# Reports:Tasks not implemented in F Sharp

**Awareness**

If

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## Contents

## Not implemented[edit]

These are currently not implemented in F Sharp. Please implement some if you can. If any tasks are not possible or too complex in F Sharp, they should not be on this list. To mark a task as such, add **{{omit from|F Sharp}}**, preserving the capitalization of the language, to that task. It will appear below under the "Not Considered" section.

### A

- AKS test for primes
- ASCII art diagram converter
- AVL tree
- Abbreviations, easy
- Abbreviations, simple
- Active Directory/Search for a user
- Address of a variable
- Aliquot sequence classifications
- Angles (geometric), normalization and conversion
- Append a record to the end of a text file
- Apply a digital filter (direct form II transposed)
- Approximate equality
- Archimedean spiral
- Arena storage pool
- Arithmetic-geometric mean/Calculate Pi

### B

- Balanced ternary
- Best shuffle
- Bin given limits
- Binary strings
- Bioinformatics/Sequence mutation
- Bioinformatics/base count
- Biorhythms
- Bitcoin/address validation
- Bitcoin/public point to address
- 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
- Brace expansion
- Brownian tree
- Bulls and cows/Player
- Burrows–Wheeler transform

### C

- Calendar - for "REAL" programmers
- Call a foreign-language function
- Call a function in a shared library
- Call an object method
- Canny edge detector
- Canonicalize CIDR
- Cantor set
- Casting out nines
- Catmull–Clark subdivision surface
- Chat server
- Check Machin-like formulas
- Check input device is a terminal
- Check output device is a terminal
- Checkpoint synchronization
- Chowla numbers
- Collections
- Color quantization
- Color wheel
- Colour bars/Display
- Colour pinstripe/Display
- Colour pinstripe/Printer
- Combinations and permutations
- Combinations with repetitions
- Commatizing numbers
- Compare length of two strings
- Compare sorting algorithms' performance
- Compile-time calculation
- Compiler/AST interpreter
- Compiler/code generator
- Compiler/lexical analyzer
- Compiler/syntax analyzer
- Compiler/virtual machine interpreter
- Conditional structures
- Convert decimal number to rational
- Cramer's rule
- Create a file on magnetic tape
- Create an object at a given address
- Cumulative standard deviation
- Cut a rectangle
- Cyclotomic polynomial

### D

- DNS query
- De Bruijn sequences
- Death Star
- Deconvolution/1D
- Deconvolution/2D+
- Deepcopy
- Define a primitive data type
- Deming's Funnel
- Determinant and permanent
- Determine if only one instance is running
- Determine sentence type
- Dice game probabilities
- Display an outline as a nested table
- Distributed programming
- Diversity prediction theorem
- Documentation
- Doubly-linked list/Element insertion
- Draw a cuboid
- Draw a rotating cube
- Draw a sphere
- Dynamic variable names

### E

- Eban numbers
- Eertree
- Egyptian fractions
- Element-wise operations
- Elementary cellular automaton/Infinite length
- Elliptic Curve Digital Signature Algorithm
- Elliptic curve arithmetic
- Entropy/Narcissist
- Equilibrium index
- Euler's constant 0.5772...
- Exceptions
- Exceptions/Catch an exception thrown in a nested call
- Executable library
- Execute HQ9+
- Exponentiation order

### F

- FASTA format
- FTP
- Faces from a mesh
- Factors of a Mersenne number
- Fairshare between two and more
- Farey sequence
- Fast Fourier transform
- Faulhaber's formula
- Fermat numbers
- File extension is in extensions list
- File size distribution
- Find Chess960 starting position identifier
- Find duplicate files
- Find if a point is within a triangle
- Find the missing permutation
- First class environments
- Fixed length records
- Flipping bits game
- Flow-control structures
- Fork
- Formal power series
- Fortunate numbers
- Four is the number of letters in the ...
- Fraction reduction
- Fractran
- Function frequency
- Functional coverage tree

### G

- GUI/Maximum window dimensions
- GUI enabling/disabling of controls
- Galton box animation
- Gapful numbers
- Gauss-Jordan matrix inversion
- General FizzBuzz
- Generate Chess960 starting position
- Generate random chess position
- Go Fish
- Graph colouring
- Grayscale image
- Greyscale bars/Display
- Guess the number
- Guess the number/With feedback (player)

### H

### I

### K

### L

- LU decomposition
- LZW compression
- Lah numbers
- Largest number divisible by its digits
- Last Friday of each month
- Last letter-first letter
- Law of cosines - triples
- Legendre prime counting function
- Levenshtein distance/Alignment
- List rooted trees
- Literals/Floating point
- Literals/String
- Long literals, with continuations
- Long year
- Longest common substring
- Longest increasing subsequence
- Longest string challenge
- Loops/With multiple ranges
- Loops/Wrong ranges
- Ludic numbers
- Lychrel numbers

