Category:Crystal
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This programming language may be used to instruct a computer to perform a task.
| Official website |
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| Execution method: | Compiled (machine code) |
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| Garbage collected: | Yes |
| Parameter passing methods: | By reference, By value |
| Type strength: | Strong |
| Type compatibility: | Duck |
| Type expression: | Implicit, Explicit |
| Type checking: | Static |
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Crystal is a programming language with the following goals:
- Have the same syntax as Ruby, or at least as similar as possible.
- Never have to specify the type of a variable or method argument.
- Be able to call C code by writing bindings to it in Crystal.
- Have compile-time evaluation and generation of code, to avoid boilerplate code.
- Compile to efficient native code.
You can ask for help on LiberaChat in the #crystal-lang channel (web).
Tasks not implemented in Crystal
Pages in category "Crystal"
The following 200 pages are in this category, out of 579 total.
(previous page) (next page)A
- A+B
- Abbreviations, automatic
- Abbreviations, easy
- Abbreviations, simple
- ABC correlation
- ABC incremental counts
- ABC problem
- ABC words
- Abelian sandpile model
- Abelian sandpile model/Identity
- Abstract type
- Abundant odd numbers
- Abundant, deficient and perfect number classifications
- Accumulator factory
- Achilles numbers
- Ackermann function
- Active object
- Add a variable to a class instance at runtime
- Additive primes
- Address of a variable
- ADFGVX cipher
- AKS test for primes
- Align columns
- Aliquot sequence classifications
- Almost prime
- Alternade words
- Amb
- Amicable pairs
- Anadromes
- Anagram generator
- Anagrams
- Anagrams/Deranged anagrams
- Anaprimes
- Angle difference between two bearings
- Angles (geometric), normalization and conversion
- Anonymous recursion
- Anti-primes
- Append a record to the end of a text file
- Append numbers at same position in strings
- Apply a callback to an array
- Apply a digital filter (direct form II transposed)
- Approximate equality
- Apéry's constant
- Arbitrary-precision integers (included)
- Archimedean spiral
- Arithmetic derivative
- Arithmetic evaluation
- Arithmetic numbers
- Arithmetic-geometric mean
- Arithmetic-geometric mean/Calculate Pi
- Arithmetic/Complex
- Arithmetic/Integer
- Arithmetic/Rational
- Array concatenation
- Array length
- Arrays
- Ascending primes
- ASCII art diagram converter
- ASCII control characters
- Assertions
- Associative array/Creation
- Associative array/Iteration
- Associative array/Merging
- Atomic updates
- Attractive numbers
- Autogram checker
- Average loop length
- Averages/Arithmetic mean
- Averages/Mean angle
- Averages/Mean time of day
- Averages/Median
- Averages/Mode
- Averages/Pythagorean means
- Averages/Root mean square
- Averages/Simple moving average
- AVL tree
B
- Babbage problem
- Babylonian spiral
- Balanced brackets
- Base 16 numbers needing a to f
- Base64 decode data
- Base64 encode data
- Bell numbers
- Benford's law
- Bernoulli numbers
- Bernoulli's triangle
- Bernstein basis polynomials
- Best shuffle
- Bifid cipher
- Bin given limits
- Binary digits
- Binary search
- Bioinformatics/Base count
- Bioinformatics/Global alignment
- Bioinformatics/Subsequence
- Biorhythms
- Birthday problem
- Bitmap
- Bitmap/Bresenham's line algorithm
- Bitmap/Flood fill
- Bitmap/Midpoint circle algorithm
- Bitmap/Read a PPM file
- Bitmap/Write a PPM file
- Bitwise operations
- Boolean values
- Bulls and cows
- Bulls and cows/Player
C
- Caesar cipher
- Call a foreign-language function
- Call a function in a shared library
- Camel case and snake case
- Cartesian product of two or more lists
- Case-sensitivity of identifiers
- Catalan numbers
- Catamorphism
- Change e letters to i in words
- Changeable words
- Chaocipher
- Character codes
- Check input device is a terminal
- Check output device is a terminal
- Check that file exists
- Chinese remainder theorem
- Chronological order
- Church numerals
- Cistercian numerals
- Classes
- Closest-pair problem
- Closures/Value capture
- Collect and sort square numbers in ascending order from three lists
- Color wheel
- Colour bars/Display
- Combinations
- Combinations and permutations
- Combinations with repetitions
- Comma quibbling
- Comments
- Common list elements
- Common sorted list
- Compare a list of strings
- Compile-time calculation
- Compound data type
- Concurrent computing
- Consecutive primes with ascending or descending differences
- Constrained genericity
- Convert seconds to compound duration
- Copy a string
- Copy stdin to stdout
- Count how many vowels and consonants occur in a string
- Count in octal
- Count occurrences of a substring
- CRC-32
- Create a file
- Create a file on magnetic tape
- Create a two-dimensional array at runtime
- Cullen and Woodall numbers
- Cumulative standard deviation
- Currency
- Currying
- CUSIP
D
- Date format
- Date manipulation
- Dating agency
- Day of the week
- Day of the week of Christmas and New Year
- Days between dates
- Decorate-sort-undecorate idiom
- Department numbers
- Detect division by zero
- Determine if a string has all the same characters
- Determine if a string is collapsible
- Determine if a string is numeric
- Determine sentence type
- Digital root
- Digital root/Multiplicative digital root
- Dijkstra's algorithm
- Dinesman's multiple-dwelling problem
- Diversity prediction theorem
- Dividuus numbers
- DNS query
- Documentation
- Dot product
- Dutch national flag problem