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 Julia         ③ Wren          ④ Go            ⑤ Raku         
    ⑥ Nim           ⑦ Perl          ⑧ Python        ⑨ C             ⑩ REXX         
As of 2021-11-29T01:12:34Z :: Tasks: 1143 :: Draft Tasks:337 :: Total Tasks: 1480 :: Total Examples: 81944
Count Task
508 Hello world/Text
334 99 bottles of beer
328 FizzBuzz
321 100 doors
298 Fibonacci sequence
293 Factorial
280 Comments
271 A+B
265 Empty program
244 Function definition
237 Loops/Infinite
233 Arrays
231 Loops/While
231 Reverse a string
229 Ackermann function
217 Loops/For
211 Conditional structures
205 Arithmetic/Integer
205 Greatest common divisor
200 Greatest element of a list
197 Even or odd
196 Array concatenation
189 Averages/Arithmetic mean
189 Integer comparison
188 Repeat a string
184 Increment a numerical string
181 Hello world/Graphical
180 Copy a string
179 Sieve of Eratosthenes
176 Boolean values
173 Array length
173 Loops/Downward for
171 Binary digits
170 Character codes
169 Apply a callback to an array
169 Integer sequence
169 Towers of Hanoi
168 String concatenation
167 Loops/Do-while
167 Loops/For with a specified step
166 Hello world/Newline omission
166 Loops/Foreach
166 Loops/N plus one half
166 Rot-13
166 String length
166 Sum and product of an array
165 Palindrome detection
164 Tokenize a string
163 Loops/Break
162 Empty string
162 String case
162 Sum of a series
161 Generic swap
159 Leap year
159 Quine
158 Dot product
157 Sum of squares
156 Hailstone sequence
156 Logical operations
155 Filter
152 Associative array/Creation
152 Sort an integer array
151 Sorting algorithms/Bubble sort
150 Caesar cipher
150 Factors of an integer
150 Roman numerals/Encode
148 Execute a system command
147 Loop over multiple arrays simultaneously
146 Remove duplicate elements
145 Determine if a string is numeric
145 Guess the number
145 Higher-order functions
144 System time
143 Stack
142 Bitwise operations
142 Luhn test of credit card numbers
142 Sorting algorithms/Quicksort
141 File input/output
141 User input/Text
140 Primality by trial division
139 Hello world/Standard error
138 Generate lower case ASCII alphabet
138 Happy numbers
137 Day of the week
137 Mutual recursion
135 Check that file exists
135 Command-line arguments
135 Create a file
135 Loops/Continue
135 Read entire file
135 Substring
135 Zero to the zero power
133 Least common multiple
132 Pascal's triangle
132 Sleep
131 ABC problem
131 Balanced brackets
131 Literals/String
130 Date format
130 Flatten a list
129 Ethiopian multiplication
129 Variables
127 Include a file
127 Program termination
126 Compound data type
126 Literals/Integer
125 Binary search
125 Count in octal
125 Function composition
124 Detect division by zero
124 Knuth shuffle
124 Loops/Nested
124 Mandelbrot set
123 Count occurrences of a substring
123 Formatted numeric output
123 N-queens problem
123 Roman numerals/Decode
122 Associative array/Iteration
122 Averages/Root mean square
121 Case-sensitivity of identifiers
121 Null object
121 Sorting algorithms/Insertion sort
120 Haversine formula
120 Matrix multiplication
120 Pick random element
120 Read a file line by line
119 Anagrams
119 Identity matrix
119 Matrix transposition
119 Multiplication tables
118 Guess the number/With feedback
117 Averages/Median
117 File size
117 Hash from two arrays
117 Letter frequency
117 Real constants and functions
117 Search a list
116 Align columns
116 Assertions
116 Classes O
116 Delete a file
116 Look-and-say sequence
116 Return multiple values
116 String matching
115 Babbage problem
115 Environment variables
115 Find limit of recursion
115 Perfect numbers
114 Conway's Game of Life
114 HTTP
114 Input loop
114 Rename a file
113 Arithmetic/Complex
113 Pangram checker
112 Random numbers
111 Catalan numbers
111 Evaluate binomial coefficients
111 Hostname
110 Infinity
110 Sierpinski triangle
109 Accumulator factory
109 Arithmetic-geometric mean
109 Levenshtein distance
109 String append
108 Horner's rule for polynomial evaluation
108 Permutations
108 Reverse words in a string
108 Strip a set of characters from a string
108 Substring/Top and tail
108 Temperature conversion
107 Averages/Pythagorean means
107 Run-length encoding
107 Variadic function
106 Anonymous recursion
106 Comma quibbling
106 Harshad or Niven series
106 Program name
106 Zig-zag matrix
105 Bulls and cows
105 Nth root
105 Prime decomposition
105 Regular expressions
105 Strip whitespace from a string/Top and tail
104 Sorting algorithms/Merge sort
104 String interpolation (included)
103 Call a function
103 Combinations
103 Exceptions
103 Sum multiples of 3 and 5
103 Trigonometric functions
102 Queue/Definition
102 Sorting algorithms/Selection sort
102 The Twelve Days of Christmas
101 Create a two-dimensional array at runtime
101 N'th
101 Ordered words
100 Digital root
100 Middle three digits
100 Power set
