# Reports:Tasks not implemented in Clojure

**Awareness**

If

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## Contents

## Not implemented[edit]

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

### 2

### A

- ASCII art diagram converter
- AVL tree
- Abbreviations, automatic
- Abbreviations, easy
- Abbreviations, simple
- Abelian sandpile model
- Abelian sandpile model/Identity
- Abundant odd numbers
- Aliquot sequence classifications
- Angles (geometric), normalization and conversion
- Anti-primes
- Append a record to the end of a text file
- Apply a digital filter (direct form II transposed)
- Approximate equality
- Attractive numbers
- Averages/Mean time of day

### B

- Balanced ternary
- Barnsley fern
- Bell numbers
- Bin given limits
- Binary strings
- Bioinformatics/Sequence mutation
- Bioinformatics/base count
- Biorhythms
- Bitcoin/address validation
- Bitcoin/public point to address
- Bitmap/Bézier curves/Cubic
- Bitmap/Bézier curves/Quadratic
- Bitmap/Flood fill
- Bitmap/Histogram
- 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
- Brazilian numbers
- Brownian tree
- Bulls and cows/Player
- Burrows–Wheeler transform

### C

- Calendar
- Calkin-Wilf sequence
- Call a function in a shared library
- Canny edge detector
- Canonicalize CIDR
- Cantor set
- Casting out nines
- Catalan numbers/Pascal's triangle
- Catmull–Clark subdivision surface
- Chaocipher
- Chaos game
- Chat server
- Check output device is a terminal
- Chernick's Carmichael numbers
- Cheryl's birthday
- Chowla numbers
- Circles of given radius through two points
- Circular primes
- Cistercian numerals
- Color quantization
- Color wheel
- Colour bars/Display
- Colour pinstripe/Display
- Colour pinstripe/Printer
- Combinations and permutations
- Commatizing numbers
- Compare sorting algorithms' performance
- Compiler/AST interpreter
- Compiler/code generator
- Compiler/lexical analyzer
- Compiler/syntax analyzer
- Compiler/virtual machine interpreter
- Conjugate transpose
- Convex hull
- Copy stdin to stdout
- Cramer's rule
- Cuban primes
- Cut a rectangle
- Cyclotomic polynomial

### D

- De Bruijn sequences
- Death Star
- Deconvolution/1D
- Deconvolution/2D+
- Deepcopy
- Deming's Funnel
- Determinant and permanent
- Determine if two triangles overlap
- Dice game probabilities
- Digital root/Multiplicative digital root
- Display a linear combination
- Display an outline as a nested table
- Distributed programming
- Dragon curve
- Draw a clock
- Draw a pixel
- Draw a rotating cube

### E

- EKG sequence convergence
- Eban numbers
- Eertree
- Egyptian division
- Egyptian fractions
- Elementary cellular automaton
- Elementary cellular automaton/Infinite length
- Elementary cellular automaton/Random Number Generator
- Elliptic Curve Digital Signature Algorithm
- Elliptic curve arithmetic
- Entropy/Narcissist
- Euler's identity
- Execute SNUSP
- Execute a Markov algorithm
- Exponentiation with infix operators in (or operating on) the base

### F

- FTP
- Faces from a mesh
- Factorial base numbers indexing permutations of a collection
- Factorions
- Fairshare between two and more
- Farey sequence
- Fast Fourier transform
- Faulhaber's formula
- Faulhaber's triangle
- Feigenbaum constant calculation
- Fermat numbers
- Fibonacci word/fractal
- File size distribution
- Find duplicate files
- Find largest left truncatable prime in a given base
- Find palindromic numbers in both binary and ternary bases
- Find the intersection of a line with a plane
- First perfect square in base n with n unique digits
- First power of 2 that has leading decimal digits of 12
- Fivenum
- Fixed length records
- Flow-control structures
- Floyd-Warshall algorithm
- Four is magic
- Four is the number of letters in the ...
- Fraction reduction
- Fractran
- French Republican calendar
- Function frequency
- Functional coverage tree
- Fusc sequence

### G

### H

### I

- ISBN13 check digit
- Idiomatically determine all the characters that can be used for symbols
- Idiomatically determine all the lowercase and uppercase letters
- Image convolution
- Image noise
- Imaginary base numbers
- Increasing gaps between consecutive Niven numbers
- Index finite lists of positive integers
- Intersecting number wheels
- Isqrt (integer square root) of X

### K

### L

- LU decomposition
- Lah numbers
- Largest proper divisor of n
- Latin Squares in reduced form
- Law of cosines - triples
- Leonardo numbers
- Levenshtein distance/Alignment
- List rooted trees
- Long literals, with continuations
- Long multiplication
- Long primes
- Longest common substring
- Loops/Increment loop index within loop body
- Loops/With multiple ranges
- Loops/Wrong ranges
- Lucky and even lucky numbers

