I'm working on modernizing Rosetta Code's infrastructure. Starting with communications. Please accept this time-limited open invite to RC's Slack.. --Michael Mol (talk) 20:59, 30 May 2020 (UTC)

Rosetta Code/Count examples/Full list

From Rosetta Code

Full output for the Rosetta Code/Count examples#Raku task. Updated periodically.

This is something of a experiment. The languages have their completed task entries marked with a circled digit in the table so you can sort on the language to see which tasks have been done. Hold down control and click on several columns to do secondary, tertiary, etc. sorts.

Languages that omit a certain task have an uppercase O filled in for that task.

Ideally it would be nice to be able to generate the table on demand for any language but it is fairly intensive to generate. Once a week is ok, on demand would be unsustainable.

More than about 10 languages per page gets unwieldy and difficult to navigate. Generate reports for the top N languages in groups of 10. (N == 40 for now.)

See Rosetta_Code/Rank_languages_by_popularity/Full_list for a full language/task completion table.

Top tier Second tier Third tier Fourth tier
First ten programming languages by number of task examples completed:
    ① Phix          ② Wren          ③ Julia         ④ Raku          ⑤ Go           
    ⑥ Perl          ⑦ Nim           ⑧ Python        ⑨ C             ⑩ REXX         
As of 2022-05-15T20:28:17Z :: Tasks: 1182 :: Draft Tasks:348 :: Total Tasks: 1530 :: Total Examples: 85867
