# Reports:Tasks not implemented in Zkl

**Awareness**

If

**Zkl**is a language you like, or are interested in, please inform your fellow members of the Zkl community; this page can't be emptied without your and their participation.

## Contents

## Not implemented[edit]

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

### A

- ASCII art diagram converter
- AVL tree
- Abelian sandpile model
- Abelian sandpile model/Identity
- Achilles numbers
- Ackermann function
- Active Directory/Connect
- Active Directory/Search for a user
- Additive primes
- Algebraic data types
- Almkvist-Giullera formula for pi
- Animate a pendulum
- Animation
- Arithmetic-geometric mean/Calculate Pi
- Ascending primes

### C

- Calkin-Wilf sequence
- Canny edge detector
- Canonicalize CIDR
- Catmull–Clark subdivision surface
- Check Machin-like formulas
- Circular primes
- Cistercian numerals
- Color of a screen pixel
- Color quantization
- Colorful numbers
- Colour bars/Display
- Colour pinstripe/Display
- Colour pinstripe/Printer
- Combinations and permutations
- Commatizing numbers
- Compare length of two strings
- Compare sorting algorithms' performance
- Compiler/Preprocessor
- Compiler/lexical analyzer
- Compiler/syntax analyzer
- Composite numbers k with no single digit factors whose factors are all substrings of k
- Conjugate transpose
- Consecutive primes with ascending or descending differences
- Cullen and Woodall numbers
- Curzon numbers
- Cyclops numbers
- Cyclotomic polynomial

### D

### E

- Earliest difference between prime gaps
- Elliptic Curve Digital Signature Algorithm
- Equal prime and composite sums
- Erdös-Selfridge categorization of primes
- Esthetic numbers
- Euler's constant 0.5772...
- Execute SNUSP
- Exponentiation with infix operators in (or operating on) the base
- Extreme floating point values

### F

### G

### H

### I

### K

### L

### M

- MD4
- MD5/Implementation
- Machine code
- Magic constant
- Magnanimous numbers
- Matrix-exponentiation operator
- Memory layout of a data structure
- Merge and aggregate datasets
- Metronome
- Mian-Chowla sequence
- Minesweeper game
- Minimum multiple of m where digital sum equals m
- Minkowski question-mark function
- Modified random distribution
- Morse code
- Motzkin numbers
- Mouse position
- Multi-base primes
- Multi-dimensional array
- Musical scale

### N

### P

- P-Adic numbers, basic
- P-Adic square roots
- Padovan n-step number sequences
- Padovan sequence
- Pancake numbers
- Parameterized SQL statement
- Parse an IP Address
- Particle fountain
- Partition function P
- Pell numbers
- Peripheral drift illusion
- Pig the dice game/Player
- Pinstripe/Display
- Pinstripe/Printer
- Plasma effect
- Play recorded sounds
- Poker hand analyser
- Polymorphic copy
- Pragmatic directives
- Prime triangle
- Pseudo-random numbers/Combined recursive generator MRG32k3a
- Pseudo-random numbers/Middle-square method
- Pseudo-random numbers/PCG32
- Pseudo-random numbers/Splitmix64
- Pseudo-random numbers/Xorshift star

### R

### S

- S-expressions
- SHA-256 Merkle tree
- SOAP
- SQL-based authentication
- Safe addition
- Search in paragraph's text
- Self numbers
- Set right-adjacent bits
- Simple database
- Simple turtle graphics
- Simple windowed application
- Sleeping Beauty problem
- Smallest number k such that k+2^m is composite for all m less than k
- Snake
- Sokoban
- Solve a Holy Knight's tour
- Solve hanging lantern problem
- Sort an outline at every level
- Sorting algorithms/Cocktail sort with shifting bounds
- Soundex
- Square form factorization
- Strassen's algorithm
- Sum of elements below main diagonal of matrix
- Summarize primes
- Sylvester's sequence