100 Shell one-liner
100 Short-circuit evaluation
100 Sum digits of an integer
100 Vector products
99 24 game
99 Arbitrary-precision integers (included)
99 Sierpinski carpet
99 String prepend
98 Enumerations
98 Execute Brain****
98 Interactive programming O
97 Range extraction
97 Sorting algorithms/Gnome sort
97 Walk a directory/Non-recursively
97 Y combinator
96 Abundant, deficient and perfect number classifications
96 Collections
96 Range expansion
95 Create an HTML table
95 Exponentiation operator
95 First-class functions
95 Sorting algorithms/Cocktail sort
94 Averages/Mode
94 Dragon curve
94 Evolutionary algorithm
94 Hello world/Newbie
94 Sequence of non-squares
94 Time a function
93 Hofstadter Q sequence
93 One-dimensional cellular automata
93 Random number generator (included)
93 Symmetric difference
92 Cumulative standard deviation
92 Inheritance/Single
92 MD5
92 Sort using a custom comparator
91 Amicable pairs
91 Forward difference
91 Langton's ant
91 Number names
91 Sorting algorithms/Bogosort
90 Averages/Simple moving average
90 Entropy
90 Gray code
90 JSON
90 Monty Hall problem
89 Calculating the value of e
89 Catamorphism
89 Hamming numbers
89 Josephus problem
89 Map range
89 Menu
89 Price fraction
89 String comparison
88 Compare a list of strings
88 Five weekends
88 Greatest subsequential sum
88 Last Friday of each month
88 Number reversal game
88 Simple windowed application
88 Tree traversal
87 Abstract type
87 Floyd's triangle
87 Sorting algorithms/Heapsort
86 Almost prime
86 CSV data manipulation
86 Non-decimal radices/Convert
85 CSV to HTML translation
85 Count in factors
85 Queue/Usage
85 Sort an array of composite structures
85 Terminal control/Clear the screen
85 Walk a directory/Recursively
84 Address of a variable
84 Closures/Value capture
84 Find the last Sunday of each month
84 Monte Carlo methods
84 SEDOLs
84 Window creation
83 Bitmap
83 Hello world/Line printer
83 Order two numerical lists
83 URL decoding
82 Box the compass
82 File modification time
82 Introspection
82 Repeat
82 Set
82 Show ASCII table
82 Terminal control/Ringing the terminal bell
82 Top rank per group
82 Word wrap
81 Anti-primes
81 Here document O
81 Munchausen numbers
81 Operator precedence
81 Read a specific line from a file
81 Sorting algorithms/Shell sort
81 Split a character string based on change of character
81 Web scraping
80 CRC-32
80 Literals/Floating point
80 Long multiplication
80 Lucas-Lehmer test
80 Playing cards
80 Roots of unity
80 Sockets
79 Concurrent computing
79 Count the coins
79 Dynamic variable names O
79 Find common directory path
79 Jensen's Device
79 Keyboard input/Obtain a Y or N response
79 Population count
79 Pythagorean triples
79 Show the epoch
79 Singly-linked list/Traversal
79 Sorting algorithms/Counting sort
79 Spiral matrix
79 XML/Input
78 Call an object method O
78 Date manipulation
78 Find the missing permutation
78 Linear congruential generator
78 Modular inverse
78 Multifactorial
78 Soundex
78 URL encoding
77 Kaprekar numbers
77 Knapsack problem/0-1
77 Proper divisors
77 Semordnilap
77 Strip comments from a string
76 Averages/Mean angle
76 Empty directory
76 Equilibrium index
76 Execute HQ9+
76 Flow-control structures
76 Non-decimal radices/Output
76 Phrase reversals
76 Pi
76 Sorting algorithms/Comb sort
76 Sudoku
76 Unicode variable names
75 Anagrams/Deranged anagrams
75 Calendar
75 Fibonacci n-step number sequences
75 Hello world/Web server
75 Man or boy test
75 Multiple distinct objects
75 Read a configuration file
75 SHA-1
75 Sort disjoint sublist
75 Special characters
75 Take notes on the command line
75 Vigenère cipher
74 AKS test for primes
74 Animation
74 Combinations with repetitions
74 Currying
74 Enforced immutability
74 Gamma function
74 Guess the number/With feedback (player)
74 Jump anywhere
74 List comprehensions
74 Parsing/RPN calculator algorithm
74 Rock-paper-scissors
74 Write entire file
73 15 puzzle game
73 Department numbers
73 Euler's sum of powers conjecture
73 Exceptions/Catch an exception thrown in a nested call
73 Four bit adder
73 Fractal tree
73 Rep-string
73 SHA-256
73 Singly-linked list/Element definition
73 Stair-climbing puzzle
73 Thue-Morse
73 Trabb Pardo–Knuth algorithm
73 Zeckendorf number representation
72 Bitmap/Bresenham's line algorithm
72 Convert seconds to compound duration
72 Extend your language
72 Old lady swallowed a fly
72 Quaternion type
71 Call a foreign-language function
71 Draw a sphere
71 Horizontal sundial calculations
71 IBAN
71 Longest common subsequence
71 Polymorphism
71 Square but not cube
70 100 prisoners
70 Arithmetic/Rational
70 Catalan numbers/Pascal's triangle
70 Closest-pair problem
70 Constrained random points on a circle
70 Fork
70 Largest int from concatenated ints
70 Maze generation
70 Named parameters
70 Nested function
70 Numerical integration
70 Pernicious numbers
70 Priority queue
70 Self-describing numbers
