Category:Scala

1

• 100 doors

2

• 24 game
• 24 game/Solve

9

• 99 Bottles of Beer

A

• A+B
• Abstract type
• Accumulator factory
• Ackermann function
• Active object
• Add a variable to a class instance at runtime
• Align columns
• Amb
• Anagrams
• Anagrams/Deranged anagrams
• Animate a pendulum
• Animation
• Anonymous recursion
• Apply a callback to an array
• Arbitrary-precision integers (included)
• Arithmetic evaluation
• Arithmetic-geometric mean
• Arithmetic/Complex
• Arithmetic/Integer
• Arithmetic/Rational
• Array concatenation
• Arrays
• Assertions
• Associative array/Creation
• Associative array/Iteration
• Atomic updates
• Averages/Arithmetic mean
• Averages/Median
• Averages/Mode
• Averages/Pythagorean means
• Averages/Root mean square
• Averages/Simple moving average

B

• Balanced brackets
• Benford's law
• Binary digits
• Binary search
• Bitmap
• Bitmap/Bresenham's line algorithm
• Bitmap/Histogram
• Bitmap/Midpoint circle algorithm
• Bitmap/Read a PPM file
• Bitmap/Write a PPM file
• Bitwise operations
• Boolean values
• Box the compass
• Bulls and cows

C

• Caesar cipher
• Calendar
• Case-sensitivity of identifiers
• Catalan numbers
• Character codes
• Character matching
• Cholesky decomposition
• Classes
• Closest-pair problem
• Closures/Value capture
• Collections
• Colour bars/Display
• Combinations
• Combinations with repetitions
• Command-line arguments
• Comments
• Compound data type
• Concurrent computing
• Constrained genericity
• Continued fraction
• Conway's Game of Life
• Copy a string
• Count in octal
• Count occurrences of a substring
• Count the coins
• Create a two-dimensional array at runtime
• CSV to HTML translation

D

• Date format
• Date manipulation
• Day of the week
• Detect division by zero
• Determine if a string is numeric
• Digital root
• Dinesman's multiple-dwelling problem
• Discordian date
• Dot product

E

• Empty directory
• Empty program
• Empty string
• Enforced immutability
• Entropy
• Enumerations
• Ethiopian multiplication
• Euler method
• Evaluate binomial coefficients
• Even or odd
• Evolutionary algorithm
• Execute a Markov algorithm
• Execute a system command
• Execute HQ9+
• Exponentiation operator
• Extend your language

F

• Factorial
• Factors of a Mersenne number
• Factors of an integer
• Fast Fourier transform
• Fibonacci sequence
• File IO
• Filter
• Find limit of recursion
• Find the missing permutation
• First-class functions
• First-class functions/Use numbers analogously
• FizzBuzz
• Flatten a list
• Floyd's triangle
• Forest fire

F cont.

• Formatted numeric output
• Forward difference
• Four bit adder
• Fractal tree
• Function composition
• Function definition

G

• Gamma function
• Generator/Exponential
• Generic swap
• Gray code
• Grayscale image
• Greatest common divisor
• Greatest element of a list
• Greatest subsequential sum
• Greyscale bars/Display
• Guess the number
• GUI component interaction
• GUI enabling/disabling of controls

H

• Hailstone sequence
• Hamming numbers
• Happy numbers
• Harshad or Niven series
• Hash from two arrays
• Haversine formula
• Hello world/Graphical
• Hello world/Standard error
• Hello world/Text
• Higher-order functions
• History variables
• Hofstadter Figure-Figure sequences
• Hofstadter Q sequence
• Hofstadter-Conway $10,000 sequence
• Holidays related to Easter
• Horner's rule for polynomial evaluation
• Hostname
• HTTP
• Huffman coding

I

• Identity matrix
• Image noise
• Increment a numerical string
• Infinity
• Inheritance/Single
• Input loop
• Integer comparison
• Integer sequence
• Interactive programming