### M

- MAC Vendor Lookup
- Machine code
- Magic squares of doubly even order
- Magic squares of odd order
- Magic squares of singly even order
- Main step of GOST 28147-89
- Mastermind
- Matrix-exponentiation operator
- Matrix chain multiplication
- Matrix digital rain
- Mayan numerals
- Median filter
- Merge and aggregate datasets
- Mertens function
- Metallic ratios
- Metered concurrency
- Metronome
- Mian-Chowla sequence
- Mind boggling card trick
- Minimal steps down to 1
- Minkowski question-mark function
- Modified random distribution
- Modular arithmetic
- Monads/Writer monad
- Multi-dimensional array
- Multiple regression
- Multisplit
- Munching squares
- Mutex

### N

- N-smooth numbers
- Narcissist
- Natural sorting
- Nautical bell
- Negative base numbers
- Nested templated data
- Next highest int from digits
- Nim game
- Nimber arithmetic
- Non-decimal radices/Convert
- Non-decimal radices/Input
- Non-transitive dice
- Nonoblock
- Nonogram solver
- Numeric error propagation
- Numerical and alphabetical suffixes
- Numerical integration
- Numerical integration/Gauss-Legendre Quadrature

### O

### P

- P-Adic numbers, basic
- P-Adic square roots
- P-value correction
- Padovan n-step number sequences
- Palindromic gapful numbers
- Pancake numbers
- Paraffins
- Parse an IP Address
- Parsing/RPN to infix conversion
- Parsing/Shunting-yard algorithm
- Partition an integer x into n primes
- Partition function P
- Peaceful chess queen armies
- Peano curve
- Pell's equation
- Pentagram
- Percentage difference between images
- Percolation/Bond percolation
- Percolation/Mean cluster density
- Percolation/Mean run density
- Percolation/Site percolation
- Perfect totient numbers
- Perlin noise
- Permutation test
- Permutations/Rank of a permutation
- Pierpont primes
- Pig the dice game/Player
- Pinstripe/Display
- Pinstripe/Printer
- Plasma effect
- Play recorded sounds
- Playfair cipher
- Polymorphic copy
- Polynomial regression
- Polyspiral
- Pragmatic directives
- Primality by Wilson's theorem
- Prime conspiracy
- Primes - allocate descendants to their ancestors
- Problem of Apollonius
- Pseudo-random numbers/Combined recursive generator MRG32k3a
- Pseudo-random numbers/PCG32
- Pseudo-random numbers/Xorshift star
- Pythagoras tree
- Pythagorean quadruples

### R

- RPG attributes generator
- RSA code
- Ramanujan's constant
- Ramer-Douglas-Peucker line simplification
- Random Latin squares
- Random number generator (device)
- Random sentence from book
- Ranking methods
- Rare numbers
- Rate counter
- Ray-casting algorithm
- Read a file character by character/UTF8
- Recaman's sequence
- Record sound
- Reduced row echelon form
- Reflection/List properties
- Rendezvous
- Resistor mesh
- Respond to an unknown method call
- Retrieve and search chat history
- Roots of unity
- Rosetta Code/Find bare lang tags
- Rosetta Code/Fix code tags
- Rosetta Code/Rank languages by number of users
- Rosetta Code/Rank languages by popularity
- Runge-Kutta method
- Runtime evaluation

### S

- S-expressions
- SHA-256 Merkle tree
- SQL-based authentication
- Safe addition
- Safe primes and unsafe primes
- Sailors, coconuts and a monkey problem
- Scope/Function names and labels
- Scope modifiers
- Self-describing numbers
- Self numbers
- Send an unknown method call
- Sequence: nth number with exactly n divisors
- Sequence: smallest number greater than previous term with exactly n divisors
- Sequence: smallest number with exactly n divisors
- Set puzzle
- Sexy primes
- Shoelace formula for polygonal area
- Shortest common supersequence
- Sierpinski pentagon
- Sierpinski triangle/Graphical
- Simple database
- Simulate input/Mouse
- Singleton
- Sleeping Beauty problem
- Smarandache prime-digital sequence
- 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 an outline at every level
- Sort three variables
- Sorting Algorithms/Circle Sort
- Sorting algorithms/Cocktail sort
- Sorting algorithms/Cocktail sort with shifting bounds
- Sorting algorithms/Comb sort
- Sorting algorithms/Counting sort
- Sorting algorithms/Radix sort
- Sorting algorithms/Shell sort
- Spinning rod animation/Text
- Square-free integers
- Square Form Factorization
- Square but not cube
- Stable marriage problem
- Statistics/Basic
- Statistics/Normal distribution
- Stirling numbers of the first kind
- Stirling numbers of the second kind
- Straddling checkerboard
- Stream merge
- Strong and weak primes
- Subleq
- Substitution cipher
- Successive prime differences
- Suffixation of decimal numbers
- Sum and product puzzle
- Sum to 100
- Sunflower fractal
- Superellipse
- Superpermutation minimisation
- Sutherland-Hodgman polygon clipping

### T

- Tarjan
- Tau function
- Tau number
- Teacup rim text
- Terminal control/Clear the screen
- Terminal control/Coloured text
- Terminal control/Cursor movement
- Terminal control/Cursor positioning
- Terminal control/Dimensions
- Terminal control/Hiding the cursor
- Terminal control/Inverse video
- Terminal control/Positional read
- Terminal control/Preserve screen
- Ternary logic
- Test integerness
- The ISAAC Cipher
- The Name Game
- Thiele's interpolation formula
- Thue-Morse
- Tic-tac-toe
- Tokenize a string with escaping
- Topswops
- Total circles area
- Totient function
- Trabb Pardo–Knuth algorithm
- Tree datastructures
- Tree from nesting levels

