# Reports:Tasks not implemented in 11l

**Awareness**

If

**11l**is a language you like, or are interested in, please inform your fellow members of the 11l community; this page can't be emptied without your and their participation.

## Contents

## Not implemented[edit]

These are currently not implemented in 11l. Please implement some if you can. If any tasks are not possible or too complex in 11l, they should not be on this list. To mark a task as such, add **{{omit from|11l}}**, 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
- Active Directory/Connect
- Active Directory/Search for a user
- Active object
- Add a variable to a class instance at runtime
- Additive primes
- Address of a variable
- Animate a pendulum
- Animation
- Append a record to the end of a text file
- Approximate equality
- Archimedean spiral
- Arena storage pool
- Arithmetic-geometric mean/Calculate Pi
- Arithmetic/Rational
- Atomic updates

### B

- Barnsley fern
- Base64 decode data
- Bernoulli numbers
- Bitcoin/address validation
- Bitcoin/public point to address
- Bitmap/Bézier curves/Quadratic
- Bitmap/Flood fill
- Bitmap/Histogram
- Bitmap/PPM conversion through a pipe
- Bitmap/Read an image through a pipe
- Break OO privacy
- Brownian tree
- Bulls and cows
- Bulls and cows/Player

### C

- Calendar
- Calendar - for "REAL" programmers
- Call a foreign-language function
- Call a function in a shared library
- Call an object method
- Canny edge detector
- Catmull–Clark subdivision surface
- Chaos game
- Chat server
- Check Machin-like formulas
- Check input device is a terminal
- Check output device is a terminal
- Checkpoint synchronization
- Chernick's Carmichael numbers
- Church numerals
- Circular primes
- Cistercian numerals
- Closest-pair problem
- Color of a screen pixel
- Color quantization
- Color wheel
- Colour bars/Display
- Colour pinstripe/Display
- Colour pinstripe/Printer
- 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
- Concurrent computing
- Consecutive primes with ascending or descending differences
- Constrained genericity
- Copy stdin to stdout
- Count in octal
- Create a file on magnetic tape
- Create an object at a given address
- Cuban primes
- Cyclotomic polynomial

### D

- DNS query
- Deconvolution/2D+
- Deepcopy
- Define a primitive data type
- Delegates
- Detect division by zero
- Determine if a string is numeric
- Determine if only one instance is running
- Determine sentence type
- Dining philosophers
- Discordian date
- Display an outline as a nested table
- Distributed programming
- Documentation
- 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 pixel
- Draw a rotating cube
- Dynamic variable names

### E

- Echo server
- Egyptian fractions
- Element-wise operations
- Elliptic Curve Digital Signature Algorithm
- Entropy/Narcissist
- Esthetic numbers
- Euler's constant 0.5772...
- Events
- Executable library
- Exponentiation with infix operators in (or operating on) the base
- Extend your language
- Extensible prime generator
- Extreme floating point values

### F

- FTP
- Factorial base numbers indexing permutations of a collection
- Faulhaber's formula
- Faulhaber's triangle
- Fermat numbers
- Fibonacci word/fractal
- File modification time
- File size distribution
- Find Chess960 starting position identifier
- Find duplicate files
- Find largest left truncatable prime in a given base
- Find limit of recursion
- First-class functions
- First class environments
- Five weekends
- Fixed length records
- Flatten a list
- Forest fire
- Fork
- Formal power series
- Fortunate numbers
- Four is the number of letters in the ...
- French Republican calendar
- Function frequency
- Function prototype
- Functional coverage tree

### G

### H

### I

### K

### L

### M

- MAC Vendor Lookup
- MD4
- MD5
- Machine code
- Magnanimous numbers
- Main step of GOST 28147-89
- Man or boy test
- Matrix digital rain
- Mayan calendar
- Median filter
- Memory allocation
- Memory layout of a data structure
- Metallic ratios
- Metaprogramming
- Metered concurrency
- Minesweeper game
- Minimum positive multiple in base 10 using only 0 and 1
- Modular arithmetic
- Monads/List monad
- Monads/Maybe monad
- Monads/Writer monad
- Morse code
- Motzkin numbers
- Mouse position
- Multiple regression
- Munching squares
- Musical scale
- Mutex
- Mutual recursion
- Möbius function

### N

### O

### P

- P-Adic numbers, basic
- P-Adic square roots
- P-value correction
- Padovan n-step number sequences
- Padovan sequence
- Palindromic gapful numbers
- Pancake numbers
- Paraffins
- Parallel brute force
- Parallel calculations
- Parametric polymorphism
- Parametrized SQL statement
- Parse an IP Address
- Partial function application
- Password generator
- Pathological floating point problems
- Pattern matching
- Peano curve
- Penney's game
- Pentagram
- Percentage difference between images
- Percolation/Bond percolation
- Percolation/Mean cluster density
- Percolation/Mean run density
- Percolation/Site percolation
- Peripheral drift illusion
- Permutations/Rank of a permutation
- Pierpont primes
- Pig the dice game
- Pig the dice game/Player
- Pinstripe/Display
- Pinstripe/Printer
- Pisano period
- Plasma effect
- Play recorded sounds
- Playing cards
- Plot coordinate pairs
- Pointers and references
- Polymorphic copy
- Polymorphism
- Polyspiral
- Pragmatic directives
- Probabilistic choice
- Pythagoras tree

