# Reports:Tasks not implemented in Scala

**Awareness**

If

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

## Contents

## Not implemented[edit]

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

### A

### B

### C

- Calendar - for "REAL" programmers
- Canny edge detector
- Carmichael 3 strong pseudoprimes
- Catmull–Clark subdivision surface
- Chat server
- Check Machin-like formulas
- Chowla numbers
- Church Numerals
- Color quantization
- Colour pinstripe/Printer
- Combinations and permutations
- Compare sorting algorithms' performance
- Compiler/AST interpreter
- Compiler/code generator
- Compiler/lexical analyzer
- Compiler/syntax analyzer
- Compiler/virtual machine interpreter
- Continued fraction/Arithmetic/Construct from rational number
- Cramer's rule
- Cuban primes
- Cut a rectangle

### D

### E

### F

### K

### L

### M

### N

### P

- Parallel calculations
- Parsing/RPN to infix conversion
- Parsing/Shunting-yard algorithm
- Partition an integer X into N primes
- Pathological floating point problems
- Peaceful chess queen armies
- Peano curve
- Pell's equation
- Penney's game
- Percentage difference between images
- Percolation/Bond percolation
- Percolation/Mean cluster density
- Percolation/Mean run density
- Percolation/Site percolation
- Pig the dice game
- Pig the dice game/Player
- Pinstripe/Printer
- Play recorded sounds
- Polynomial long division
- Polynomial regression
- Population count
- Primes - allocate descendants to their ancestors

### R

### S

- S-Expressions
- SOAP
- SQL-based authentication
- Safe primes and unsafe primes
- Same Fringe
- Scope modifiers
- Sequence of primorial primes
- Set of real numbers
- Set puzzle
- Shortest common supersequence
- Show Ascii table
- Sierpinski triangle/Graphical
- 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 three variables
- Sorting algorithms/Bead sort
- Sorting algorithms/Pancake sort
- Sorting algorithms/Permutation sort
- Sorting algorithms/Strand sort
- Spelling of ordinal numbers
- Square-free integers
- Square but not cube
- Statistics/Normal distribution
- Straddling checkerboard
- Strong and weak primes
- Subtractive generator
- Successive prime differences
- Suffixation of decimal numbers
- Sum data type

### T

### V

### Draft tasks without implementation[edit]

These tasks as drafts, meaning they largely need more work to turn them into full tasks. Perhaps you can help by trying to implement them in Scala (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.

### 2

### A

### B

### C

- Card shuffles
- Chaocipher
- Checksumcolor
- Chemical Calculator
- Chernick's Carmichael numbers
- Cheryl's Birthday
- Chess player
- Chess player/Move generation
- Chess player/Program options and user interface
- Chess player/Search and evaluation
- Color wheel
- Combinations with repetitions/Square Digit Chain
- Continued fraction/Arithmetic/G(matrix NG, Contined Fraction N)
- Continued fraction/Arithmetic/G(matrix NG, Contined Fraction N1, Contined Fraction N2)
- Copy stdin to stdout
- Curve that touches three points
- Cycle detection

### D

### E

### F

- Faulhaber's formula
- Faulhaber's triangle
- Feigenbaum constant calculation
- Fibonacci heap
- File size distribution
- Find URI in text
- Find duplicate files
- Find first and last set bit of a long integer
- Finite state machine
- First perfect square in base N with N unique digits
- French Republican calendar
- Functional coverage tree

### G

### H

### I

### M

### N

### P

### R

- Railway circuit
- Ramanujan's constant
- Ramsey's theorem
- Random Latin Squares
- Raster bars
- Read a file character by character/UTF8
- Readline interface
- Recursive descent parser generator
- Remote agent/Agent interface
- Remote agent/Agent logic
- Remote agent/Simulation
- Resistance Calculator
- Resistance Network Calculator
- Robots
- Rosetta Code/List authors of task descriptions
- Rosetta Code/Rank languages by number of users
- Rosetta Code/Run examples
- Rosetta Code/Tasks sorted by average lines of code
- Rosetta Code/Tasks without examples
- Run as a daemon or service

### S

- Safe mode
- Selective File Copy
- 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
- Sexy primes
- Simulated annealing
- Sine wave
- Singly-linked list/Element removal
- Smarandache prime-digital sequence
- Snake
- Snake And Ladder
- Solve a Rubik's Cube
- Solving coin problems
- Sort numbers lexicographically
- Sorting algorithms/Patience sort
- Sorting algorithms/Tree sort on a linked list
- Spoof game
- Suffix tree
- Sunflower fractal

### T

- Tamagotchi emulator
- Tarjan
- Terminal control/Restricted width positional input/No wrapping
- Terminal control/Restricted width positional input/With wrapping
- Tetris
- Text between
- Text to HTML
- Time-based One-time Password Algorithm
- Tonelli-Shanks algorithm
- Topological sort/Extracted top item
- Transportation problem

### U

## Requiring Attention[edit]

### Examples[edit]

These tasks have implementations in Scala, 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.

### C

### E

### F

### P

### S

### Other pages[edit]

These are other pages related to Scala 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 Scala was inappropriate for these tasks, or implementations of them would be unenlightening. Feel free to try your hand at them anyway.

## End of List[edit]

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