Count Task
524 Hello world/Text
345 99 bottles of beer
335 FizzBuzz
325 100 doors
308 Fibonacci sequence
299 Factorial
289 Comments
277 A+B
275 Empty program
251 Function definition
241 Loops/Infinite
236 Reverse a string
235 Arrays
235 Loops/While
234 Ackermann function
222 Loops/For
213 Conditional structures
213 Greatest common divisor
208 Greatest element of a list
206 Arithmetic/Integer
203 Even or odd
201 Array concatenation
193 Integer comparison
193 Repeat a string
189 Averages/Arithmetic mean
189 Increment a numerical string
189 Sieve of Eratosthenes
185 Copy a string
184 Hello world/Graphical
178 Binary digits
177 Boolean values
176 Loops/Downward for
175 Array length
175 Character codes
175 Towers of Hanoi
174 Sum and product of an array
173 Apply a callback to an array
172 Hello world/Newline omission
172 String concatenation
171 Integer sequence
171 Palindrome detection
170 Loops/Do-while
170 Loops/For with a specified step
170 Rot-13
170 String length
170 Tokenize a string
169 Loops/N plus one half
168 Loops/Foreach
168 Sum of a series
166 Empty string
166 Generic swap
166 String case
165 Loops/Break
165 Quine
164 Sum of squares
162 Dot product
161 Hailstone sequence
161 Leap year
159 Logical operations
157 Filter
156 Associative array/Creation
155 Roman numerals/Encode
155 Sorting algorithms/Bubble sort
154 Factors of an integer
153 Caesar cipher
153 Sort an integer array
151 System time
150 Execute a system command
149 Loop over multiple arrays simultaneously
149 Luhn test of credit card numbers
149 Remove duplicate elements
148 Higher-order functions
147 Sorting algorithms/Quicksort
147 Stack
146 Determine if a string is numeric
146 Guess the number
145 Primality by trial division
145 Zero to the zero power
144 User input/Text
143 File input/output
143 Generate lower case ASCII alphabet
143 Read entire file
142 Bitwise operations
142 Command-line arguments
142 Happy numbers
141 Check that file exists
141 Substring
140 Hello world/Standard error
140 Mutual recursion
139 Day of the week
139 Loops/Continue
138 Create a file
137 Sleep
136 Least common multiple
135 ABC problem
134 Balanced brackets
134 Ethiopian multiplication
134 Pascal's triangle
133 Date format
132 Flatten a list
132 Literals/String
132 Variables
131 Binary search
131 Program termination
130 Roman numerals/Decode
129 Knuth shuffle
128 Compound data type
128 Include a file
128 Literals/Integer
127 Function composition
127 Loops/Nested
127 Mandelbrot set
127 N-queens problem
126 Count in octal
126 Count occurrences of a substring
126 Multiplication tables
125 Detect division by zero
125 Matrix transposition
125 Pick random element
125 Read a file line by line
125 Sorting algorithms/Insertion sort
124 Anagrams
124 Associative array/Iteration
124 Averages/Root mean square
124 Formatted numeric output
123 Matrix multiplication
123 Real constants and functions
122 Guess the number/With feedback
122 Haversine formula
122 Letter frequency
122 Null object
121 Align columns
121 Case-sensitivity of identifiers
121 Identity matrix
121 Return multiple values
121 Search a list
120 Assertions
120 File size
120 Look-and-say sequence
120 Pangram checker
119 Averages/Median
119 Classes O
119 Hash from two arrays
119 Perfect numbers
119 String matching
118 Babbage problem
118 Delete a file
118 Environment variables
117 Find limit of recursion
117 Sierpinski triangle
116 Conway's Game of Life
116 Input loop
115 HTTP
114 Permutations
114 String append
113 Arithmetic/Complex
113 Catalan numbers
113 Rename a file
113 Strip a set of characters from a string
113 Temperature conversion
112 Call a function
112 Evaluate binomial coefficients
112 Infinity
112 Levenshtein distance
112 Random numbers
111 Accumulator factory
111 Anonymous recursion
111 Hostname
111 Run-length encoding
111 String interpolation (included)
111 Substring/Top and tail
110 Harshad or Niven series
110 Horner's rule for polynomial evaluation
110 Reverse words in a string
110 Variadic function
109 Arithmetic-geometric mean
109 Averages/Pythagorean means
109 The Twelve Days of Christmas
108 Comma quibbling
108 N'th
108 Nth root
108 Program name
108 Strip whitespace from a string/Top and tail
108 Sum multiples of 3 and 5
108 Zig-zag matrix
107 Bulls and cows
107 Create a two-dimensional array at runtime
107 Prime decomposition
107 Queue/Definition
107 Sorting algorithms/Merge sort
106 Ordered words
106 Sierpinski carpet
106 Vector products
105 Combinations
105 Exceptions
105 Regular expressions
105 Sequence of non-squares
105 Trigonometric functions
104 Middle three digits
104 Sorting algorithms/Selection sort
104 Sum digits of an integer
103 Digital root
103 Shell one-liner
103 String prepend
102 24 game
102 Amicable pairs
102 Power set
101 Abundant, deficient and perfect number classifications
101 Evolutionary algorithm
101 Execute Brain****
101 Short-circuit evaluation
100 Enumerations
100 Sorting algorithms/Gnome sort
100 Walk a directory/Non-recursively
100 Y combinator
99 Arbitrary-precision integers (included)
99 Range extraction
98 Almost prime
98 Interactive programming O
98 Range expansion
97 Calculating the value of e
97 Collections
97 Symmetric difference
96 Create an HTML table
96 Hello world/Newbie
96 Hofstadter Q sequence
96 One-dimensional cellular automata
96 Sort using a custom comparator
96 Sorting algorithms/Cocktail sort
96 Time a function
95 Averages/Mode
95 Dragon curve
95 Exponentiation operator
95 First-class functions
95 MD5
95 Random number generator (included)
94 Entropy
94 Monty Hall problem
93 Forward difference
93 Gray code
93 Hamming numbers
93 Price fraction
93 String comparison
93 Tree traversal
92 Cumulative standard deviation
92 Inheritance/Single
92 Last Friday of each month
92 Number names
