true

Tasks

• 24 game
• 4-rings or 4-squares puzzle
• 9 billion names of God the integer
• A+B
• ABC Problem
• Abstract type
• Abundant, deficient and perfect number classifications
• Accumulator factory
• Ackermann function
• Active object
• Add a variable to a class instance at runtime
• Align columns
• Almost prime
• Anagrams/Deranged anagrams
• Angle difference between two bearings
• Anonymous recursion
• Anti-primes
• Append a record to the end of a text file
• Apply a callback to an array
• Arbitrary-precision integers (included)
• Arithmetic evaluation
• Arithmetic-geometric mean
• Arithmetic/Complex
• Arithmetic/Integer
• Arithmetic/Rational
• Array concatenation
• Array length
• Arrays
• Assertions
• Associative array/Creation
• Associative array/Iteration
• Atomic updates
• Attractive numbers
• 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
• Babbage problem
• Balanced brackets
• Balanced ternary
• Benford's law
• Best shuffle
• Binary digits
• Binary search
• Bitwise operations
• Boolean values
• Box the compass
• CRC-32
• CSV data manipulation
• CSV to HTML translation
• Caesar cipher
• Calculating the value of e
• Call a function
• Cartesian product of two or more lists
• Case-sensitivity of identifiers
• Catalan numbers
• Catalan numbers/Pascal's triangle
• Catamorphism
• Character codes
• Chat server
• Check that file exists
• Chowla numbers
• Classes
• Closest-pair problem
• Closures/Value capture
• Collections
• Combinations
• Comma quibbling
• Command-line arguments
• Comments
• Compound data type
• Concurrent computing
• Convert decimal number to rational
• Copy a string
• Count in factors
• Count in octal
• Count occurrences of a substring
• Count the coins
• Create a file
• Create a two-dimensional array at runtime
• Create an HTML table
• Cumulative standard deviation
• Currying
• DNS query
• Date format
• Date manipulation
• Day of the week
• Delete a file
• Detect division by zero
• Determine if a string is numeric
• Dining philosophers
• Dot product
• Dynamic variable names
• Element-wise operations
• Empty directory
• Empty program
• Empty string
• Entropy
• Enumerations
• Environment variables
• Euler method
• Euler's identity
• Evaluate binomial coefficients
• Even or odd
• Execute Brainfuck
• Execute a Markov algorithm
• Execute a system command
• Exponentiation order
• Extreme floating point values
• FTP
• Factorial
• Fibonacci n-step number sequences
• Fibonacci sequence
• Filter
• Find common directory path
• Find limit of recursion
• Find the last Sunday of each month
• Find the missing permutation
• First-class functions
• First-class functions/Use numbers analogously
• Five weekends
• FizzBuzz
• Flatten a list
• Fork
• Formatted numeric output
• Function composition
• Function definition
• GUI/Maximum window dimensions
• Gamma function
• General FizzBuzz
• Generate lower case ASCII alphabet
• Generic swap
• Gray code
• Greatest common divisor
• Greatest element of a list
• Guess the number
• Guess the number/With feedback
• HTTP
• HTTPS
• Hailstone sequence
• Happy numbers
• Harshad or Niven series
• Hash from two arrays
• Hash join
• Haversine formula
• Hello world!