### R

- RCRPG
- RIPEMD-160
- RPG attributes generator
- Ramanujan's constant
- Ramanujan primes/twins
- Random number generator (device)
- Random number generator (included)
- Random numbers
- Random sentence from book
- Rare numbers
- Rate counter
- Read a file character by character/UTF8
- Read a file line by line
- Record sound
- Reflection/Get source
- Reflection/List methods
- Reflection/List properties
- Rendezvous
- Respond to an unknown method call
- Retrieve and search chat history
- Rock-paper-scissors
- Rosetta Code/Count examples
- Rosetta Code/Find bare lang tags
- Rosetta Code/Find unimplemented tasks
- Rosetta Code/Rank languages by number of users
- Rosetta Code/Rank languages by popularity
- Runtime evaluation
- Runtime evaluation/In an environment

### S

- S-expressions
- SHA-1
- SHA-256
- SHA-256 Merkle tree
- SOAP
- SQL-based authentication
- Safe addition
- Safe primes and unsafe primes
- Same fringe
- Scope/Function names and labels
- Secure temporary file
- Self numbers
- Send an unknown method call
- Send email
- Sequence: nth number with exactly n divisors
- Sequence of primorial primes
- Set consolidation
- Set of real numbers
- Set puzzle
- Shell one-liner
- Show the epoch
- Sierpinski arrowhead curve
- Sierpinski pentagon
- Sierpinski square curve
- Sierpinski triangle/Graphical
- Simple database
- 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
- Sort an outline at every level
- Sorting algorithms/Sleep sort
- Sparkline in unicode
- Special variables
- Speech synthesis
- Spelling of ordinal numbers
- Square form factorization
- Stack traces
- Start from a main routine
- Statistics/Normal distribution
- Strassen's algorithm
- Stream merge
- String length
- Sum and product puzzle
- Sum of elements below main diagonal of matrix
- Summarize primes
- Superellipse
- Sylvester's sequence
- Synchronous concurrency

### T

- Table creation/Postal addresses
- 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
- Terminal control/Unicode output
- Ternary logic
- Test a function
- The ISAAC Cipher
- The sieve of Sundaram
- Topic variable
- Tree datastructures
- Tree from nesting levels
- Twelve statements
- Twin primes

### 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 11l (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

### C

- CLI-based maze-game
- Camel case and snake case
- Card shuffles
- Checksumcolor
- Chemical calculator
- Chess player
- Code segment unload
- Combinations with repetitions/Square digit chain
- 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
- 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
- Cubic Special Primes
- Curve that touches three points
- Cyclops numbers

### D

### E

### F

- Fibonacci heap
- Fibonacci matrix-exponentiation
- Find URI in text
- Find adjacents primes which difference is 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 words which contain the most consonants
- Find words which contains all the vowels
- Find words whose first and last three letters are equal
- Free polyominoes enumeration

### G

### I

### L

### M

### N

- Native shebang
- Neighbour primes
- Next special primes
- Nice primes
- 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 are not the sum of distinct squares
- 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
- Numerical integration/Adaptive Simpson's method

### O

### P

- Palindromic primes
- Palindromic primes in base 16
- Pandigital prime
- Parse EBNF
- Parse command-line arguments
- Particle fountain
- Particle swarm optimization
- Penrose tiling
- Pentomino tiling
- Perceptron
- Permutations with some identical elements
- Permuted multiples
- Piprimes
- Polynomial derivative
- Positive decimal integers with the digit 1 occurring exactly twice
- Powerful numbers
- Practical numbers
- Price list behind API
- Prime numbers p which sum of prime numbers less 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 debugging statement
- Process SMIL directives in XML data
- Proof
- Pseudorandom number generator image

### R

- Railway circuit
- Ramanujan primes
- Raster bars
- Recursive descent parser generator
- Remote agent/Agent interface
- Remote agent/Agent logic
- Remote agent/Simulation
- 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 mode
- Segmentation fault protection
- 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 curve
- Simple turtle graphics
- Simulated annealing
- Sine wave
- 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 the letters of string in alphabetical order
- Sorting algorithms/Tree sort on a linked list
- Special Divisors
- Special factorials
- Special neighbor primes
- Special pythagorean triplet
- Spoof game
- Square root by hand
- Starting a web browser
- Substring primes
- Sum data type
- Sum of first n cubes
- Sum of primes in odd positions is prime
- Sum of the digits of n is substring of n
- 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
- Transportation problem
- Triplet of three numbers
- Tropical algebra overloading
- Type detection

### U

### W

## Requiring Attention[edit]

### Examples[edit]

These tasks have implementations in 11l, 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 11l 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 11l 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.