92 Number reversal game
92 Sorting algorithms/Bogosort
91 Averages/Simple moving average
91 CSV data manipulation
91 Langton's ant
91 Sorting algorithms/Heapsort
90 Abstract type
90 Catamorphism
90 Greatest subsequential sum
90 JSON
90 Map range
89 Compare a list of strings
89 Five weekends
89 Floyd's triangle
89 Josephus problem
89 Menu
89 Simple windowed application
89 Terminal control/Clear the screen
88 Repeat
87 Address of a variable
87 Anti-primes
87 Count in factors
87 Find the last Sunday of each month
87 Non-decimal radices/Convert
87 Show ASCII table
87 Sort an array of composite structures
87 URL decoding
86 Modular inverse
86 Monte Carlo methods
86 Order two numerical lists
86 Queue/Usage
86 Set
86 Split a character string based on change of character
86 Top rank per group
86 Walk a directory/Recursively
85 CSV to HTML translation
85 Read a specific line from a file
85 SEDOLs
84 Box the compass
84 Closures/Value capture
84 File modification time
84 Hello world/Line printer
84 Munchausen numbers
84 Playing cards
84 Sorting algorithms/Shell sort
84 Window creation
84 Word wrap
83 Bitmap
83 Count the coins
83 Here document O
83 Introspection
83 Operator precedence
83 Proper divisors
83 Singly-linked list/Traversal
83 Spiral matrix
83 Terminal control/Ringing the terminal bell
82 Find the missing permutation
82 Literals/Floating point
82 Lucas-Lehmer test
82 Multifactorial
82 Pythagorean triples
81 Concurrent computing
81 Department numbers
81 Extend your language
81 Find common directory path
81 Population count
81 Sockets
81 Soundex
81 URL encoding
81 Web scraping
80 CRC-32
80 Dynamic variable names O
80 Kaprekar numbers
80 Linear congruential generator
80 Long multiplication
80 Man or boy test
80 Pi
80 Roots of unity
80 Sorting algorithms/Comb sort
80 Sorting algorithms/Counting sort
79 Anagrams/Deranged anagrams
79 Date manipulation
79 Jensen's Device
79 Keyboard input/Obtain a Y or N response
79 Knapsack problem/0-1
79 Show the epoch
79 Take notes on the command line
79 XML/Input
78 Call an object method O
78 Empty directory
78 Equilibrium index
78 Execute HQ9+
78 Fibonacci n-step number sequences
78 Guess the number/With feedback (player)
78 Jump anywhere
78 Parsing/RPN calculator algorithm
78 Phrase reversals
78 Semordnilap
78 Strip comments from a string
78 Sudoku
78 Trabb Pardo–Knuth algorithm
78 Unicode variable names
78 Write entire file
77 Animation
77 Gamma function
77 Hello world/Web server
77 List comprehensions
77 Rep-string
77 Rock-paper-scissors
77 SHA-1
77 Sort disjoint sublist
77 Thue-Morse
77 Zeckendorf number representation
76 Averages/Mean angle
76 Convert seconds to compound duration
76 Flow-control structures
76 Non-decimal radices/Output
76 Old lady swallowed a fly
76 Read a configuration file
76 Singly-linked list/Element definition
76 Special characters
76 Vigenère cipher
75 15 puzzle game
75 AKS test for primes
75 Calendar
75 Combinations with repetitions
75 Draw a sphere
75 Euler's sum of powers conjecture
75 Multiple distinct objects
75 Priority queue
75 Quaternion type
75 Square but not cube
74 100 prisoners
74 Call a foreign-language function
74 Currying
74 Enforced immutability
74 Four bit adder
74 Pernicious numbers
74 Stair-climbing puzzle
73 Benford's law
73 Exceptions/Catch an exception thrown in a nested call
73 Fractal tree
73 Longest common subsequence
73 SHA-256
73 Sequence of primes by trial division
73 Special variables
72 Attractive numbers
72 Bitmap/Bresenham's line algorithm
72 General FizzBuzz
72 Horizontal sundial calculations
72 IBAN
72 Largest int from concatenated ints
72 Narcissistic decimal number
72 Sort three variables
72 Sorting algorithms/Stooge sort
72 Write float arrays to a text file
71 Angle difference between two bearings
71 Arithmetic/Rational
71 Barnsley fern
71 Catalan numbers/Pascal's triangle
71 Chinese remainder theorem
71 Fork
71 Jewels and stones
71 Maze generation
71 Polymorphism
71 Self-describing numbers
71 Sorting algorithms/Pancake sort
71 Text processing/Max licenses in use
71 Unix/ls
71 Van der Corput sequence
70 Amb
70 Closest-pair problem
70 Constrained random points on a circle
70 Magic squares of odd order
70 Named parameters
70 Nested function
70 Numerical integration
70 Runtime evaluation O
70 Stern-Brocot sequence
70 Yin and yang
69 Damm algorithm
69 Exponentiation order
69 Hofstadter-Conway $10,000 sequence
69 I before E except after C
69 One of n lines in a file
69 Singly-linked list/Element insertion
69 Van Eck sequence
68 Abundant odd numbers
68 Continued fraction
68 Euler method
68 Fast Fourier transform
68 ISBN13 check digit
68 Morse code
68 Remove lines from a file
68 Sort stability
68 Strip control codes and extended characters from a string
68 Variable size/Get
67 Circles of given radius through two points
67 Documentation
67 Get system command output
67 Host introspection
67 Memory allocation
67 Probabilistic choice
67 Roots of a function
67 Word frequency
67 Write language name in 3D ASCII
66 Animate a pendulum
66 Best shuffle
66 Factors of a Mersenne number
66 HTTPS
66 Inheritance/Multiple
66 Optional parameters
66 Plot coordinate pairs
66 Semiprime
66 Tic-tac-toe
66 Two sum
66 XML/Output
65 Additive primes
65 Binary strings
65 Extract file extension
65 Gapful numbers
65 Globally replace text in several files
65 Knight's tour
65 Modular exponentiation
65 RPG attributes generator
65 Roots of a quadratic function
65 Subleq
64 CUSIP
64 Cholesky decomposition
64 Integer overflow
64 Leonardo numbers
64 Long year
64 Magic 8-ball
64 McNuggets problem
64 Miller–Rabin primality test
64 Reduced row echelon form
64 Runge-Kutta method
64 Smith numbers
64 Sorting algorithms/Sleep sort
64 Test a function
64 Undefined values
63 24 game/Solve
63 Arithmetic evaluation
63 Averages/Mean time of day