70 Sort three variables
70 Sorting algorithms/Stooge sort
70 Write float arrays to a text file
69 Angle difference between two bearings
69 Barnsley fern
69 Benford's law
69 General FizzBuzz
69 Magic squares of odd order
69 Sorting algorithms/Pancake sort
69 Text processing/Max licenses in use
69 Van der Corput sequence
68 Chinese remainder theorem
68 Euler method
68 Morse code
68 Runtime evaluation O
68 Sequence of primes by trial division
68 Special variables
68 Unix/ls
67 Amb
67 Circles of given radius through two points
67 Fast Fourier transform
67 Hofstadter-Conway $10,000 sequence
67 Narcissistic decimal number
67 Remove lines from a file
67 Roots of a function
67 Sort stability
67 Strip control codes and extended characters from a string
67 Yin and yang
66 Attractive numbers
66 Continued fraction
66 Damm algorithm
66 Documentation
66 Factors of a Mersenne number
66 HTTPS
66 Inheritance/Multiple
66 Jewels and stones
66 Memory allocation
66 One of n lines in a file
66 Optional parameters
66 Semiprime
66 Variable size/Get
66 Write language name in 3D ASCII
65 Best shuffle
65 Exponentiation order
65 Get system command output
65 Host introspection
65 Modular exponentiation
65 Probabilistic choice
65 Roots of a quadratic function
65 Stern-Brocot sequence
65 Tic-tac-toe
65 XML/Output
64 Animate a pendulum
64 Cholesky decomposition
64 Plot coordinate pairs
64 Reduced row echelon form
64 Singly-linked list/Element insertion
64 Undefined values
64 Word frequency
63 Abundant odd numbers
63 Binary strings
63 Extract file extension
63 Globally replace text in several files
63 Non-decimal radices/Input
63 Van Eck sequence
62 24 game/Solve
62 Arithmetic evaluation
62 Bitmap/Write a PPM file
62 CUSIP
62 Cartesian product of two or more lists
62 Dutch national flag problem
62 Emirp primes
62 Gapful numbers
62 Generator/Exponential
62 I before E except after C
62 ISBN13 check digit
62 Integer overflow
62 Magic 8-ball
62 Miller–Rabin primality test
62 Mouse position
62 Runge-Kutta method
62 Sorting algorithms/Sleep sort
62 Test a function
62 Truncatable primes
62 Two sum
61 Averages/Mean time of day
61 Compile-time calculation O
61 Draw a clock
61 Long year
61 Longest common prefix
61 Partial function application
61 Terminal control/Display an extended character
61 User input/Graphical
60 2048
60 4-rings or 4-squares puzzle
60 9 billion names of God the integer
60 Add a variable to a class instance at runtime O
60 Brownian tree
60 Determine if a string has all the same characters
60 Determine if a string is collapsible
60 Huffman coding
60 JortSort
60 Knapsack problem/Continuous
60 Knapsack problem/Unbounded
60 Left factorials
60 Leonardo numbers
60 Ludic numbers
60 Sorting algorithms/Bead sort
60 Subleq
60 Unicode strings
59 Doubly-linked list/Element definition
59 Draw a cuboid
59 Knight's tour
59 Matrix-exponentiation operator
59 Pointers and references
59 Random number generator (device)
58 Base64 encode data
58 Chinese zodiac
58 Deal cards for FreeCell
58 Define a primitive data type O
58 Grayscale image
58 Hash join
58 Mad Libs
58 Multisplit
58 Odd word problem
58 Pascal matrix generation
58 Scope modifiers
58 Stem-and-leaf plot
58 Ternary logic
58 Unbias a random generator
57 Convert decimal number to rational
57 Delegates
57 Dinesman's multiple-dwelling problem
57 Discordian date
57 Fibonacci word
57 Kernighans large earthquake problem
57 LZW compression
57 McNuggets problem
57 Munching squares
57 Sierpinski triangle/Graphical
57 Singleton
57 Sorting algorithms/Permutation sort
57 Terminal control/Coloured text
57 Terminal control/Cursor positioning
57 Topological sort
57 Truncate a file
56 Base64 decode data
56 Call a function in a shared library
56 DNS query
56 Dijkstra's algorithm
56 Draw a pixel
56 Extreme floating point values
56 FASTA format
56 Forest fire
56 Keyboard input/Keypress check
56 Modulinos
56 Quickselect algorithm
56 Rosetta Code/Rank languages by popularity
56 Runtime evaluation/In an environment O
56 Stack traces
55 Bernoulli numbers
55 Copy stdin to stdout
55 Iterated digits squaring
55 Longest common substring
55 Perfect shuffle
55 Universal Turing machine
55 Validate International Securities Identification Number
55 XML/XPath
54 Archimedean spiral
54 Handle a signal
54 Inverted syntax
54 Loops/Increment loop index within loop body
54 Maximum triangle path sum
54 Non-continuous subsequences
54 Sattolo cycle
54 Seven-sided dice from five-sided dice
54 Smith numbers
54 Statistics/Basic
54 Strip block comments
54 Synchronous concurrency
54 Vector
54 Wireworld
54 XML/DOM serialization
53 Associative array/Merging
53 Dining philosophers
53 First-class functions/Use numbers analogously O
53 Heronian triangles
53 Move-to-front algorithm
53 Nim game
53 Polynomial regression
53 Send email
53 Shoelace formula for polygonal area
53 Sort numbers lexicographically
53 Text processing/2
