# Reports:Tasks not implemented in Sidef

**Awareness**

If

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

## Contents

## Not implemented[edit]

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

### A

- ASCII art diagram converter
- Abbreviations, automatic
- Abbreviations, easy
- Abbreviations, simple
- Abelian sandpile model
- Abelian sandpile model/Identity
- Active Directory/Connect
- Active Directory/Search for a user
- Active object
- Aliquot sequence classifications
- Amb
- Angles (geometric), normalization and conversion
- Animation
- Arena storage pool
- Associative array/Merging
- Atomic updates

### B

- Balanced ternary
- Bin given limits
- Binary strings
- Bioinformatics/Sequence mutation
- Bioinformatics/base count
- Biorhythms
- Bitcoin/address validation
- Bitcoin/public point to address
- Bitmap
- 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
- Bitwise IO

### C

- CRC-32
- CUSIP
- Call a foreign-language function
- Call a function in a shared library
- Canny edge detector
- Canonicalize CIDR
- Catmull–Clark subdivision surface
- Chaocipher
- Chat server
- Check input device is a terminal
- Check output device is a terminal
- Checkpoint synchronization
- Chowla numbers
- Church numerals
- Cistercian numerals
- Color of a screen pixel
- Colour pinstripe/Printer
- Commatizing numbers
- Compare length of two strings
- Compare sorting algorithms' performance
- Compiler/AST interpreter
- Compiler/code generator
- Compiler/lexical analyzer
- Compiler/syntax analyzer
- Compiler/virtual machine interpreter
- Conditional structures
- Copy stdin to stdout
- Create a file on magnetic tape
- Create an object at a given address
- Cut a rectangle

### D

- De Bruijn sequences
- Deal cards for FreeCell
- Deconvolution/1D
- Deconvolution/2D+
- Determine if two triangles overlap
- Determine sentence type
- Dining philosophers
- Display an outline as a nested table
- Distributed programming
- Documentation
- Doubly-linked list/Definition
- Doubly-linked list/Element insertion
- Doubly-linked list/Traversal
- Draw a pixel
- Draw a rotating cube
- Dutch national flag problem

### E

### F

- Faces from a mesh
- Factorial base numbers indexing permutations of a collection
- Find Chess960 starting position identifier
- Find if a point is within a triangle
- Fixed length records
- Flipping bits game
- Formal power series
- Four is the number of letters in the ...
- Fraction reduction
- Function prototype
- Functional coverage tree

### G

### H

### I

- ISBN13 check digit
- I before E except after C
- Idiomatically determine all the characters that can be used for symbols
- Idiomatically determine all the lowercase and uppercase letters
- Image convolution
- Image noise
- Increasing gaps between consecutive Niven numbers
- Intersecting number wheels
- Introspection
- Inverted index

### K

### L

- Largest proper divisor of n
- Latin Squares in reduced form
- Latin Squares in reduced form/Randomizing using Jacobson and Matthews’ Technique
- Law of cosines - triples
- Long literals, with continuations
- 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 8-ball
- Magic squares of singly even order
- Main step of GOST 28147-89
- Mastermind
- Matrix chain multiplication
- Matrix digital rain
- Mayan calendar
- Mayan numerals
- Maze solving
- McNuggets problem
- Median filter
- Memory allocation
- Memory layout of a data structure
- Merge and aggregate datasets
- Metered concurrency
- Mind boggling card trick
- Minesweeper game
- Minimal steps down to 1
- Minkowski question-mark function
- Modified random distribution
- Monads/List monad
- Monads/Maybe monad
- Monads/Writer monad
- Morse code
- Mouse position
- Multi-dimensional array
- Multiple regression
- Musical scale
- Mutex

### N

### O

### P

- P-Adic numbers, basic
- P-Adic square roots
- P-value correction
- Padovan sequence
- Pancake numbers
- Paraffins
- Parametric polymorphism
- Parametrized SQL statement
- Parse an IP Address
- Password generator
- Pattern matching
- Peaceful chess queen armies
- Penney's game
- Pentomino tiling
- Percolation/Bond percolation
- Percolation/Mean cluster density
- Peripheral drift illusion
- Permutations/Derangements
- Permutations/Rank of a permutation
- Pig the dice game
- Pinstripe/Display
- Pinstripe/Printer
- Play recorded sounds
- Poker hand analyser
- Polyspiral
- Pragmatic directives
- Pseudo-random numbers/Middle-square method