63 Cartesian product of two or more lists
63 Determine if a string is collapsible
63 Dutch national flag problem
63 Emirp primes
63 Huffman coding
63 Longest common prefix
63 Ludic numbers
63 Non-decimal radices/Input
63 Terminal control/Display an extended character
62 2048
62 9 billion names of God the integer
62 Bitmap/Write a PPM file
62 Generator/Exponential
62 Isqrt (integer square root) of X
62 JortSort
62 Knapsack problem/Continuous
62 Knapsack problem/Unbounded
62 Mouse position
62 Partial function application
62 Truncatable primes
61 Brownian tree
61 Chinese zodiac
61 Compile-time calculation O
61 Determine if a string has all the same characters
61 Draw a clock
61 Draw a cuboid
61 Sorting algorithms/Bead sort
61 Unicode strings
61 User input/Graphical
60 4-rings or 4-squares puzzle
60 Add a variable to a class instance at runtime O
60 Copy stdin to stdout
60 Define a primitive data type O
60 Fibonacci word
60 Kernighans large earthquake problem
60 Left factorials
60 Mad Libs
60 Matrix-exponentiation operator
60 Pascal matrix generation
60 Truncate a file
60 Vector
59 Base64 decode data
59 Base64 encode data
59 Deal cards for FreeCell
59 Doubly-linked list/Element definition
59 Pointers and references
59 Quickselect algorithm
59 Random number generator (device)
59 Scope modifiers
59 Stem-and-leaf plot
59 Tau function
59 Terminal control/Coloured text
59 Ternary logic
59 Topological sort
59 Two identical strings
58 DNS query
58 Dinesman's multiple-dwelling problem
58 Discordian date
58 Draw a pixel
58 Forest fire
58 Grayscale image
58 Hash join
58 Iterated digits squaring
58 LZW compression
58 Multisplit
58 Nim game
58 Odd word problem
58 Sorting algorithms/Permutation sort
58 Terminal control/Cursor positioning
58 Unbias a random generator
58 Universal Turing machine
57 Bernoulli numbers
57 Convert decimal number to rational
57 Delegates
57 FASTA format
57 Keyboard input/Keypress check
57 Munching squares
57 Rosetta Code/Rank languages by popularity
57 Runtime evaluation/In an environment O
57 Sattolo cycle
57 Singleton
57 Tokenize a string with escaping
56 Archimedean spiral
56 Call a function in a shared library
56 Cantor set
56 Dijkstra's algorithm
56 Extreme floating point values
56 Handle a signal
56 Inverted syntax
56 Longest common substring
56 Loops/Increment loop index within loop body
56 Maximum triangle path sum
56 Modulinos
56 Perfect shuffle
56 Stack traces
56 Validate International Securities Identification Number
56 XML/XPath
55 Fusc sequence
55 Non-continuous subsequences
55 Seven-sided dice from five-sided dice
55 Sort numbers lexicographically
55 Statistics/Basic
55 Sum of first n cubes
55 Synchronous concurrency
54 Chaos game
54 Determine if a string has all unique characters
54 Find the intersection of two lines
54 First-class functions/Use numbers analogously O
54 Largest proper divisor of n
54 Move-to-front algorithm
54 Password generator
54 Pig the dice game
54 Polynomial regression
54 Recaman's sequence
54 Remove vowels from a string
54 Search a list of records
54 Send email
54 Shoelace formula for polygonal area
54 Strip block comments
54 Sum of divisors
54 Text processing/2
54 Water collected between towers
54 Wireworld
54 XML/DOM serialization
53 Abbreviations, automatic
53 Associative array/Merging
53 Dining philosophers
53 Doubly-linked list/Element insertion
53 Egyptian division
53 Fractran
53 Gaussian elimination
53 Heronian triangles
53 Hofstadter Figure-Figure sequences
53 Jaro similarity
53 Longest increasing subsequence
53 Primality by Wilson's theorem
53 Rate counter
52 Bell numbers
52 Colour bars/Display
52 Convex hull
52 Days between dates
52 Determinant and permanent
52 Extensible prime generator
52 Farey sequence
52 Holidays related to Easter
52 Kronecker product
52 Longest string challenge
52 Make directory path
52 Metaprogramming
52 Naming conventions
52 Sierpinski triangle/Graphical
52 Text processing/1
52 Zebra puzzle
51 Determine if a string is squeezable
51 Doubly-linked list/Traversal
51 Execute a Markov algorithm
51 GUI component interaction
51 Respond to an unknown method call O
51 Words containing "the" substring
50 Append a record to the end of a text file
50 Echo server
50 Floyd-Warshall algorithm
50 Greyscale bars/Display
50 Last letter-first letter
50 Stable marriage problem
50 Tau number
50 Taxicab numbers
50 Visualize a tree
49 Digital root/Multiplicative digital root
49 Doubly-linked list/Definition
49 History variables O
49 Loops/With multiple ranges
49 Mertens function
49 OpenGL
49 Polynomial long division
49 Sparkline in unicode
49 Strange plus numbers
49 Text between
49 Ulam spiral (for primes)
48 Abbreviations, easy
48 Active object
48 Average loop length
48 Bitmap/Flood fill
48 Determine if only one instance is running
48 Element-wise operations
48 Elementary cellular automaton
48 Generate Chess960 starting position
48 Image noise
48 Musical scale
48 Polymorphic copy
48 Send an unknown method call O O
48 Sum of the digits of n is substring of n
48 Totient function
48 Verify distribution uniformity/Naive
47 Bitmap/Read a PPM file
47 Chowla numbers
47 Hilbert curve
47 Narcissist
47 Perfect totient numbers
47 Problem of Apollonius
47 Set consolidation
47 Sorting algorithms/Radix sort
47 Spinning rod animation/Text
47 Sum to 100
46 Aliquot sequence classifications
46 Bulls and cows/Player
46 Currency
46 Deepcopy
46 Flipping bits game
46 Keyboard input/Flush the keyboard buffer
46 Parsing/Shunting-yard algorithm
46 Rosetta Code/Count examples
46 Sorting Algorithms/Circle Sort
46 Speech synthesis
46 Start from a main routine O
46 Subtractive generator
46 Terminal control/Dimensions
46 The Name Game
46 Twelve statements
46 UTF-8 encode and decode
45 21 game
45 Approximate equality