53 Tokenize a string with escaping
52 Cantor set
52 Chaos game
52 Colour bars/Display
52 Determinant and permanent
52 Determine if a string has all unique characters
52 Find the intersection of two lines
52 Fractran
52 Gaussian elimination
52 Holidays related to Easter
52 Longest increasing subsequence
52 Naming conventions
52 Password generator
52 Pig the dice game
52 Rate counter
52 Search a list of records
52 Two identical strings
51 Additive primes
51 Doubly-linked list/Element insertion
51 Egyptian division
51 Farey sequence
51 GUI component interaction
51 Longest string challenge
51 Make directory path
51 RPG attributes generator
51 Remove vowels from a string
51 Respond to an unknown method call O
50 Days between dates
50 Doubly-linked list/Traversal
50 Hofstadter Figure-Figure sequences
50 Jaro similarity
50 Kronecker product
50 Metaprogramming
50 Primality by Wilson's theorem
50 Stable marriage problem
50 Text processing/1
50 Zebra puzzle
49 Bell numbers
49 Echo server
49 Execute a Markov algorithm
49 Extensible prime generator
49 Fusc sequence
49 Greyscale bars/Display
49 Largest proper divisor of n
49 Last letter-first letter
49 Sum of first n cubes
49 Water collected between towers
48 Append a record to the end of a text file
48 Bitmap/Flood fill
48 Determine if a string is squeezable
48 Elementary cellular automaton
48 History variables O
48 Image noise
48 OpenGL
48 Polymorphic copy
48 Polynomial long division
48 Recaman's sequence
48 Sparkline in unicode
48 Sum of divisors
48 Taxicab numbers
48 Verify distribution uniformity/Naive
48 Visualize a tree
47 Active object
47 Average loop length
47 Bitmap/Read a PPM file
47 Determine if only one instance is running
47 Doubly-linked list/Definition
47 Generate Chess960 starting position
47 Narcissist
47 Problem of Apollonius
47 Set consolidation
47 Tau number
47 Ulam spiral (for primes)
46 Currency
46 Element-wise operations
46 Flipping bits game
46 Parsing/Shunting-yard algorithm
46 Send an unknown method call O O
46 Sorting algorithms/Radix sort
46 Start from a main routine O
46 Subtractive generator
46 Sum to 100
46 Text between
45 Abbreviations, automatic
45 Bulls and cows/Player
45 Carmichael 3 strong pseudoprimes
45 Deepcopy
45 Fivenum
45 Hilbert curve
45 Isqrt (integer square root) of X
45 Keyboard input/Flush the keyboard buffer
45 Loops/With multiple ranges
45 Mertens function
45 Perfect totient numbers
45 Rosetta Code/Count examples
45 Secure temporary file
45 Speech synthesis
45 Spinning rod animation/Text
45 Terminal control/Dimensions
45 The Name Game
45 Truth table
44 Atomic updates
44 Bitmap/Midpoint circle algorithm
44 Chowla numbers
44 Digital root/Multiplicative digital root
44 GUI/Maximum window dimensions
44 Hickerson series of almost integers
44 MD5/Implementation
44 Musical scale
44 Percentage difference between images
44 Ranking methods
44 Sorting Algorithms/Circle Sort
44 Twelve statements
44 UTF-8 encode and decode
44 Words containing "the" substring
43 Aliquot sequence classifications
43 Balanced ternary
43 Brazilian numbers
43 Casting out nines
43 Color of a screen pixel
43 Combinations and permutations
43 Coprimes
43 Idiomatically determine all the lowercase and uppercase letters
43 Inverted index
43 Knapsack problem/Bounded
43 Permutations by swapping
43 Permutations/Derangements
43 S-expressions
43 Sailors, coconuts and a monkey problem
43 Sort a list of object identifiers
43 Summarize and say sequence
43 Table creation/Postal addresses
43 Totient function
43 Voronoi diagram
42 Abbreviations, easy
42 Bioinformatics/base count
42 Calendar - for "REAL" programmers O
42 Colour pinstripe/Display
42 Cramer's rule
42 Cycle detection
42 Euler's identity
42 Julia set
42 Loops/Wrong ranges
42 Parallel calculations
42 Pascal's triangle/Puzzle
42 Permutations with repetitions
41 21 game
41 Approximate equality
41 Base 16 numbers needing a to f
41 Convex hull
41 Four is magic
41 GUI enabling/disabling of controls
41 Largest number divisible by its digits
41 Long primes
41 MAC Vendor Lookup
41 Magic squares of doubly even order
41 Parametric polymorphism O O
41 Permutation test
41 Prime conspiracy
41 Primorial numbers
41 Ray-casting algorithm
41 Read a file character by character/UTF8
41 Rosetta Code/Find bare lang tags
41 Scope/Function names and labels
41 Sorting algorithms/Strand sort
41 Statistics/Normal distribution
41 Substitution cipher
41 Sum of the digits of n is substring of n
41 Tau function
41 Topswops
41 Variable size/Set
41 Variable-length quantity
40 ABC words
40 Brace expansion
40 Create a file on magnetic tape
40 Cuban primes
40 Display a linear combination
40 Feigenbaum constant calculation
40 File extension is in extensions list
40 Humble numbers
40 Input/Output for lines of text
40 Input/Output for pairs of numbers
40 Knuth's algorithm S
40 LU decomposition
40 Pathological floating point problems
40 Pythagorean quadruples