### U

### V

### 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 Clojure (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

- A* search algorithm
- ABC words
- Addition-chain exponentiation
- Addition chains
- Additive primes
- Air mass
- Almkvist-Giullera formula for pi
- 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

### C

- CLI-based maze-game
- Card shuffles
- Change e letters to i in words
- Changeable words
- Chebyshev coefficients
- Checksumcolor
- Chemical calculator
- Chess player
- Cipolla's algorithm
- Code segment unload
- Combinations with repetitions/Square digit chain
- Common list elements
- Common sorted list
- Compiler/Simple file inclusion pre processor
- Compiler/Verifying syntax
- Consecutive Primes With Ascending Or Descending Differences
- Continued fraction/Arithmetic/G(matrix ng, continued fraction n)
- Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)
- Coprime triplets
- Coprimes
- Count the coins/0-1
- Cousin primes
- Create an object/Native demonstration
- Cubic Special Primes
- Curve that touches three points
- Cycle detection

### D

- Data Encryption Standard
- Days between dates
- Decimal - Hexadecimal numbers
- Decimal floating point number to binary
- Decision tables
- Discrete Fourier transform
- Distinct Palindromes Within Decimal Numbers
- Distribution of 0 Digits in Factorial Series
- Doomsday rule
- Doubly-linked list/Element removal
- Draw pixel 2

### F

- Fibonacci heap
- Fibonacci matrix-exponentiation
- Find URI in text
- Find first and last set bit of a long integer
- Find first missing positive
- Find if a point is within a triangle
- Find prime n for that reversed n is also prime
- Find prime numbers of the form n*n*n+2
- Find words which contains all the vowels
- Find words which contains more than 3 e vowels
- Find words which contains most consonants
- Find words which first and last three letters are equals
- Find words with alternating vowels and consonants
- Finite state machine
- Free polyominoes enumeration
- Frobenius numbers

### G

### I

### L

- Latin Squares in reduced form/Randomizing using Jacobson and Matthews’ Technique
- Launch rocket with countdown and acceleration in stdout
- Length of an arc between two angles
- Line circle intersection
- Linux CPU utilization
- Logistic curve fitting in epidemiology
- Longest common prefix
- Longest common suffix
- Longest palindromic substrings
- Longest substrings without repeating characters

### M

### N

- N-body problem
- NYSIIS
- Names to numbers
- Native shebang
- Neighbour primes
- Next special primes
- Nice primes
- Numbers divisible by their individual digits, but not by the product of their digits.
- Numbers which binary and ternary digit sum are prime
- Numbers with equal rises and falls
- Numbers with prime digits whose sum is 13
- Numeric separator syntax
- Numerical integration/Adaptive Simpson's method

### P

- Palindromic primes
- Parse EBNF
- Particle swarm optimization
- Penrose tiling
- Pentomino tiling
- Perceptron
- Permutations with repetitions
- Permutations with some identical elements
- Piprimes
- Pisano period
- Polynomial synthetic division
- Powerful numbers
- Practical numbers
- Price list behind API
- Prime triplets
- Prime words
- Primes which 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
- Proof
- Pseudo-random numbers/Splitmix64
- 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
- Remove vowels from a string
- Resistance calculator
- Resistance network calculator
- Reverse the gender of a string
- Robots
- Rosetta Code/List authors of task descriptions
- Rosetta Code/Run examples
- Rosetta Code/Tasks without examples
- Run as a daemon or service

### S

- Safe mode
- Sattolo cycle
- Selective file copy
- Self-hosting compiler
- Separate the house number from the street name
- Shift list elements to left by 3
- Show the (decimal) value of a number of 1s appended with a 3, then squared
- Sierpinski arrowhead curve
- Sierpinski curve
- Sierpinski square curve
- Simulated annealing
- Sine wave
- Singly-linked list/Element removal
- Smallest enclosing circle problem
- Smallest numbers
- Smallest power of 6 whose decimal expansion contains n
- Smallest square that begins with n
- Snake
- Snake and Ladder
- Solve a Rubik's Cube
- 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
- Square root by hand
- Starting a web browser
- Strange numbers
- Strange plus numbers
- Strange unique prime triplets
- Strassen's algorithm
- Subset sum problem
- Substring primes
- Suffix tree
- Sum data type
- Sum of divisors
- Sum of first n cubes
- Sum of the digits of n is substring of n
- Summarize primes
- Sylvester's sequence

### 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
- Triplet of three numbers
- Twin primes
- Two bullet roulette
- Two identical strings
- Two sum
- Type detection

### U

### W

## Requiring Attention[edit]

### Examples[edit]

These tasks have implementations in Clojure, 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 Clojure 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 Clojure was inappropriate for these tasks, or implementations of them would be unenlightening. Feel free to try your hand at them anyway.

### A

### C

## End of List[edit]

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