45 Bitmap/Midpoint circle algorithm
45 Carmichael 3 strong pseudoprimes
45 Casting out nines
45 Color of a screen pixel
45 Compiler/lexical analyzer
45 Fivenum
45 Knapsack problem/Bounded
45 Loops/Wrong ranges
45 Permutations/Derangements
45 Secure temporary file
45 Truth table
45 Variable size/Set
44 ABC words
44 Atomic updates
44 Base 16 numbers needing a to f
44 Bioinformatics/base count
44 Brazilian numbers
44 Coprimes
44 Cycle detection
44 GUI/Maximum window dimensions
44 Hickerson series of almost integers
44 Long primes
44 MD5/Implementation
44 Numbers divisible by their individual digits, but not by the product of their digits.
44 Pascal's triangle/Puzzle
44 Percentage difference between images
44 Permutations by swapping
44 Ranking methods
44 S-expressions
44 Sailors, coconuts and a monkey problem
44 Sort a list of object identifiers
44 Summarize and say sequence
44 Type detection
44 Voronoi diagram
43 Balanced ternary
43 Combinations and permutations
43 Euler's identity
43 Find words which contains more than 3 e vowels
43 Humble numbers
43 Idiomatically determine all the lowercase and uppercase letters
43 Inverted index
43 Julia set
43 Largest number divisible by its digits
43 MAC Vendor Lookup
43 Primorial numbers
43 Pythagorean quadruples
43 Read a file character by character/UTF8
43 Safe primes and unsafe primes
43 Smallest square that begins with n
43 Strange numbers
43 Table creation/Postal addresses
43 Terminal control/Inverse video
43 Yellowstone sequence
42 Brace expansion
42 Calendar - for "REAL" programmers O
42 Colour pinstripe/Display
42 Cramer's rule
42 File extension is in extensions list
42 Find the intersection of a line with a plane
42 GUI enabling/disabling of controls
42 Halt and catch fire
42 Lah numbers
42 Magic squares of doubly even order
42 Parallel calculations
42 Permutations with repetitions
42 Prime conspiracy
42 Sequence: smallest number with exactly n divisors
42 Statistics/Normal distribution
42 Substitution cipher
42 Topswops
42 Triplet of three numbers
42 Variable-length quantity
41 Abbreviations, simple
41 Four is magic
41 Input/Output for lines of text
41 Input/Output for pairs of numbers
41 Kahan summation
41 Nice primes
41 Palindrome dates
41 Parametric polymorphism O O
41 Permutation test
41 Ray-casting algorithm
41 Rosetta Code/Find bare lang tags
41 Scope/Function names and labels
41 Sorting algorithms/Strand sort
41 Special divisors
41 Terminal control/Hiding the cursor
40 Bitwise IO
40 Cheryl's birthday
40 Create a file on magnetic tape
40 Cuban primes
40 Display a linear combination
40 Factorions
40 Feigenbaum constant calculation
40 Find words which contains all the vowels
40 Function prototype O
40 Integer roots
40 Knuth's algorithm S
40 LU decomposition
40 Lychrel numbers
40 Metered concurrency
40 Multiple regression
40 Numbers which binary and ternary digit sum are prime
40 Pathological floating point problems
40 Penney's game
40 Primes whose sum of digits is 25
40 Product of divisors
40 Pythagoras tree
40 QR decomposition
40 Sequence: smallest number greater than previous term with exactly n divisors
40 Solve the no connection puzzle
40 Test integerness
40 Vampire number
39 Break OO privacy O
39 Check output device is a terminal
39 Cousin primes
39 Events
39 Extra primes
39 Fibonacci word/fractal
39 Find palindromic numbers in both binary and ternary bases
39 Maze solving
39 Minesweeper game
39 Multi-dimensional array
39 Order disjoint list items
39 Parsing/RPN to infix conversion
39 Sutherland-Hodgman polygon clipping
39 Unique characters
38 Church numerals
38 Constrained genericity O O O
38 Entropy/Narcissist
38 Find prime n such that reversed n is also prime
38 Find prime numbers of the form n*n*n+2
38 Frobenius numbers
38 Koch curve
38 Longest common suffix
38 Matrix with two diagonals
38 Metronome
38 Minimum number of cells after, before, above and below NxN squares
38 Numerical integration/Gauss-Legendre Quadrature
38 Pentagram
38 Pinstripe/Display
38 Square-free integers
38 Subset sum problem
38 Terminal control/Unicode output
37 Apply a digital filter (direct form II transposed)
37 Bitmap/Bézier curves/Cubic
37 Conjugate transpose
37 Determine if two triangles overlap
37 Digit fifth powers
37 Diversity prediction theorem
37 Find words with alternating vowels and consonants
37 MD4
37 Multiline shebang
37 Mutex
37 Negative base numbers
37 Object serialization O O
37 Old Russian measure of length
37 Ordered partitions
37 RSA code
37 Shift list elements to left by 3
37 Smarandache prime-digital sequence
37 Sorting algorithms/Patience sort
37 Strong and weak primes
36 Arithmetic-geometric mean/Calculate Pi
36 Bacon cipher
36 Circular primes
36 Continued fraction/Arithmetic/Construct from rational number
36 Count how many vowels and consonants occur in a string
36 Eban numbers
36 Egyptian fractions
36 Gauss-Jordan matrix inversion
36 Length of an arc between two angles
36 Mersenne primes
36 Modular arithmetic
36 Odd and square numbers
36 Parameterized SQL statement
36 Pell's equation
36 RIPEMD-160
36 Sum of elements below main diagonal of matrix
35 AVL tree
35 Alternade words
35 Change e letters to i in words
35 Chaocipher
35 Decimal floating point number to binary
35 Dice game probabilities
35 Machine code
35 Minimum positive multiple in base 10 using only 0 and 1
35 Möbius function
35 Partition an integer x into n primes
35 Pattern matching O O
35 Poker hand analyser
35 Reflection/List properties O
35 Set puzzle
35 Sorting algorithms/Cycle sort
35 Successive prime differences
35 Terminal control/Preserve screen
35 Textonyms
35 Topic variable O
35 Use another language to call a function
35 Zumkeller numbers
34 Bitmap/Histogram
34 Check input device is a terminal
34 Compare length of two strings