• Hello world/Graphical
• Hello world/Line printer
• Hello world/Newbie
• Hello world/Newline omission
• Hello world/Standard error
• Hello world/Text
• Here document
• Higher-order functions
• Horner's rule for polynomial evaluation
• Host introspection
• Hostname
• Huffman coding
• IBAN
• Identity matrix
• Increment a numerical string
• Infinity
• Inheritance/Multiple
• Inheritance/Single
• Input loop
• Integer comparison
• Integer overflow
• Integer sequence
• Interactive programming
• JSON
• Jensen's Device
• Josephus problem
• Kernighans large earthquake problem
• Knapsack problem/0-1
• Knapsack problem/Continuous
• Knapsack problem/Unbounded
• Knuth shuffle
• LZW compression
• Largest int from concatenated ints
• Last Friday of each month
• Leap year
• Least common multiple
• Letter frequency
• Levenshtein distance
• Literals/Floating point
• Literals/Integer
• Literals/String
• Logical operations
• Longest common subsequence
• Longest string challenge
• 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/N plus one half
• Loops/Nested
• Loops/While
• Loops/with multiple ranges
• Luhn test of credit card numbers
• MD5
• MD5/Implementation
• Man or boy test
• Map range
• Matrix multiplication
• Matrix transposition
• Metered concurrency
• Middle three digits
• Modular exponentiation
• Modulinos
• Multiline shebang
• Multiple distinct objects
• Multiplication tables
• Mutual recursion
• N-queens problem
• Non-decimal radices/Convert
• Nth root
• Number names
• Number reversal game
• Numerical integration
• Object serialization
• One-dimensional cellular automata
• Optional parameters
• Order two numerical lists
• Ordered Partitions
• Ordered words
• Palindrome detection
• Parametric polymorphism
• Parsing/RPN calculator algorithm
• Parsing/RPN to infix conversion
• Partial function application
• Pascal's triangle
• Perfect numbers
• Permutations
• Permutations/Derangements
• Pernicious numbers
• Phrase reversals
• Pi
• Pick random element
• Pig the dice game
• Playing cards
• Plot coordinate pairs
• Polymorphic copy
• Polymorphism
• Power set
• Price fraction
• Primality by trial division
• Prime decomposition
• Priority queue
• Program name
• Program termination
• Pythagorean triples
• Queue/Definition
• Queue/Usage
• Quine
• Random number generator (device)
• Random number generator (included)
• Random numbers
• Range expansion
• Range extraction
• Read a configuration file
• Read a file line by line
• Read a specific line from a file
• Read entire file
• Real constants and functions
• Reduced row echelon form
• Reflection/List properties
• Regular expressions
• Remove duplicate elements
• Rename a file
• Repeat a string
• Respond to an unknown method call
• Return multiple values
• Reverse a string
• Reverse words in a string
• Roman numerals/Decode
• Roman numerals/Encode
• Roots of unity
• Rot-13
• Run-length encoding
• Runge-Kutta method
• Runtime evaluation
• Runtime evaluation/In an environment
• SEDOLs
• SHA-256
• Search a list
• Secure temporary file
• Self-referential sequence
• Semordnilap
• Send an unknown method call
• Send email
• Sequence of non-squares
• Set
• Seven-sided dice from five-sided dice
• 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
• Sleep
• Sockets
• Sort an array of composite structures
• Sort an integer array
• Sort disjoint sublist
• Sort stability
• Sort using a custom comparator
• Sorting algorithms/Bead sort
• Sorting algorithms/Bogosort
• Sorting algorithms/Bubble sort
• Sorting algorithms/Cocktail sort
• Sorting algorithms/Comb sort
• Sorting algorithms/Counting sort
• Sorting algorithms/Gnome sort
• Sorting algorithms/Heapsort
• Sorting algorithms/Insertion sort
• Sorting algorithms/Merge sort
• Sorting algorithms/Pancake sort
• Sorting algorithms/Permutation sort
• Sorting algorithms/Radix sort
• Sorting algorithms/Sleep sort
• Soundex
• Sparkline in unicode
• Speech synthesis
• Spiral matrix
• Stable marriage problem
• Stack
• Stack traces
• Stair-climbing puzzle
• String append
• String case
• String concatenation
• String interpolation (included)
• String length
• String matching
• Strip a set of characters from a string
• Strip block comments
• 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
• System time
• Take notes on the command line
• Temperature conversion
• Terminal control/Ringing the terminal bell
• Ternary logic
• Text processing/Max licenses in use
• The Twelve Days of Christmas
• Tic-tac-toe
• Time a function
• Tokenize a string
• Top rank per group
• Tree traversal
• Trigonometric functions
• Twelve statements
• URL decoding
• URL encoding
• URL parser
• UTF-8 encode and decode
• Unicode variable names
• Validate International Securities Identification Number
• Variable-length quantity
• Variadic function
• Vector
• Vector products
• Video display modes
• Walk a directory/Non-recursively
• Walk a directory/Recursively
• Water collected between towers
• Web scraping
• Window creation
• Window creation/X11
• Word frequency
• Word wrap
• Write entire file
• XML Validation
• XML/DOM serialization
• XML/Input
• XML/Output
• XML/XPath
• Y combinator
• Zero to the zero power
• Zhang-Suen thinning algorithm
• Zig-zag matrix