### M

- MAC Vendor Lookup
- MD4
- Machine code
- Mad Libs
- Magic 8-ball
- Magic squares of doubly even order
- Magic squares of odd order
- Magic squares of singly even order
- Main step of GOST 28147-89
- Map range
- Mastermind
- Matrix-exponentiation operator
- Matrix chain multiplication
- Matrix digital rain
- Maximum triangle path sum
- Mayan calendar
- Maze solving
- Median filter
- Memory allocation
- Memory layout of a data structure
- Metaprogramming
- Metered concurrency
- Middle three digits
- Minesweeper game
- Minimal steps down to 1
- Minkowski question-mark function
- Modified random distribution
- Modular arithmetic
- Monads/Writer monad
- Multi-dimensional array
- Multiple regression
- Multiplicative order
- Munching squares
- Musical scale
- Mutex

### N

- N-smooth numbers
- Named parameters
- Naming conventions
- Narcissist
- Natural sorting
- Nautical bell
- Nested function
- Nested templated data
- Next highest int from digits
- Nim game
- Nimber arithmetic
- Non-decimal radices/Convert
- Nonoblock
- Numerical and alphabetical suffixes
- Numerical integration/Gauss-Legendre Quadrature

### O

### P

- P-Adic numbers, basic
- P-Adic square roots
- P-value correction
- Padovan sequence
- Paraffins
- Pascal matrix generation
- Pathological floating point problems
- Peaceful chess queen armies
- Peano curve
- Pell's equation
- Penney's game
- Pentagram
- Pentomino tiling
- Percolation/Bond percolation
- Percolation/Mean cluster density
- Percolation/Mean run density
- Percolation/Site percolation
- Perfect totient numbers
- Peripheral drift illusion
- Perlin noise
- Permutation test
- Permutations/Rank of a permutation
- Phrase reversals
- Pig the dice game
- Pig the dice game/Player
- Pinstripe/Display
- Pinstripe/Printer
- Pisano period
- Plasma effect
- Play recorded sounds
- Playfair cipher
- Playing cards
- Pointers and references
- Polynomial long division
- Polynomial regression
- Polyspiral
- Pragmatic directives
- Primes - allocate descendants to their ancestors
- Probabilistic choice
- Pseudo-random numbers/Combined recursive generator MRG32k3a
- Pythagorean quadruples

### R

- RCRPG
- RIPEMD-160
- RPG attributes generator
- Ramanujan's constant
- Ramer-Douglas-Peucker line simplification
- Random number generator (device)
- Random number generator (included)
- Random sentence from book
- Range consolidation
- Ranking methods
- Rate counter
- Ray-casting algorithm
- Read a configuration file
- Read a file character by character/UTF8
- Recaman's sequence
- Record sound
- Reduced row echelon form
- Reflection/Get source
- Reflection/List methods
- Reflection/List properties
- Resistor mesh
- Roots of a function
- Roots of a quadratic function
- Roots of unity
- Rosetta Code/Find bare lang tags
- Rosetta Code/Find unimplemented tasks
- Rosetta Code/Rank languages by number of users
- Runtime evaluation
- Runtime evaluation/In an environment

### S

- SHA-256 Merkle tree
- SQL-based authentication
- Safe addition
- Sailors, coconuts and a monkey problem
- Same fringe
- Scope/Function names and labels
- Scope modifiers
- Search a list of records
- Secure temporary file
- Self-describing numbers
- Send an unknown method call
- Send email
- Sequence: nth number with exactly n divisors
- Sequence of primorial primes
- Seven-sided dice from five-sided dice
- Shortest common supersequence
- Show ASCII table
- Sierpinski arrowhead curve
- Sierpinski pentagon
- Sierpinski square curve
- Sierpinski triangle/Graphical
- Simple database
- Simulate input/Keyboard
- Simulate input/Mouse
- Singleton
- Singly-linked list/Element definition
- Singly-linked list/Element insertion
- Singly-linked list/Traversal
- 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
- Sort a list of object identifiers
- Sort an outline at every level
- Sort numbers lexicographically
- Sorting Algorithms/Circle Sort
- Sorting algorithms/Bogosort
- Sorting algorithms/Cocktail sort
- Sorting algorithms/Cocktail sort with shifting bounds
- Sorting algorithms/Comb sort
- Sorting algorithms/Counting sort
- Sorting algorithms/Patience sort
- Sorting algorithms/Permutation sort
- Sorting algorithms/Radix sort
- Sorting algorithms/Shell sort
- Sorting algorithms/Stooge sort
- Sorting algorithms/Strand sort
- Special characters
- Special variables
- Speech synthesis
- Spelling of ordinal numbers
- Spinning rod animation/Text
- Square-free integers
- Square form factorization
- Stair-climbing puzzle
- State name puzzle
- Statistics/Basic
- Statistics/Normal distribution
- Stirling numbers of the first kind
- Stirling numbers of the second kind
- Strassen's algorithm
- Stream merge
- Strong and weak primes
- Subleq
- Substitution cipher
- Suffixation of decimal numbers
- Sum and product puzzle
- Superellipse
- Superpermutation minimisation
- Sutherland-Hodgman polygon clipping