34 Create an object at a given address O
34 Draw a rotating cube
34 Faulhaber's triangle
34 Find words whose first and last three letters are equal
34 First power of 2 that has leading decimal digits of 12
34 Galton box animation
34 Mian-Chowla sequence
34 Multiplicative order
34 Numbers with equal rises and falls
34 Numbers with prime digits whose sum is 13
34 Parallel brute force
34 Solve a Hidato puzzle
34 Straddling checkerboard
34 Superellipse
34 Terminal control/Cursor movement
34 Twin primes
34 URL parser
34 Unprimeable numbers
34 Word wheel
34 Write to Windows event log
34 Xiaolin Wu's line algorithm
34 Zhang-Suen thinning algorithm
33 Angles (geometric), normalization and conversion
33 Bin given limits
33 Bitcoin/address validation
33 Bitmap/Bézier curves/Quadratic
33 Burrows–Wheeler transform
33 Chat server
33 Death Star
33 Decision tables
33 Esthetic numbers
33 Executable library
33 Find first missing positive
33 Implicit type conversion
33 Jacobi symbol
33 Law of cosines - triples
33 Long literals, with continuations
33 Parse command-line arguments
33 Pierpont primes
33 Polyspiral
33 Primes with digits in nondecreasing order
33 Pseudo-random numbers/Middle-square method
33 Resistor mesh
33 Rosetta Code/Find unimplemented tasks
33 Set of real numbers
33 Sexy primes
33 Show the (decimal) value of a number of 1s appended with a 3, then squared
33 Simple database
33 Strange unique prime triplets
33 Super-d numbers
33 Weird numbers
33 Wieferich primes
32 Chemical calculator
32 Execute SNUSP
32 FTP
32 Faulhaber's formula
32 Find first and last set bit of a long integer
32 Find square difference
32 Generate random numbers without repeating a value
32 Go Fish
32 Keyboard macros
32 Mayan numerals
32 Nonoblock
32 Numeric error propagation
32 Peano curve
32 Pragmatic directives
32 Range consolidation
32 Rosetta Code/Fix code tags
32 Sort the letters of string in alphabetical order
32 Stirling numbers of the second kind
32 Window creation/X11
32 Word break problem
31 10001th prime
31 Arena storage pool
31 Calkin-Wilf sequence
31 Chebyshev coefficients
31 Check Machin-like formulas
31 Checkpoint synchronization
31 Common list elements
31 Common sorted list
31 Compiler/virtual machine interpreter
31 Deconvolution/1D
31 Fairshare between two and more
31 First class environments
31 HTTPS/Authenticated
31 Memory layout of a data structure
31 Minimum numbers of three lists
31 Numbers in base-16 representation that cannot be written with decimal digits
31 Partition function P
31 Perlin noise
31 Plasma effect
31 State name puzzle
31 Stirling numbers of the first kind
31 Stream merge
31 Sum and product puzzle
31 Summarize primes
31 Sylvester's sequence
31 Update a configuration file
31 Verify distribution uniformity/Chi-squared test
30 A* search algorithm
30 Abelian sandpile model
30 Birthday problem
30 De Bruijn sequences
30 Distinct power numbers
30 Fermat numbers
30 Formal power series
30 Generate random chess position
30 Honeycombs
30 Hunt the Wumpus
30 Increasing gaps between consecutive Niven numbers
30 Kronecker product based fractals
30 Magnanimous numbers
30 Motzkin numbers
30 N-smooth numbers
30 Reflection/List methods O
30 Sierpinski pentagon
30 Table creation
30 Teacup rim text
30 Words from neighbour ones
29 Active Directory/Connect
29 Color wheel
29 Find largest left truncatable prime in a given base
29 Find minimum number of coins that make a given value
29 Finite state machine
29 First perfect square in base n with n unique digits
29 Fraction reduction
29 Harmonic series
29 Merge and aggregate datasets
29 Natural sorting
29 Ramsey's theorem
29 Safe addition
29 Same fringe
29 Shortest common supersequence
29 Sorting algorithms/Cocktail sort with shifting bounds
29 Superpermutation minimisation
29 The ISAAC Cipher
29 Thiele's interpolation formula
29 Video display modes O
29 World Cup group stage
28 Almkvist-Giullera formula for pi
28 Bioinformatics/Sequence mutation
28 Cipolla's algorithm
28 Cut a rectangle
28 Day of the week of Christmas and New Year
28 Distributed programming
28 Find if a point is within a triangle
28 Find squares n where n+1 is prime
28 Fixed length records
28 Image convolution
28 Intersecting number wheels
28 Monads/Maybe monad
28 Nautical bell
28 Numbers with same digit set in base 10 and base 16
28 Palindromic gapful numbers
28 Paraffins
28 Random Latin squares
28 Sierpinski arrowhead curve
28 Snake and Ladder
28 Solve a Holy Knight's tour
28 Tonelli-Shanks algorithm
28 Unique characters in each string
28 Welch's t-test
28 Yahoo! search interface
27 Audio alarm
27 Card shuffles
27 Changeable words
27 Coprime triplets
27 Exactly three adjacent 3 in lists
27 First 9 prime Fibonacci number
27 Function frequency
27 Idiomatically determine all the characters that can be used for symbols
27 Kolakoski sequence
27 Largest five adjacent number
27 Maximum difference between adjacent elements of list
27 Minimum multiple of m where digital sum equals m
27 Neighbour primes
27 Next highest int from digits
27 Numbers in base 10 that are palindromic in bases 2, 4, and 16
27 Numeric separator syntax
27 Percolation/Mean run density
27 Piprimes
27 Ramer-Douglas-Peucker line simplification
27 Self numbers
27 Sequence of primorial primes
27 Simulate input/Keyboard
27 Sleeping Beauty problem
27 Total circles area
27 UPC
26 Base58Check encoding
26 Biorhythms
26 Deming's Funnel
26 Doomsday rule
26 Elliptic curve arithmetic
26 Hough transform
26 K-means++ clustering
26 Linux CPU utilization
26 List rooted trees
26 Lucky and even lucky numbers
26 Magic squares of singly even order
26 Make a backup file
26 Markov chain text generator
26 Matrix chain multiplication
26 Mind boggling card trick
26 Odd words
26 Order by pair comparisons
26 Padovan sequence
26 Palindromic primes