### T

### U

### 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 Zkl (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
- Change e letters to i in words
- Changeable words
- Chess player
- Code Golf: Code Golf
- Code segment unload
- Collect and sort square numbers in ascending order from three lists
- Common list elements
- Common sorted list
- Compiler/Simple file inclusion pre processor
- Compiler/Verifying syntax
- Concatenate two primes is also prime
- Conjugate a Latin verb
- Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)
- Coprime triplets
- Coprimes
- Count how many vowels and consonants occur in a string
- Count the coins/0-1
- Cousin primes
- Create your own text control codes
- Cubic special primes
- Cycles of a permutation

### D

- Data Encryption Standard
- Dating agency
- Day of the week of Christmas and New Year
- Decision tables
- Digit fifth powers
- Diophantine linear system solving
- Discrete Fourier transform
- Distinct palindromes within decimal numbers
- Distinct power numbers
- Distribution of 0 digits in factorial series
- Divide a rectangle into a number of unequal triangles
- Dominoes
- Doomsday rule
- Doubly-linked list/Element removal
- Draw pixel 2

### E

### F

- Fibonacci heap
- Fibonacci matrix-exponentiation
- Find URI in text
- Find adjacent primes which differ by a square integer
- Find first missing positive
- Find minimum number of coins that make a given value
- 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 the most consonants
- Find words which contains all the vowels
- Find words which contains more than 3 e vowels
- Find words whose first and last three letters are equal
- Find words with alternating vowels and consonants
- First 9 prime Fibonacci number
- Four sides of square
- Free polyominoes enumeration
- Frobenius numbers

### G

### I

### L

- Largest difference between adjacent primes
- Largest five adjacent number
- Largest palindrome product
- Largest prime factor
- Largest product in a grid
- Last list item
- Logistic curve fitting in epidemiology
- Long stairs
- Longest common suffix
- Longest palindromic substrings
- Longest substrings without repeating characters

### M

- Make a backup file
- Markov chain text generator
- Matrix with two diagonals
- Maximum difference between adjacent elements of list
- Minimum number of cells after, before, above and below NxN squares
- Minimum numbers of three lists
- Minimum primes
- Modulinos
- Morpion solitaire
- Mosaic matrix
- Most frequent k chars distance
- Multiton

### N

- N-body problem
- N-queens minimum and knights and bishops
- Neighbour primes
- Next special primes
- Nice primes
- Nimber arithmetic
- Number triplets game
- Numbers divisible by their individual digits, but not by the product of their digits.
- Numbers in base-16 representation that cannot be written with decimal digits
- Numbers in base 10 that are palindromic in bases 2, 4, and 16
- Numbers which binary and ternary digit sum 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

### O

### P

- Palindromic primes
- Palindromic primes in base 16
- Pandigital prime
- Parse EBNF
- Particle swarm optimization
- Penrose tiling
- Permutations with repetitions
- Permuted multiples
- Piprimes
- Polynomial derivative
- Positive decimal integers with the digit 1 occurring exactly twice
- Practical numbers
- Price list behind API
- 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 itself
- Process SMIL directives in XML data
- Product of divisors
- Proof
- Pseudorandom number generator image

### R

- Ramanujan primes
- 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
- 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
- Round-robin tournament schedule
- Run as a daemon or service

### S

- Safe and Sophie Germain primes
- Sanitize user input
- Segmentation fault protection
- 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
- Singly-linked list/Element removal
- 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
- Solving coin problems
- Sort primes from list to a list
- Sort the letters of string in alphabetical order
- Sorting algorithms/Cycle sort
- Special divisors
- Special factorials
- Special neighbor primes
- Special pythagorean triplet
- Square root by hand
- Starting a web browser
- Steady squares
- Strange numbers
- Strange plus numbers
- Strange unique prime triplets
- Substring primes
- Suffix tree
- 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

### 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
- Three word location
- Topological sort/Extracted top item
- Transportation problem
- Triplet of three numbers
- Tropical algebra overloading
- Two identical strings

### U

### W

## Requiring Attention[edit]

### Examples[edit]

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

### C

### S

## End of List[edit]

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