J

• Jensen's Device
• Josephus problem
• JSON

K

• Kaprekar numbers
• Knapsack problem/0-1
• Knuth shuffle

L

• Langton's ant
• Largest int from concatenated ints
• Last Friday of each month
• Leap year
• Least common multiple
• Letter frequency
• Levenshtein distance
• Linear congruential generator
• List comprehensions
• Literals/Integer
• Literals/String
• Logical operations
• Long multiplication
• Longest common subsequence
• Look-and-say sequence
• Loop over multiple arrays simultaneously
• Loops/Break
• Loops/Continue
• Loops/Do-while
• Loops/Downward for
• Loops/For
• Loops/For with a specified step
• Loops/Foreach
• Loops/Infinite
• Loops/Nested
• Loops/While
• Lucas-Lehmer test
• Luhn test of credit card numbers

M

• Man or boy test
• Mandelbrot set
• Map range
• Matrix multiplication
• Matrix transposition
• Matrix-exponentiation operator
• MD5
• Middle three digits
• Modular exponentiation
• Monte Carlo methods
• Monty Hall problem
• Multiline shebang
• Multiple distinct objects
• Multisplit
• Mutual recursion

N

• N-queens problem
• Named parameters
• Nth root
• Null object
• Number names
• Numerical integration

O

• One-dimensional cellular automata
• Optional parameters
• Ordered words

P

• Palindrome detection
• Pangram checker
• Parametric polymorphism
• Partial function application
• Pascal's triangle
• Pattern matching
• Perfect numbers
• Permutations
• Permutations with repetitions
• Pi
• Plot coordinate pairs
• Power set
• Price fraction

P cont.

• Primality by trial division
• Prime decomposition
• Priority queue
• Problem of Apollonius
• Program name

Q

• Quaternion type
• Queue/Definition
• Queue/Usage
• Quine

R

• Random numbers
• Range expansion
• Range extraction
• Rate counter
• Read a file line by line
• Read a specific line from a file
• Regular expressions
• Remove duplicate elements
• Rename a file
• Repeat a string
• Respond to an unknown method call
• Return multiple values
• Reverse a string
• Roman numerals/Decode
• Roman numerals/Encode
• Roots of a quadratic function
• Roots of unity
• Rosetta Code/Count examples
• Rosetta Code/Rank languages by popularity
• Rot-13
• Run-length encoding

S

• Scripted main
• Search a list
• Secure temporary file
• SEDOLs
• Semordnilap
• Sequence of non-squares
• Set
• Shell one-liner
• Short-circuit evaluation
• Show the epoch
• Sierpinski carpet
• Sierpinski triangle
• Sieve of Eratosthenes
• Simple windowed application
• Singleton
• Singly-linked list/Element definition
• Singly-linked list/Element insertion
• Singly-linked list/Traversal
• Sleep
• Sort an integer array
• Sort stability
• Sort using a custom comparator
• Sorting algorithms/Bogosort
• Sorting algorithms/Bubble sort
• Sorting algorithms/Counting sort
• Sorting algorithms/Heapsort
• Sorting algorithms/Insertion sort
• Sorting algorithms/Merge sort
• Sorting algorithms/Quicksort
• Sorting algorithms/Selection sort
• Sorting algorithms/Shell sort
• Sorting algorithms/Sleep sort
• Soundex
• Spiral matrix
• Stack
• Stack traces
• Stair-climbing puzzle
• Stem-and-leaf plot
• String case
• String concatenation
• String interpolation (included)
• Strip a set of characters from a string
• Strip comments from a string
• Strip control codes and extended characters from a string
• Strip whitespace from a string/Top and tail
• Substring
• Substring/Top and tail
• Sudoku
• Sum and product of an array
• Sum digits of an integer
• Sum multiples of 3 and 5
• Sum of a series
• Sum of squares
• Symmetric difference
• Synchronous concurrency
• System time

T

• Ternary logic
• Test a function
• Text processing/1
• Text processing/2
• Tic-tac-toe
• Time a function
• Tokenize a string
• Top rank per group
• Towers of Hanoi
• Tree traversal

U

• Unicode variable names
• URL decoding
• User input/Text

V

• Vampire number
• Variable-length quantity
• Variadic function
• Vector products
• Vigenère cipher

W

• Walk a directory/Non-recursively
• Walk a directory/Recursively
• Web scraping
• Window creation
• Write language name in 3D ASCII

X

• XML/DOM serialization
• XML/Input
• XML/Output
• XML/XPath

Y

• Y combinator

Z

• Zeckendorf arithmetic
• Zeckendorf number representation
• Zig-zag matrix