40 Sequence: smallest number with exactly n divisors
40 Terminal control/Hiding the cursor
40 Test integerness
39 Bitwise IO
39 Check output device is a terminal
39 Cousin primes
39 Events
39 Factorions
39 Fibonacci word/fractal
39 Find the intersection of a line with a plane
39 Floyd-Warshall algorithm
39 Function prototype O
39 Integer roots
39 Kahan summation
39 Lychrel numbers
39 Maze solving
39 Metered concurrency
39 Multiple regression
39 Order disjoint list items
39 Palindrome dates
39 Parsing/RPN to infix conversion
39 Penney's game
39 QR decomposition
39 Safe primes and unsafe primes
39 Sutherland-Hodgman polygon clipping
39 Terminal control/Inverse video
39 Vampire number
38 Abbreviations, simple
38 Break OO privacy O
38 Constrained genericity O O O
38 Find palindromic numbers in both binary and ternary bases
38 Frobenius numbers
38 Lah numbers
38 Metronome
38 Minesweeper game
38 Solve the no connection puzzle
38 Terminal control/Unicode output
37 Bitmap/Bézier curves/Cubic
37 Extra primes
37 MD4
37 Multiline shebang
37 Mutex
37 Numbers divisible by their individual digits, but not by the product of their digits.
37 Object serialization O O
37 Pinstripe/Display
37 Pythagoras tree
37 RSA code
37 Square-free integers
37 Yellowstone sequence
36 Apply a digital filter (direct form II transposed)
36 Arithmetic-geometric mean/Calculate Pi
36 Cheryl's birthday
36 Church numerals
36 Conjugate transpose
36 Determine if two triangles overlap
36 Egyptian fractions
36 Gauss-Jordan matrix inversion
36 Multi-dimensional array
36 Nice primes
36 Numerical integration/Gauss-Legendre Quadrature
36 Ordered partitions
36 Pentagram
36 Product of divisors
36 RIPEMD-160
36 Smallest square that begins with n
36 Special Divisors
36 Strong and weak primes
36 Subset sum problem
35 Bacon cipher
35 Chaocipher
35 Circular primes
35 Dice game probabilities
35 Diversity prediction theorem
35 Entropy/Narcissist
35 Find words which contains more than 3 e vowels
35 Find words with alternating vowels and consonants
35 Length of an arc between two angles
35 Longest common suffix
35 Numbers which binary and ternary digit sum are prime
35 Old Russian measure of length
35 Parametrized SQL statement
35 Partition an integer x into n primes
35 Primes whose sum of digits is 25
35 Sorting algorithms/Patience sort
35 Textonyms
35 Triplet of three numbers
35 Zumkeller numbers
34 Bitmap/Histogram
34 Check input device is a terminal
34 Continued fraction/Arithmetic/Construct from rational number
34 Create an object at a given address O
34 Decimal floating point number to binary
34 Eban numbers
34 First power of 2 that has leading decimal digits of 12
34 Galton box animation
34 Halt and catch fire
34 Koch curve
34 Mersenne primes
34 Modular arithmetic
34 Multiplicative order
34 Negative base numbers
34 Pattern matching O O
34 Poker hand analyser
34 Reflection/List properties O
34 Set puzzle
34 Solve a Hidato puzzle
34 Straddling checkerboard
34 Strange numbers
34 Topic variable O
34 Type detection
34 Use another language to call a function
33 Bitcoin/address validation
33 Bitmap/Bézier curves/Quadratic
33 Burrows–Wheeler transform
33 Change e letters to i in words
33 Executable library
33 Faulhaber's triangle
33 Implicit type conversion
33 Long literals, with continuations
33 Mian-Chowla sequence
33 Parse command-line arguments
33 Pell's equation
33 Resistor mesh
33 Sequence: smallest number greater than previous term with exactly n divisors
33 Set of real numbers
33 Sorting algorithms/Cycle sort
33 Strange plus numbers
33 Terminal control/Cursor movement
33 Terminal control/Preserve screen
33 URL parser
33 Unique characters
33 Unprimeable numbers
33 Write to Windows event log
33 Xiaolin Wu's line algorithm
33 Zhang-Suen thinning algorithm
32 Chat server
32 Compiler/lexical analyzer
32 Death Star
32 Decision tables
32 Draw a rotating cube
32 Execute SNUSP
32 FTP
32 Faulhaber's formula
32 Find first and last set bit of a long integer
32 Jacobi symbol
32 Keyboard macros
32 Law of cosines - triples
32 Minimum number of cells after, before, above and below NxN squares
32 Minimum positive multiple in base 10 using only 0 and 1
32 Numbers with equal rises and falls
32 Numeric error propagation
32 Parallel brute force
32 Pragmatic directives
32 Rosetta Code/Find unimplemented tasks
32 Sexy primes
32 Simple database
32 Smarandache prime-digital sequence
32 Successive prime differences
32 Super-d numbers
32 Word break problem
31 Alternade words
31 Angles (geometric), normalization and conversion
31 Arena storage pool
31 Bin given limits
31 Check Machin-like formulas
31 Checkpoint synchronization
31 Chemical calculator
31 Count how many vowels and consonants occur in a string
31 Digit fifth powers
31 Esthetic numbers
31 Fairshare between two and more
31 Find prime numbers of the form n*n*n+2
31 First class environments
31 HTTPS/Authenticated
