Kutta method
- Runtime evaluation
S
- S-expressions
- SHA-1
- SHA-256
- SHA-256 Merkle tree
- SOAP
- SQL-based authentication
- Safe addition
- Safe primes and unsafe primes
- Sailors, coconuts and a monkey problem
- Same fringe
- Scope modifiers
- Scope/Function names and labels
- Sealed classes and methods
- Search a list of records
- Search in paragraph's text
- Secure temporary file
- Semordnilap
- Send an unknown method call
- Send email
- Sequence of primorial primes
- Sequence: nth number with exactly n divisors
- Set of real numbers
- Set puzzle
- Set, the card game
- Sexy primes
- Short-circuit evaluation
- Shortest common supersequence
- Show ASCII table
- Sierpinski arrowhead curve
- Sierpinski carpet
- Sierpinski pentagon
- Sierpinski square curve
- Sierpinski triangle
- Sierpinski triangle/Graphical
- Sieve of Pritchard
- Simple database
- Simple turtle graphics
- Simple windowed application
- Simulate input/Keyboard
- Simulate input/Mouse
- Singleton
- Singly-linked list/Element definition
- Singly-linked list/Element insertion
- Singly-linked list/Traversal
- Sleeping Beauty problem
- Snake
- 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
- Sorensen–Dice coefficient
- Sort a list of object identifiers
- Sort an array of composite structures
- Sort an outline at every level
- Sort stability
- Sort using a custom comparator
- Sorting Algorithms/Circle Sort
- Sorting algorithms/Bead sort
- Sorting algorithms/Cocktail sort with shifting bounds
- Sorting algorithms/Comb sort
- Sorting algorithms/Merge sort
- Sorting algorithms/Patience sort
- Sorting algorithms/Radix sort
- Sorting algorithms/Selection sort
- Sorting algorithms/Shell sort
- Sorting algorithms/Sleep sort
- Sorting algorithms/Strand sort
- Sparkline in unicode
- Special characters
- Special variables
- Speech synthesis
- Spelling of ordinal numbers
- Spinning rod animation/Text
- Square form factorization
- Stable marriage problem
- Stack traces
- Stair-climbing puzzle
- Start from a main routine
- State name puzzle
- Statistics/Normal distribution
- Steffensen's method
- Stem-and-leaf plot
- Straddling checkerboard
- Strassen's algorithm
- Stream merge
- String interpolation (included)
- Strip block comments
- Strong and weak primes
- Sudoku
- Suffixation of decimal numbers
- Sum and product puzzle
- Sum to 100
- Summarize and say sequence
- Super-Poulet numbers
- Super-d numbers
- Superellipse
- Superpermutation minimisation
- Sutherland-Hodgman polygon clipping
- Sync subtitles
- Synchronous concurrency
- Syntax highlighting using Mediawiki formatting
T
- Table creation/Postal addresses
- Tarjan
- Teacup rim text
- 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 a function
- Test integerness
- Text processing/1
- Text processing/2
- Text processing/Max licenses in use
- Textonyms
- The Name Game
- The Twelve Days of Christmas
- The sieve of Sundaram
- Thiele's interpolation formula
- Tic-tac-toe
- Tokenize a string with escaping
- Tonelli-Shanks algorithm
- Top rank per group
- Topic variable
- Topological sort
- Topswops
- Total circles area
- Transliterate English text using the Greek alphabet
- Tree datastructures
- Tree from nesting levels
- Tree traversal
- Truncate a file
- Truth table
- Tupper's self-referential formula
- Twelve statements
- Twin primes whose sum is square number
- Two bullet roulette
U
- UPC
- URL decoding
- URL encoding
- URL parser
- UTF-8 encode and decode
- Ukkonen’s suffix tree construction
- Ulam spiral (for primes)
- Ultra useful primes
- Undefined values
- Unicode strings
- Unicode variable names
- Universal Lambda Machine
- Universal Turing machine
- Unprimeable numbers
- Untouchable numbers
- Update a configuration file
- Use another language to call a function
- User input/Graphical
V
- Variable declaration reset
- Variable size/Set
- Variadic fixed-point combinator
- Verhoeff algorithm
- Verify distribution uniformity/Chi-squared test
- Video display modes
- Vigenère cipher/Cryptanalysis
- Visualize a tree
- Vogel's approximation method
- Voronoi diagram
W
- Walk a directory/Recursively
- War card game
- Web scraping
- Window creation
- Window creation/X11
- Window management
- Word frequency
- Word ladder
- Word search
- Word wheel
- Word wrap
- Wordiff
- Wordle comparison
- World Cup group stage
- Worthwhile task shaving
- Write entire file
- Write language name in 3D ASCII
- Write to Windows event log
X
Y
Z
- Zebra puzzle
- Zeckendorf arithmetic
- Zhang-Suen thinning algorithm
