Jq

jq is a functional programming language that is oriented towards processing text files or JSON. jq is also the name of a portable executable that compiles and runs jq programs.

jq was originally designed and developed by Stephen Dolan.

Tasks

• 100 doors
• 24 game/Solve
• A+B
• ABC Problem
• AKS test for primes
• Abundant, deficient and perfect number classifications
• Ackermann function
• Add a variable to a class instance at runtime
• Align columns
• Aliquot sequence classifications
• Almost prime
• Amb
• Amicable pairs
• Anagrams
• Anagrams/Deranged anagrams
• Anonymous recursion
• Apply a callback to an array
• Arithmetic evaluation
• Arithmetic-geometric mean
• Arithmetic/Complex
• Arithmetic/Integer
• Array concatenation
• Array length
• Arrays
• Associative array/Creation
• Associative array/Iteration
• Averages/Arithmetic mean
• Averages/Mean angle
• Averages/Mean time of day
• Averages/Median
• Averages/Mode
• Averages/Pythagorean means
• Averages/Root mean square
• Babbage problem
• Benford's law
• Bernoulli numbers
• Best shuffle
• Binary digits
• Binary search
• Binary strings
• Boolean values
• CSV data manipulation
• CSV to HTML translation
• Call a function
• Cartesian product of two or more lists
• Case-sensitivity of identifiers
• Casting out nines
• Catalan numbers
• Catalan numbers/Pascal's triangle
• Catamorphism
• Character codes
• Chinese remainder theorem
• Cholesky decomposition
• Circles of given radius through two points
• Closest-pair problem
• Collections
• Combinations
• Combinations and permutations
• Combinations with repetitions
• Comma quibbling
• Command-line arguments
• Comments
• Compare a list of strings
• Compound data type
• Conditional structures
• Conjugate transpose
• Continued fraction
• Convert seconds to compound duration
• Copy a string
• Count occurrences of a substring
• Count the coins
• Create a two-dimensional array at runtime
• Create an HTML table
• Create an object/Native demonstration
• Cumulative standard deviation
• Currying
• Date format
• Date manipulation
• Day of the week
• Deepcopy
• Define a primitive data type
• Department Numbers
• Detect division by zero
• Determinant and permanent
• Determine if a string is numeric
• Digital root
• Digital root/Multiplicative digital root
• Dinesman's multiple-dwelling problem
• Dot product
• Dragon curve
• Draw a sphere
• Dynamic variable names
• Element-wise operations
• Elementary cellular automaton
• Emirp primes
• Empty program
• Empty string
• Enforced immutability
• Entropy
• Enumerations
• Environment variables
• Equilibrium index
• Euler method
• Euler's identity
• Euler's sum of powers conjecture
• Evaluate binomial coefficients
• Even or odd
• Exceptions
• Exceptions/Catch an exception thrown in a nested call
• Exponentiation operator
• Exponentiation order
• Extensible prime generator
• Extract file extension
• Extreme floating point values
• FASTA format
• Factorial
• Factors of an integer
• Fast Fourier transform
• Fibonacci n-step number sequences
• Fibonacci sequence
• Fibonacci word
• Filter
• Find common directory path
• Find limit of recursion
• Find the intersection of two lines
• Find the last Sunday of each month
• Find the missing permutation
• First class environments
• First-class functions/Use numbers analogously
• Five weekends
• Fixed length records
• FizzBuzz
• Flatten a list
• Flow-control structures
• Floyd's triangle
• Floyd-Warshall algorithm
• Formal power series
• Formatted numeric output
• Forward difference
• Four bit adder
• Fractal tree
• Function composition
• Function definition
• Gamma function
• Generate lower case ASCII alphabet
• Generator/Exponential
• Generic swap
• Globally replace text in several files
• Greatest common divisor
• Greatest element of a list
• Greatest subsequential sum
• Guess the number
• Hamming numbers
• Happy numbers
• Harshad or Niven series
• Hash from two arrays
• Hash join
• Haversine formula
• Hello world!
• Hello world/Graphical
• Hello world/Newbie
• Hello world/Newline omission
• Hello world/Standard error
• Hello world/Text
• Here document
• Heronian triangles
• Hickerson series of almost integers
• Higher-order functions
• Hofstadter Q sequence
• Hostname
• I before E except after C
• IBAN
• Identity matrix
• Idiomatically determine all the characters that can be used for symbols
• Implicit type conversion
• Include a file
• Increment a numerical string
• Infinity
• Input loop
• Integer comparison
• Integer sequence
• Inverted index
• Inverted syntax
• Iterated digits squaring
• JSON
• Jaro distance
• Jensen's Device
• JortSort
• Josephus problem
• Julia set
• Jump anywhere
• Kaprekar numbers
• Knapsack problem/0-1
• Knapsack problem/Continuous
• Kronecker product
• LU decomposition
• LZW compression
• Langton's ant
• Largest int from concatenated ints
• Last Friday of each month
• Last letter-first letter
• Leap year
• Least common multiple
• Left factorials
• Leonardo numbers
• Letter frequency
• Levenshtein distance
• Linear congruential generator
• List comprehensions
• Literals/Floating point
• Literals/Integer
• Literals/String
• Logical operations
• Long multiplication