### R

- RCRPG
- RIPEMD-160
- RPG attributes generator
- Ramanujan primes/twins
- Random Latin squares
- Random sentence from book
- Range consolidation
- Range extraction
- Rare numbers
- Ray-casting algorithm
- Record sound
- Reflection/Get source
- Reflection/List properties
- Rendezvous
- Retrieve and search chat history
- Rosetta Code/Find bare lang tags
- Rosetta Code/Find unimplemented tasks
- Rosetta Code/Rank languages by number of users

### S

- SHA-256 Merkle tree
- SOAP
- Safe addition
- Scope modifiers
- Send email
- Set of real numbers
- Set puzzle
- Set right-adjacent bits
- Show ASCII table
- Simple database
- Simulate input/Keyboard
- Simulate input/Mouse
- Sleeping Beauty problem
- 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
- Sorting algorithms/Cocktail sort with shifting bounds
- Special characters
- Special variables
- Spinning rod animation/Text
- Square form factorization
- Stack traces
- Start from a main routine
- State name puzzle
- Straddling checkerboard
- Strassen's algorithm
- Suffixation of decimal numbers
- Sum of elements below main diagonal of matrix
- Summarize and say sequence
- Synchronous concurrency

### T

- Teacup rim text
- Terminal control/Cursor movement
- Terminal control/Cursor positioning
- Terminal control/Hiding the cursor
- Terminal control/Inverse video
- Terminal control/Positional read
- Ternary logic
- Test a function
- The Name Game
- The sieve of Sundaram
- Tic-tac-toe
- Topswops
- Total circles area
- Tree datastructures
- Tree from nesting levels
- Two bullet roulette

### 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 Sidef (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
- Chemical calculator
- Chess player
- Code Golf: Code Golf
- Code segment unload
- Collect and sort square numbers in ascending order from three lists
- Combinations with repetitions/Square digit chain
- Common list elements
- Common sorted list
- Compiler/Simple file inclusion pre processor
- Compiler/Verifying syntax
- Composite numbers k with no single digit factors whose factors are all substrings of k
- Conjugate a Latin verb
- Continued fraction/Arithmetic/G(matrix ng, continued fraction n)
- Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)
- Count how many vowels and consonants occur in a string
- Count the coins/0-1
- Create an object/Native demonstration
- Create your own text control codes
- Cullen and Woodall numbers
- Curve that touches three points

### D

- Data Encryption Standard
- Dating agency
- Day of the week of Christmas and New Year
- Digit fifth powers
- Diophantine linear system solving
- Discrete Fourier transform
- 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
- 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 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
- Finite state machine
- First 9 Prime Fibonacci Number

### 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
- 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
- Long stairs
- Longest common suffix
- Longest palindromic substrings
- Longest substrings without repeating characters

### M

### O

### P

- Pandigital prime
- Parse EBNF
- Parse command-line arguments
- Particle fountain
- Particle swarm optimization
- Perceptron
- Permuted multiples
- Polynomial derivative
- Price list behind API
- Prime triplets
- Prime words
- Print debugging statement
- Print itself
- Process SMIL directives in XML data
- Product of divisors
- Proof

### R

- Railway circuit
- Ramanujan primes
- Range modifications
- Raster bars
- 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 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

### S

- Safe and Sophie Germain primes
- Safe mode
- Sanitize user input
- Segmentation fault protection
- Selective file copy
- Self-hosting compiler
- Shift list elements to left by 3
- Simple turtle graphics
- Sine wave
- Singly-linked list/Element removal
- Smallest enclosing circle problem
- Smallest multiple
- Smallest number k such that k+2^m is composite for all m less than k
- Smallest power of 6 whose decimal expansion contains n
- Snake and Ladder
- Solve a Rubik's Cube
- Solve equations with substitution method
- Solving coin problems
- Sort the letters of string in alphabetical order
- Sorting algorithms/Tree sort on a linked list
- Special pythagorean triplet
- Spoof game
- Square root by hand
- Starting a web browser
- Steady Squares
- Strange unique prime triplets
- Sum data type
- Sum of primes in odd positions is prime
- Sum of square and cube digits of an integer 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
- Time-based one-time password algorithm
- Topological sort/Extracted top item
- Transportation problem
- Tropical algebra overloading
- Two identical strings
- Type detection

### U

### W

## Requiring Attention[edit]

### Examples[edit]

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

### No pages found.

## End of List[edit]

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