26 Parse an IP Address
26 Permutations/Rank of a permutation
26 Positive decimal integers with the digit 1 occurring exactly twice
26 Pseudo-random numbers/PCG32
26 RCRPG
26 Special neighbor primes
26 Sum of primes in odd positions is prime
26 Sum of square and cube digits of an integer are primes
26 Sunflower fractal
25 15 puzzle solver
25 ASCII art diagram converter
25 Abelian sandpile model/Identity
25 Cistercian numerals
25 Consecutive primes with ascending or descending differences
25 Elementary cellular automaton/Random Number Generator
25 Erdős-primes
25 File size distribution
25 Find words which contain the most consonants
25 Index finite lists of positive integers
25 Joystick position
25 Largest prime factor
25 Mastermind
25 Odd squarefree semiprimes
25 Palindromic primes in base 16
25 Play recorded sounds
25 Playfair cipher
25 Pseudo-random numbers/Xorshift star
25 Reflection/Get source O
25 Reverse the gender of a string
25 Smallest power of 6 whose decimal expansion contains n
25 Solve a Numbrix puzzle
25 Spelling of ordinal numbers
25 Summation of primes
25 Ulam numbers
24 Active Directory/Search for a user
24 Addition chains
24 Assertions in design by contract
24 Bilinear interpolation
24 Code Golf: Code Golf
24 Commatizing numbers
24 Compiler/syntax analyzer
24 Create an object/Native demonstration O
24 EKG sequence convergence
24 Exponentiation with infix operators in (or operating on) the base
24 Kosaraju
24 Levenshtein distance/Alignment
24 Main step of GOST 28147-89
24 Monads/List monad
24 Mosaic matrix
24 Next special primes
24 Orbital elements
24 Perceptron
24 Permuted multiples
24 Prime triplets
24 Prime words
24 Rare numbers
24 Record sound
24 SOAP
24 Sequence: nth number with exactly n divisors
24 Sokoban
24 Solve a Hopido puzzle
24 Solve triangle solitare puzzle
24 Sum data type
24 Untrusted environment
23 Canonicalize CIDR
23 Compiler/code generator
23 Concatenate two primes is also prime
23 Find adjacent primes which differ by a square integer
23 Find duplicate files
23 Knuth's power tree
23 Line circle intersection
23 Median filter
23 Names to numbers
23 Native shebang
23 Nested templated data
23 Pig the dice game/Player
23 Polynomial synthetic division
23 Prime numbers which contain 123
23 Reverse the order of lines in a text file while preserving the contents of each line
23 Sine wave
23 Singly-linked list/Element removal
23 Snake
23 Substring primes
23 Vogel's approximation method
23 Wilson primes of order n
22 Append numbers at same position in strings
22 Bitcoin/public point to address
22 Cubic special primes
22 Data Encryption Standard
22 Eertree
22 Elementary cellular automaton/Infinite length
22 Four sides of square
22 Last list item
22 Latin Squares in reduced form
22 Metallic ratios
22 Montgomery reduction
22 N-body problem
22 Numbers whose count of divisors is prime
22 Peaceful chess queen armies
22 Primes whose first and last number is 3
22 Print debugging statement
22 Pseudo-random numbers/Combined recursive generator MRG32k3a
22 Pseudo-random numbers/Splitmix64
22 Quadrat special primes
22 Simulate input/Mouse
22 Steady squares
22 The sieve of Sundaram
22 Vigenère cipher/Cryptanalysis
22 Window management
22 Zeckendorf arithmetic
21 Arithmetic coding/As a generalized change of radix
21 Cyclotomic polynomial
21 Imaginary base numbers
21 Juggler sequence
21 Just in time processing on a character stream
21 K-d tree
21 Largest difference between adjacent primes
21 Longest substrings without repeating characters
21 Matrix digital rain
21 Nimber arithmetic
21 Nonogram solver
21 Padovan n-step number sequences
21 Pancake numbers
21 Percolation/Site percolation
21 Practical numbers
21 Primes - allocate descendants to their ancestors
21 Primes which contain only one odd digit
21 Readline interface
21 Separate the house number from the street name
21 Sierpinski curve
21 Special factorials
21 Transportation problem
21 Useless instructions
21 Vibrating rectangles
20 Air mass
20 Color quantization
20 Draw pixel 2
20 Getting the number of decimals
20 Jacobsthal numbers
20 Logistic curve fitting in epidemiology
20 Monads/Writer monad
20 Most frequent k chars distance
20 P-value correction
20 Percolation/Mean cluster density
20 Print itself
20 SQL-based authentication
20 Selective file copy
20 Smallest multiple
20 Special pythagorean triplet
20 Terminal control/Positional read
20 Word search
19 Bitmap/Read an image through a pipe
19 Code segment unload
19 Compare sorting algorithms' performance
19 Compiler/AST interpreter
19 Cyclops numbers
19 Find URI in text
19 HTTPS/Client-authenticated O
19 Jaro-Winkler distance
19 Largest palindrome product
19 Largest product in a grid
19 Minimum primes
19 Own digits power sum
19 Permutations with some identical elements
19 Proof O O
19 SHA-256 Merkle tree
19 Self-hosting compiler O
19 Simulated annealing
19 Square root by hand
19 Tarjan
19 Word ladder
18 Aspect oriented programming
18 Banker's algorithm
18 Bitmap/PPM conversion through a pipe
18 Chernick's Carmichael numbers
18 Collect and sort square numbers in ascending order from three lists
18 Free polyominoes enumeration
18 Legendre prime counting function
18 Modified random distribution
18 NYSIIS
18 Particle swarm optimization
18 Percolation/Bond percolation
18 Prime numbers p for which the sum of primes less than or equal to p is prime
18 Ramanujan's constant
18 Rendezvous
18 Retrieve and search chat history
18 Sierpinski square curve
18 Smallest numbers
18 Suffix tree
18 Sum of two adjacent numbers are primes
18 Two bullet roulette
18 Variable declaration reset
18 Wordle comparison
18 XML validation
17 Ascending primes
17 Bioinformatics/Subsequence
17 Canny edge detector
17 Cullen and Woodall numbers
17 Deceptive numbers