### T

- Table creation/Postal addresses
- Tarjan
- Taxicab numbers
- Terminal control/Cursor movement
- 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
- Ternary logic
- Test integerness
- Text processing/1
- Text processing/Max licenses in use
- Textonyms
- The ISAAC Cipher
- Thiele's interpolation formula
- Thue-Morse
- Tonelli-Shanks algorithm
- Topic variable
- Topological sort
- Topswops
- Total circles area
- Totient function
- Tree datastructures
- Tree from nesting levels
- Truncatable primes
- Truth table
- Twelve statements
- Two bullet roulette

### U

### V

- Validate International Securities Identification Number
- Vampire number
- Variable-length quantity
- Variable size/Get
- Variable size/Set
- Variadic function
- Verify distribution uniformity/Chi-squared test
- Verify distribution uniformity/Naive
- Video display modes
- Vigenère cipher/Cryptanalysis
- Vogel's approximation method
- Voronoi diagram

### W

### Draft tasks without implementation[edit]

These tasks are drafts, meaning they largely need more work to turn them into full tasks. Perhaps you can help by trying to implement them in F Sharp (after all, one of the key requirements for a task being non-draft is multiple implementations, preferably in widely different languages) but be aware that this may be difficult because of lack of definition of the task itself.

### A

### B

### C

- CLI-based maze-game
- Camel case and snake case
- Card shuffles
- Chebyshev coefficients
- Checksumcolor
- Chemical calculator
- Chess player
- Code Golf: Code Golf
- Code segment unload
- Combinations with repetitions/Square digit chain
- Compiler/Simple file inclusion pre processor
- Compiler/Verifying syntax
- Concatenate two primes is also prime
- Continued fraction/Arithmetic/G(matrix ng, continued fraction n)
- Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)
- Count the coins/0-1
- Create an object/Native demonstration
- Create your own text control codes
- Curve that touches three points
- Cycle detection

### D

- Dating agency
- Decimal floating point number to binary
- Decision tables
- Digit fifth powers
- Diophantine linear system solving
- Discrete Fourier transform
- Distinct Palindromes within decimal numbers
- Distribution of 0 Digits in factorial series
- Divide a rectangle into a number of unequal triangles
- Doomsday rule
- Doubly-linked list/Element removal
- Draw pixel 2

### E

### F

### G

### I

### L

### M

### N

### P

- Palindromic primes
- Pandigital prime
- Parse EBNF
- Parse command-line arguments
- Particle fountain
- Particle swarm optimization
- Penrose tiling
- Perceptron
- Permutations with repetitions
- Permutations with some identical elements
- Polynomial derivative
- Polynomial synthetic division
- Powerful numbers
- Practical numbers
- Price list behind API
- Prime triplets
- Prime words
- Print debugging statement
- Print itself
- Process SMIL directives in XML data
- Product of divisors
- Proof
- Pseudorandom number generator image

### R

- Railway circuit
- Ramsey's theorem
- Range modifications
- 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
- Rodrigues’ rotation formula
- Rosetta Code/List authors of task descriptions
- Rosetta Code/Run examples
- Rosetta Code/Tasks without examples
- Round-robin tournament schedule
- Run as a daemon or service

### S

- Safe and Sophie Germain primes
- Safe mode
- Sanitize user input
- Segmentation fault protection
- Selective file copy
- Self-hosting compiler
- Sierpinski curve
- Simple turtle graphics
- Simulated annealing
- Sine wave
- Singly-linked list/Element removal
- Smallest enclosing circle problem
- Smallest number k such that k+2^m is composite for all m less than k
- Snake and Ladder
- Solve a Rubik's Cube
- Solve equations with substitution method
- Solve triangle solitare puzzle
- Solving coin problems
- Sorting algorithms/Cycle sort
- Sorting algorithms/Tree sort on a linked list
- Special Divisors
- Special factorials
- Spoof game
- Starting a web browser
- Subset sum problem
- Substring primes
- Suffix tree
- Sum data type
- Sunflower fractal

### 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
- Three word location
- Time-based one-time password algorithm
- Topological sort/Extracted top item
- Transportation problem
- Tropical algebra overloading
- Type detection

### U

### W

## Requiring Attention[edit]

### Examples[edit]

These tasks have implementations in F Sharp, but somebody, somewhere, decided that the example implementation was faulty or in some other way requiring attention. If you're familiar with the task and language, please consider reviewing/correcting the example and removing the notice.

### No pages found.

### Other pages[edit]

These are other pages related to F Sharp which require attention; with your knowledge and assistance, we can improve the quality of the site's content.

### No pages found.

## Not Considered[edit]

These tasks are not generally counted toward "unimplemented", as somebody, somewhere, decided that F Sharp was inappropriate for these tasks, or implementations of them would be unenlightening. Feel free to try your hand at them anyway.

### A

### I

### J

### R

### S

## End of List[edit]

Again, feel free to try your hand at any of the tasks listed on this page.