- Zsigmondy numbers
- Zumkeller numbers
Draft tasks not implemented in RPL
1
3
A
- A* search algorithm
- Addition chains
- Addition-chain exponentiation
- Alternade words
- Arithmetic coding/As a generalized change of radix
- Aspect oriented programming
- Assertions in design by contract
- Audio alarm
- Audio frequency generator
- Audio overlap loop
B
- B-spline
- Bacon cipher
- Banker's algorithm
- Bilinear interpolation
- Bioinformatics/Subsequence
- Birthday problem
- Black box
- Blackjack strategy
- Boids
- Brace expansion using ranges
- Brzozowski algebraic method
C
- CLI-based maze-game
- CalmoSoft primes
- Card shuffles
- Carmichael lambda function
- Centroid of a set of N-dimensional points
- Chebyshev coefficients
- Checksumcolor
- Chemical calculator
- Chess player
- Cipolla's algorithm
- Code segment unload
- Color separation
- Combinations with repetitions/Square digit chain
- Compiler/Preprocessor
- 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
D
- Data Encryption Standard
- Decision tables
- Diophantine linear system solving
- Discrete Fourier transform
- Distinct palindromes within decimal numbers
- Divide a rectangle into a number of unequal triangles
- 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
- Execute CopyPasta Language
- Exponential digital sums
- Extended Straddling Checkerboard
- External sort
- Extract file extension
F
- Factor-perfect numbers
- Fibonacci heap
- Fibonacci matrix-exponentiation
- Find URI in text
- Find adjacent primes which differ by a square integer
- Find words with alternating vowels and consonants
- Finite state machine
- Free polyominoes enumeration
G
- Generalised floating point addition
- Generalised floating point multiplication
- Geometric algebra
- Goodstein Sequence
- Gradient descent
- Greed
H
I
J
K
L
- Largest product in a grid
- Latin Squares in reduced form/Randomizing using Jacobson and Matthews' technique
- Launch rocket with countdown and acceleration in stdout
- Line circle intersection
- Linux CPU utilization
- Longest common suffix
- Longest palindromic substrings
- Longest substrings without repeating characters
- Lucas-Carmichael numbers
M
- Make a backup file
- Marching squares
- Markov chain text generator
- McNaughton-Yamada-Thompson algorithm
- Minimum number of cells after, before, above and below NxN squares
- Modulinos
- Montgomery reduction
- Morpion solitaire
- Most frequent k chars distance
- Multidimensional Newton-Raphson method
- Multiline shebang
- Multiton
N
- N-body problem
- N-queens minimum and knights and bishops
- NYSIIS
- Names to numbers
- Native shebang
- Nimber arithmetic
- Number triplets game
- Numbers whose binary and ternary digit sums are prime
- Numeric separator syntax
- Numerical integration/Adaptive Simpson's method
O
P
- Palindromic primes in base 16
- Parse EBNF
- Parse command-line arguments
- Particle swarm optimization
- Penrose tiling
- Perceptron
- Permutations with repetitions
- Permuted multiples
- Pollard's rho algorithm
- Polynomial synthetic division
- Posit numbers/decoding
- Posit numbers/encoding
- Powerful numbers
- Price list behind API
- Prime words
- Primes with digits in nondecreasing order
- Print debugging statement
- Print itself
- Process SMIL directives in XML data
- Proof
- Protecting Memory Secrets
- Pseudorandom number generator image
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 gender of a string
- Reverse the order of lines in a text file while preserving the contents of each line
- Robots
- 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
- Segmentation fault protection
- Selection bias in clinical sciences
- Selective file copy
- Self-hosting compiler
- 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
- Snake and ladder
- Solve a Rubik's cube
- Solve equations with substitution method
- Solve triangle solitaire puzzle
- Solving coin problems
- 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
- Sum data type
- Sum of square and cube digits of an integer are 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 completion
- Text to HTML
- The ISAAC cipher
- Time conventions and conversions
- Time-based one-time password algorithm
- Topological sort/Extracted top item
- Transportation problem
- Type detection
U
- URL shortener
- Ulam numbers
- Unicode polynomial equation
- 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
X
Tasks omitted from RPL
End of List
Again, feel free to try your hand at any of the tasks listed on this page.