17 Euler's constant 0.5772...
17 Fortunate numbers
17 Four is the number of letters in the ...
17 Geometric algebra
17 Longest palindromic substrings
17 Minimal steps down to 1
17 Numerical integration/Adaptive Simpson's method
17 Safe mode
16 Distribution of 0 digits in factorial series
16 Magic constant
16 Non-transitive dice
16 OpenWebNet password
16 Pandigital prime
16 Pseudorandom number generator image
16 Run as a daemon or service
16 Safe and Sophie Germain primes
16 Sort primes from list to a list
16 Text completion
16 Three word location
16 Topological sort/Extracted top item
16 Tree from nesting levels
15 Camel case and snake case
15 Continued fraction/Arithmetic/G(matrix ng, continued fraction n)
15 Determine sentence type
15 Factorial base numbers indexing permutations of a collection
15 Functional coverage tree
15 Geohash
15 Gradient descent
15 Interactive help
15 Long stairs
15 Minkowski question-mark function
15 Multi-base primes
15 Overloaded operators
15 Pisano period
15 Quoting constructs
15 Rodrigues’ rotation formula
15 Sorting algorithms/Tree sort on a linked list
15 Untouchable numbers
15 XXXX redacted
14 Audio frequency generator
14 Checksumcolor
14 Conjugate a Latin verb
14 Deconvolution/2D+
14 Descending primes
14 Display an outline as a nested table
14 Generalised floating point addition
14 Greed
14 Hourglass puzzle
14 Penrose tiling
14 Prime triangle
14 Ruth-Aaron numbers
14 Tropical algebra overloading
14 Unit testing
14 Using a speech engine to highlight words
14 VList
13 Brilliant numbers
13 Composite numbers k with no single digit factors whose factors are all substrings of k
13 Curve that touches three points
13 Curzon numbers
13 Disarium numbers
13 Earliest difference between prime gaps
13 Execute CopyPasta Language
13 Graph colouring
13 Hex words
13 Launch rocket with countdown and acceleration in stdout
13 One-time pad
13 Pentomino tiling
13 Polynomial derivative
13 Railway circuit
13 Rhonda numbers
13 Spoof game
13 Tetris
13 Time-based one-time password algorithm
13 Verhoeff algorithm
13 War card game
12 Catmull–Clark subdivision surface
12 Colorful numbers
12 Colour pinstripe/Printer
12 Combinations with repetitions/Square digit chain
12 Distinct palindromes within decimal numbers
12 Duffinian numbers
12 Euclid-Mullin sequence
12 External sort
12 Faces from a mesh
12 Fibonacci matrix-exponentiation
12 French Republican calendar
12 Mayan calendar
12 Morpion solitaire
12 Pinstripe/Printer
12 Range modifications
12 Rosetta Code/Rank languages by number of users
12 Rosetta Code/Tasks without examples
12 Suffixation of decimal numbers
12 Tree datastructures
11 Achilles numbers
11 Bioinformatics/Global alignment
11 Brace expansion using ranges
11 Count the coins/0-1
11 Equal prime and composite sums
11 Goldbach's comet
11 Home primes
11 IPC via named pipe
11 Iterators
11 Numerical and alphabetical suffixes
11 Parse EBNF
11 Powerful numbers
11 Resistance calculator
11 Simple turtle graphics
11 Square form factorization
11 Starting a web browser
11 Terminal control/Restricted width positional input/No wrapping
11 URL shortener
10 16 puzzle game
10 ADFGVX cipher
10 Discrete Fourier transform
10 Elliptic Curve Digital Signature Algorithm
10 Find Chess960 starting position identifier
10 Integer long division
10 Jaccard index
10 OpenGL/Utah Teapot
10 Ramanujan primes
10 Resistance network calculator
10 Robots
10 Set right-adjacent bits
10 Solve equations with substitution method
10 Sort an outline at every level
10 Terminal control/Restricted width positional input/With wrapping
10 Text to HTML
10 User defined pipe and redirection operators
10 Wordiff
9 Compiler/Verifying syntax
9 Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)
9 Doubly-linked list/Element removal
9 Erdös-Selfridge categorization of primes
9 Fibonacci heap
9 Multidimensional Newton-Raphson method
9 OpenGL pixel shader
9 Price list behind API
9 Rosetta Code/Run examples
9 Round-robin tournament schedule
9 Smallest enclosing circle problem
9 Tamagotchi emulator
8 Addition-chain exponentiation
8 Audio overlap loop
8 B-spline
8 Dating agency
8 Hexapawn
8 Horse racing
8 N-queens minimum and knights and bishops
8 Numbers which are not the sum of distinct squares
8 P-Adic numbers, basic
8 Ramanujan primes/twins
8 Random sentence from book
8 Raster bars
8 Recursive descent parser generator
8 Remote agent/Agent logic
8 Remote agent/Simulation
8 Repunit primes
8 Search in paragraph's text
8 Segmentation fault protection
8 Ultra useful primes
8 Waveform analysis/Doh ray me
8 WiktionaryDumps to words
7 Black Box
7 Boids
7 Chess player
7 I'm a software engineer, get me out of here
7 Latin Squares in reduced form/Randomizing using Jacobson and Matthews’ Technique
7 Pell numbers
7 Peripheral drift illusion
7 Process SMIL directives in XML data
7 Remote agent/Agent interface
7 Strassen's algorithm
7 Worthwhile task shaving
6 Compiler/Simple file inclusion pre processor
6 Create your own text control codes
6 Divide a rectangle into a number of unequal triangles
6 OLE automation
6 P-Adic square roots
6 Particle fountain
6 Solve a Rubik's Cube
6 Use a REST API
5 Cycles of a permutation
5 Dominoes
5 Erdős–Woods numbers
5 Generalised floating point multiplication
5 Multiton
5 Number triplets game
5 Rosetta Code/List authors of task descriptions
5 Smallest number k such that k+2^m is composite for all m less than k
5 Solving coin problems
5 Unicode polynomial equation
5 Waveform analysis/Top and tail
5 Weather routing
4 15 puzzle game in 3D
4 Blackjack strategy
4 CLI-based maze-game
4 Diophantine linear system solving
4 Ukkonen’s suffix tree construction
4 Uno (Card Game)
4 Vidir
3 3d turtle graphics
3 Babylonian spiral
3 Elevator simulation
3 IRC gateway
3 Sanitize user input
2 WebGL rotating F