31 Memory layout of a data structure
31 Numbers with prime digits whose sum is 13
31 Pierpont primes
31 Polyspiral
31 Range consolidation
31 Rosetta Code/Fix code tags
31 Shift list elements to left by 3
31 State name puzzle
31 Stirling numbers of the first kind
31 Stirling numbers of the second kind
31 Strange unique prime triplets
31 Stream merge
31 Sum of elements below main diagonal of matrix
31 Superellipse
31 Update a configuration file
31 Verify distribution uniformity/Chi-squared test
31 Weird numbers
31 Window creation/X11
31 Word wheel
30 AVL tree
30 Chebyshev coefficients
30 Deconvolution/1D
30 Fermat numbers
30 Find words which contains all the vowels
30 Find words whose first and last three letters are equal
30 Generate random chess position
30 Kronecker product based fractals
30 Machine code
30 Magnanimous numbers
30 Mayan numerals
30 Nonoblock
30 Peano curve
30 Perlin noise
30 Primes with digits in nondecreasing order
30 Sum and product puzzle
30 Twin primes
29 Active Directory/Connect
29 Calkin-Wilf sequence
29 Common sorted list
29 Finite state machine
29 First perfect square in base n with n unique digits
29 Formal power series
29 Fraction reduction
29 Honeycombs
29 Increasing gaps between consecutive Niven numbers
29 Möbius function
29 Natural sorting
29 Partition function P
29 Plasma effect
29 Ramsey's theorem
29 Reflection/List methods O
29 Sierpinski pentagon
29 Summarize primes
29 Superpermutation minimisation
29 Table creation
29 Teacup rim text
29 Thiele's interpolation formula
29 World Cup group stage
28 A* search algorithm
28 Birthday problem
28 Cipolla's algorithm
28 Cut a rectangle
28 Distinct power numbers
28 Find largest left truncatable prime in a given base
28 Fixed length records
28 Go Fish
28 Hunt the Wumpus
28 Image convolution
28 Monads/Maybe monad
28 N-smooth numbers
28 Nautical bell
28 Palindromic gapful numbers
28 Same fringe
28 Shortest common supersequence
28 Show the (decimal) value of a number of 1s appended with a 3, then squared
28 Solve a Holy Knight's tour
28 Sorting algorithms/Cocktail sort with shifting bounds
28 Sylvester's sequence
28 The ISAAC Cipher
28 Tonelli-Shanks algorithm
28 Welch's t-test
28 Wieferich primes
27 Abelian sandpile model
27 Card shuffles
27 Color wheel
27 Common list elements
27 Distributed programming
27 Find if a point is within a triangle
27 Find prime n such that reversed n is also prime
27 Function frequency
27 Idiomatically determine all the characters that can be used for symbols
27 Intersecting number wheels
27 Merge and aggregate datasets
27 Next highest int from digits
27 Paraffins
27 Ramer-Douglas-Peucker line simplification
27 Safe addition
27 Sequence of primorial primes
27 Simulate input/Keyboard
27 Video display modes O
27 Yahoo! search interface
26 Audio alarm
26 Base58Check encoding
26 Bioinformatics/Sequence mutation
26 Changeable words
26 De Bruijn sequences
26 Elliptic curve arithmetic
26 Find minimum number of coins that make a given value
26 Hough transform
26 K-means++ clustering
26 Kolakoski sequence
26 Linux CPU utilization
26 Lucky and even lucky numbers
26 Magic squares of singly even order
26 Make a backup file
26 Parse an IP Address
26 Pseudo-random numbers/PCG32
26 RCRPG
26 Random Latin squares
26 Snake and Ladder
26 UPC
26 Words from neighbour ones
25 Almkvist-Giullera formula for pi
25 Cistercian numerals
25 Coprime triplets
25 Deming's Funnel
25 Elementary cellular automaton/Random Number Generator
25 Find first missing positive
25 List rooted trees
25 Markov chain text generator
25 Matrix chain multiplication
25 Maximum difference between adjacent elements of list
25 Mind boggling card trick
25 Neighbour primes
25 Odd words
25 Play recorded sounds
25 Playfair cipher
25 Pseudo-random numbers/Xorshift star
25 Self numbers
25 Total circles area
24 ASCII art diagram converter
24 Active Directory/Search for a user
24 Addition chains
24 Assertions in design by contract
24 Commatizing numbers
24 Consecutive primes with ascending or descending differences
24 Doomsday rule
24 File size distribution
24 Mastermind
24 Motzkin numbers
24 Numbers in base 10 that are palindromic in bases 2, 4, and 16
24 Numbers with same digit set in base 10 and base 16
24 Numeric separator syntax
24 Order by pair comparisons
24 Padovan sequence
24 Percolation/Mean run density
24 Permutations/Rank of a permutation
24 Piprimes
24 Record sound
24 Reverse the gender of a string
24 SOAP
24 Sokoban
24 Solve a Hopido puzzle
24 Solve a Numbrix puzzle
24 Untrusted environment
23 15 puzzle solver
23 Abelian sandpile model/Identity
23 Bilinear interpolation
23 Create an object/Native demonstration O
23 Erdős-primes
23 Exponentiation with infix operators in (or operating on) the base
23 Find duplicate files
23 Index finite lists of positive integers
23 Joystick position
23 Largest five adjacent number
23 Levenshtein distance/Alignment