• Longest Common Substring
• Longest common prefix
• Longest common subsequence
• Longest increasing 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/N plus one half
• Loops/Nested
• Loops/While
• Luhn test of credit card numbers
• Lychrel numbers
• Magic squares of odd order
• Mandelbrot set
• Map range
• Matrix multiplication
• Matrix transposition
• Matrix-exponentiation operator
• Maximum triangle path sum
• McNuggets Problem
• Menu
• Middle three digits
• Move-to-front algorithm
• Multi-dimensional array
• Multifactorial
• Multiple distinct objects
• Multisplit
• Munchausen numbers
• Munching squares
• Mutual recursion
• N'th
• N-queens problem
• Named parameters
• Naming conventions
• Narcissistic decimal number
• Native shebang
• Natural sorting
• Negative base numbers
• Nested function
• Non-continuous subsequences
• Non-decimal radices/Convert
• Nth root
• Null object
• Number names
• Number reversal game
• One-dimensional cellular automata
• Operator precedence
• Optional parameters
• Order disjoint list items
• Order two numerical lists
• Ordered Partitions
• Ordered words
• Palindrome detection
• Pangram checker
• Paraffins
• Pascal matrix generation
• Pascal's triangle
• Pathological floating point problems
• Perfect numbers
• Permutation test
• Permutations
• Permutations by swapping
• Permutations with repetitions
• Permutations/Derangements
• Pernicious numbers
• Phrase reversals
• Pi
• Plot coordinate pairs
• Polymorphism
• Population count
• Power set
• Price fraction
• Primality by trial division
• Prime decomposition
• Priority queue
• Problem of Apollonius
• Program termination
• Proper divisors
• Pythagorean quadruples
• Pythagorean triples
• Quaternion type
• Queue/Definition
• Quickselect algorithm
• Random number generator (device)
• Random numbers
• Range expansion
• Range extraction
• Ranking methods
• Read a configuration file
• Read a file character by character/UTF8
• Read a file line by line
• Read a specific line from a file
• Read entire file
• Real constants and functions
• Regular expressions
• Remove duplicate elements
• Remove lines from a file
• Rep-string
• Repeat
• Repeat a string
• Return multiple values
• Reverse a string
• Reverse words in a string
• Roman numerals/Decode
• Roots of a function
• Roots of a quadratic function
• Roots of unity
• Rosetta Code/Count examples
• Rot-13
• Run-length encoding
• Runge-Kutta method
• SEDOLs
• Sailors, coconuts and a monkey problem
• Same Fringe
• Scope/Function names and labels
• Search a list
• Search a list of records
• Self-describing numbers
• Self-referential sequence
• Semordnilap
• Sequence of non-squares
• Sequence of primes by trial division
• Set
• Set consolidation
• Shell one-liner
• Short-circuit evaluation
• Show the epoch
• Sierpinski carpet
• Sieve of Eratosthenes
• Singly-linked list/Traversal
• Solve the no connection puzzle
• Sort a list of object identifiers
• Sort an array of composite structures
• Sort an integer array
• Sort disjoint sublist
• Sort stability
• Sort three variables
• Sort using a custom comparator
• Sorting Algorithms/Circle Sort
• Sorting algorithms/Bead sort
• Sorting algorithms/Bubble sort
• Sorting algorithms/Cocktail sort
• Sorting algorithms/Comb sort
• Sorting algorithms/Counting sort
• Sorting algorithms/Gnome sort
• Sorting algorithms/Insertion sort
• Sorting algorithms/Merge sort
• Sorting algorithms/Pancake sort
• Sorting algorithms/Permutation sort
• Sorting algorithms/Quicksort
• Sorting algorithms/Radix sort
• Sorting algorithms/Selection sort
• Sorting algorithms/Shell sort
• Sorting algorithms/Sleep sort
• Sorting algorithms/Stooge sort
• Sorting algorithms/Strand sort
• Sparkline in unicode
• Special characters
• Special variables
• Spiral matrix
• Split a character string based on change of character
• Square-free integers
• Stair-climbing puzzle
• State name puzzle
• Stem-and-leaf plot
• Stern-Brocot sequence
• String append
• String case
• String comparison
• String concatenation
• String interpolation (included)
• String length
• String matching
• String prepend
• 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
• Subleq
• Substring
• Substring/Top and tail
• Sum and product of an array
• Sum digits of an integer
• Sum multiples of 3 and 5
• Sum of a series
• Sum of squares
• Sum to 100
• Symmetric difference
• System time
• Taxicab numbers
• Terminal control/Unicode output
• Ternary logic
• Test a function
• Test integerness
• Text between
• Text processing/1
• Text processing/2
• Text processing/Max licenses in use
• Textonyms
• The Twelve Days of Christmas
• Tokenize a string
• Tokenize a string with escaping
• Top rank per group
• Topic variable
• Topological sort
• Topswops
• Trabb Pardo–Knuth algorithm
• Tree traversal
• Trigonometric functions
• Twelve statements
• URL decoding
• URL encoding
• Undefined values
• Unicode strings
• Unicode variable names
• Van der Corput sequence
• Variables
• Variadic function
• Vector
• Vector products
• Web scraping
• Wireworld
• Word wrap
• Write float arrays to a text file
• Yin and yang
• Zebra puzzle
• Zeckendorf number representation
• Zero to the zero power
• Zig-zag matrix