23 Main step of GOST 28147-89
23 Monads/List monad
23 Nested templated data
23 Numbers in base-16 representation that cannot be written with decimal digits
23 Orbital elements
23 Pig the dice game/Player
23 Polynomial synthetic division
23 Rare numbers
23 Reflection/Get source O
23 Sierpinski arrowhead curve
23 Sort the letters of string in alphabetical order
23 Special neighbor primes
23 Spelling of ordinal numbers
23 Sum of primes in odd positions is prime
23 Ulam numbers
23 Unique characters in each string
22 Bitcoin/public point to address
22 Data Encryption Standard
22 EKG sequence convergence
22 Eertree
22 Elementary cellular automaton/Infinite length
22 Find words which contain the most consonants
22 Generate random numbers without repeating a value
22 Kosaraju
22 Line circle intersection
22 Median filter
22 Montgomery reduction
22 N-body problem
22 Native shebang
22 Odd squarefree semiprimes
22 Palindromic primes
22 Perceptron
22 Pseudo-random numbers/Combined recursive generator MRG32k3a
22 Sequence: nth number with exactly n divisors
22 Sleeping Beauty problem
22 Smallest power of 6 whose decimal expansion contains n
22 Solve triangle solitare puzzle
22 Sunflower fractal
22 Vigenère cipher/Cryptanalysis
22 Vogel's approximation method
21 10001th prime
21 Arithmetic coding/As a generalized change of radix
21 Concatenate two primes is also prime
21 Harmonic series
21 Just in time processing on a character stream
21 K-d tree
21 Knuth's power tree
21 Latin Squares in reduced form
21 Minimum numbers of three lists
21 Names to numbers
21 Next special primes
21 Palindromic primes in base 16
21 Pancake numbers
21 Positive decimal integers with the digit 1 occurring exactly twice
21 Prime numbers which contain 123
21 Prime words
21 Print debugging statement
21 Readline interface
21 Reverse the order of lines in a text file while preserving the contents of each line
21 Simulate input/Mouse
21 Sum data type
21 Window management
21 Zeckendorf arithmetic
20 Canonicalize CIDR
20 Color quantization
20 Compiler/code generator
20 Longest substrings without repeating characters
20 Metallic ratios
20 Monads/Writer monad
20 Most frequent k chars distance
20 Nonogram solver
20 P-value correction
20 Padovan n-step number sequences
20 Prime triplets
20 Primes - allocate descendants to their ancestors
20 Primes whose first and last number is 3
20 Pseudo-random numbers/Splitmix64
20 Selective file copy
20 Separate the house number from the street name
20 Special factorials
20 The sieve of Sundaram
20 Transportation problem
20 Wilson primes of order n
20 Word search
19 Air mass
19 Biorhythms
19 Code segment unload
19 Compare length of two strings
19 Compiler/virtual machine interpreter
19 Cubic Special Primes
19 Draw pixel 2
19 Find URI in text
19 Find square difference
19 Getting the number of decimals
19 HTTPS/Client-authenticated O
19 Imaginary base numbers
19 Matrix digital rain
19 Nimber arithmetic
19 Peaceful chess queen armies
19 Percolation/Mean cluster density
19 Percolation/Site percolation
19 Permuted multiples
19 Practical numbers
19 Primes which contain only one odd digit
19 Print itself
19 SQL-based authentication
19 Snake
19 Substring primes
19 Summation of primes
19 Terminal control/Positional read
18 Banker's algorithm
18 Bitmap/Read an image through a pipe
18 Compare sorting algorithms' performance
18 Cyclops numbers
18 Cyclotomic polynomial
18 Free polyominoes enumeration
18 Logistic curve fitting in epidemiology
18 Minimum primes
18 NYSIIS
18 Numbers whose count of divisors is prime
18 Own digits power sum
18 Particle swarm optimization
18 Permutations with some identical elements
18 Proof O O
18 Self-hosting compiler O
18 Square root by hand
18 Suffix tree
18 Tarjan
18 Two bullet roulette
18 Vibrating rectangles
18 Word ladder
17 Aspect oriented programming
17 Bioinformatics/Subsequence
17 Bitmap/PPM conversion through a pipe
17 Chernick's Carmichael numbers
17 Compiler/syntax analyzer
17 Geometric algebra
17 Jaro-Winkler distance
17 Juggler sequence
17 Largest difference between adjacent primes
17 Last list item
17 Percolation/Bond percolation
17 Quadrat Special Primes
17 Ramanujan's constant
17 Rendezvous
17 Retrieve and search chat history
17 Safe mode
17 Sierpinski curve
17 Singly-linked list/Element removal
17 Smallest multiple
17 Smallest numbers
17 Special pythagorean triplet
17 XML validation
16 Append numbers at same position in strings
16 Compiler/AST interpreter
16 Find adjacents primes which difference is square integer
16 Four is the number of letters in the ...
16 Largest prime factor
16 Legendre prime counting function
16 Longest palindromic substrings
16 Modified random distribution
16 Numerical integration/Adaptive Simpson's method
16 Prime numbers p which sum of prime numbers less or equal to p is prime
16 Sierpinski square curve
16 Sine wave
16 Topological sort/Extracted top item
16 Useless instructions
15 Continued fraction/Arithmetic/G(matrix ng, continued fraction n)
15 Distribution of 0 Digits in factorial series
15 Factorial base numbers indexing permutations of a collection
15 Fortunate numbers
15 Functional coverage tree
15 Gradient descent
15 Interactive help
15 Minimal steps down to 1
15 Multi-base primes
15 Non-transitive dice
15 Odd and square numbers
15 OpenWebNet password
15 SHA-256 Merkle tree
15 Untouchable numbers
14 Canny edge detector
14 Deconvolution/2D+
14 Generalised floating point addition
14 Geohash
14 Largest palindrome product
14 Minkowski question-mark function
14 Pandigital prime
14 Pisano period
14 Rodrigues’ rotation formula
14 Run as a daemon or service
14 Sorting algorithms/Tree sort on a linked list
14 Text completion
14 Tree from nesting levels
14 Unit testing
14 XXXX redacted
13 Audio frequency generator
13 Checksumcolor
13 Curve that touches three points
13 Display an outline as a nested table
13 Execute CopyPasta Language
13 Graph colouring
13 Greed
13 Largest product in a grid
13 Launch rocket with countdown and acceleration in stdout
13 One-time pad
13 Penrose tiling
13 Pentomino tiling
13 Pseudorandom number generator image
13 Railway circuit
13 Simulated annealing
13 Three word location
13 Using a speech engine to highlight words
13 VList
12 Catmull–Clark subdivision surface
12 Combinations with repetitions/Square digit chain
12 Distinct Palindromes within decimal numbers
12 External sort
12 Faces from a mesh
12 French Republican calendar
12 Hourglass puzzle
12 Long stairs
12 Quoting constructs
12 Spoof game
12 Suffixation of decimal numbers
12 Tetris
12 Time-based one-time password algorithm
11 Bioinformatics/Global alignment
11 Brace expansion using ranges
11 Colour pinstripe/Printer
11 Conjugate a Latin verb
11 Count the coins/0-1
11 Determine sentence type
11 Fibonacci matrix-exponentiation
11 Home primes
11 Morpion solitaire
11 Numerical and alphabetical suffixes
11 Pinstripe/Printer
11 Polynomial derivative
11 Powerful numbers
11 Range modifications
11 Resistance calculator
11 Rosetta Code/Rank languages by number of users
11 Square form factorization
11 Starting a web browser
11 Tree datastructures
11 Tropical algebra overloading
11 War card game
11 What weekdays will Christmas and New Year
10 16 puzzle game
10 Discrete Fourier transform
10 Earliest difference between prime gaps
10 Elliptic Curve Digital Signature Algorithm
10 Euclid-Mullin sequence
10 Find Chess960 starting position identifier
10 IPC via named pipe
10 Magic constant
10 Mayan calendar
10 OpenGL/Utah Teapot
10 Overloaded operators
10 Parse EBNF
10 Ramanujan primes
10 Resistance network calculator
10 Rosetta Code/Tasks without examples
10 Sort an outline at every level
10 Text to HTML
10 Verhoeff algorithm
9 ADFGVX cipher
9 Compiler/Verifying syntax
9 Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)
9 Doubly-linked list/Element removal
9 Fibonacci heap
9 Hex words
9 Integer long division
9 Jaccard index
9 Multidimensional Newton-Raphson method
9 Terminal control/Restricted width positional input/No wrapping
9 Terminal control/Restricted width positional input/With wrapping
9 User defined pipe and redirection operators
8 Addition-chain exponentiation
8 Camel case and snake case
8 Euler's constant 0.5772...
8 OpenGL pixel shader
8 Price list behind API
8 Ramanujan primes/twins
8 Random sentence from book
8 Raster bars
8 Robots
8 Rosetta Code/Run examples
8 Round-robin tournament schedule
8 Simple turtle graphics
8 Smallest enclosing circle problem
8 Tamagotchi emulator
8 URL shortener
8 Wordiff
7 Audio overlap loop
7 Black Box
7 Boids
7 Chess player
7 Dating agency
7 Hexapawn
7 Horse racing
7 I'm a software engineer, get me out of here
7 Latin Squares in reduced form/Randomizing using Jacobson and Matthews’ Technique
7 P-Adic numbers, basic
7 Process SMIL directives in XML data
7 Recursive descent parser generator
7 Remote agent/Agent logic
7 Remote agent/Simulation
7 Solve equations with substitution method
7 Strassen's algorithm
7 Waveform analysis/Doh ray me
6 B-spline
6 Compiler/Simple file inclusion pre processor
6 Create your own text control codes
6 Numbers which are not the sum of distinct squares
6 Particle fountain
6 Peripheral drift illusion
6 Remote agent/Agent interface
6 Segmentation fault protection
6 Solve a Rubik's Cube
5 Dominoes
5 Generalised floating point multiplication
5 Number triplets game
5 OLE automation
5 P-Adic square roots
5 Solving coin problems
5 Unicode polynomial equation
5 Waveform analysis/Top and tail
5 Weather routing
5 WiktionaryDumps to words
4 15 puzzle game in 3D
4 Blackjack strategy
4 Erdős–Woods numbers
4 Multiton
4 Rosetta Code/List authors of task descriptions
4 Ukkonen’s suffix tree construction
4 Using the Meetup.com API
4 Vidir
3 CLI-based maze-game
3 Elevator simulation
3 Uno (Card Game)
2 IRC gateway
1 Mine a bitcoin