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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 top 10 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. Ideally it would be nice to be able to generate the table for any language but it is fairly intensive to generate. Once a week is ok, on demand would be unsustainable.

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

Top ten programming languages by number of task examples completed:
① Go
② Phix
③ Julia
④ Raku
⑤ Perl
⑥ Python
⑦ Kotlin
⑧ C
⑨ Racket
⑩ Java
As of 2020-09-27T22:16:22Z :: Tasks: 1068 :: Draft Tasks:207 :: Total Tasks: 1275 :: Total Examples: 70177
Count Task
470 Hello world/Text
314 99 Bottles of Beer
310 100 doors
304 FizzBuzz
281 Factorial
280 Fibonacci sequence
269 Comments
258 A+B
252 Empty program
235 Function definition
224 Loops/Infinite
221 Reverse a string
218 Arrays
218 Loops/While
213 Ackermann function
203 Loops/For
198 Conditional structures
195 Arithmetic/Integer
195 Greatest element of a list
185 Array concatenation
185 Greatest common divisor
184 Averages/Arithmetic mean
183 Integer comparison
183 Repeat a string
182 Increment a numerical string
181 Boolean values
181 Even or odd
179 Loops/Downward for
175 Hello world/Graphical
171 Copy a string
164 Character codes
163 String concatenation
162 Apply a callback to an array
161 Loops/Do-while
160 Hello world/Newline omission
160 Loops/For with a specified step
160 Loops/Foreach
160 Sieve of Eratosthenes
160 Sum and product of an array
159 Array length
159 Binary digits
158 Loops/Break
157 String length
156 Loops/N plus one half
155 Integer sequence
155 String case
155 Sum of a series
154 Palindrome detection
153 Towers of Hanoi
152 Generic swap
152 Leap year
152 Logical operations
152 Tokenize a string
151 Hailstone sequence
151 Rot-13
150 Dot product
150 Empty string
150 Sum of squares
148 Filter
147 Associative array/Creation
145 Sort an integer array
145 Sorting algorithms/Bubble sort
144 Execute a system command
144 Factors of an integer
142 Guess the number
142 Quine
141 Caesar cipher
140 Higher-order functions
140 User input/Text
139 Determine if a string is numeric
138 File input/output
138 Remove duplicate elements
136 Hello world/Standard error
136 Roman numerals/Encode
136 System time
134 Command-line arguments
134 Day of the week
133 Bitwise operations
133 Primality by trial division
133 Read entire file
133 Sorting algorithms/Quicksort
132 Create a file
131 Sleep
131 Substring
130 Loop over multiple arrays simultaneously
130 Luhn test of credit card numbers
129 Stack
128 Check that file exists
128 Loops/Continue
127 Literals/String
127 Mutual recursion
126 Happy numbers
126 Pascal's triangle
125 Date format
125 Generate lower case ASCII alphabet
124 Least common multiple
124 Zero to the zero power
123 Binary search
122 Flatten a list
122 Variables
121 Include a file  
121 Literals/Integer
120 Balanced brackets
120 Detect division by zero
119 Compound data type
119 Knuth shuffle
119 Loops/Nested
119 Program termination
118 Associative array/Iteration
118 Formatted numeric output
118 Function composition
117 ABC Problem
117 Null object
116 Averages/Root mean square
116 Ethiopian multiplication
116 File size
116 Hash from two arrays
116 Read a file line by line
115 Mandelbrot set
115 N-queens problem
115 Sorting algorithms/Insertion sort
114 Classes
114 Delete a file
114 Search a list
113 Count in octal
113 Count occurrences of a substring
113 Guess the number/With feedback
112 Averages/Median
112 Case-sensitivity of identifiers
112 Input loop
112 Multiplication tables
112 Real constants and functions
112 Roman numerals/Decode
111 Hostname  
111 Matrix multiplication
111 Matrix transposition
110 Anagrams
110 Environment variables
110 Identity matrix
110 Perfect numbers
110 Random numbers
110 Rename a file
109 Babbage problem
109 HTTP
109 Haversine formula
109 Pick random element
108 Arithmetic/Complex
108 Find limit of recursion
108 Return multiple values
108 String matching
107 Accumulator factory
107 Align columns
106 Conway's Game of Life
106 Letter frequency
106 Pangram checker
105 Assertions
105 Horner's rule for polynomial evaluation
104 Averages/Pythagorean means
104 Catalan numbers
104 Infinity
104 Program name
104 Temperature conversion
104 Variadic function
103 Arithmetic-geometric mean
103 Evaluate binomial coefficients
103 Levenshtein distance
103 Permutations
103 Strip a set of characters from a string
102 Regular expressions
102 Run-length encoding
101 Exceptions
101 String append
101 Substring/Top and tail
101 Zig-zag matrix
100 Anonymous recursion
100 Combinations
100 Nth root
100 Queue/Definition
100 String interpolation (included)
100 Trigonometric functions
99 Reverse words in a string
99 Sorting algorithms/Merge sort
99 Strip whitespace from a string/Top and tail
98 Short-circuit evaluation
97 Comma quibbling
97 Look-and-say sequence
97 Prime decomposition
97 Sorting algorithms/Selection sort
96 Bulls and cows
96 Ordered words
96 Shell one-liner
95 24 game
95 Create a two-dimensional array at runtime
95 Interactive programming  
95 Sierpinski triangle
94 Call a function
94 Collections
94 Enumerations
94 Y combinator
93 Middle three digits
93 Range extraction
93 String prepend
93 Vector products
92 Arbitrary-precision integers (included)
92 Evolutionary algorithm
92 Exponentiation operator
92 First-class functions
92 Sorting algorithms/Gnome sort
92 Sum multiples of 3 and 5
92 Time a function
91 Power set
91 Range expansion
91 Sorting algorithms/Cocktail sort
90 Create an HTML table
90 Execute Brain****
90 Inheritance/Single
90 MD5
90 Random number generator (included)
90 Sierpinski carpet
90 Sum digits of an integer
90 Walk a directory/Non-recursively
89 Averages/Simple moving average
89 Cumulative standard deviation
89 One-dimensional cellular automata
89 Sequence of non-squares
88 Averages/Mode
88 Digital root
87 JSON
87 Langton's ant
87 N'th
87 Sort using a custom comparator
86 Entropy
86 Five weekends
86 String comparison
85 Forward difference
85 Hamming numbers
85 Harshad or Niven series
85 Monty Hall problem
85 Sorting algorithms/Bogosort
84 Abundant, deficient and perfect number classifications
84 CSV data manipulation
84 Dragon curve
84 Greatest subsequential sum
84 Josephus problem
84 Price fraction
84 Symmetric difference
84 The Twelve Days of Christmas
84 Window creation
83 Abstract type
83 Sort an array of composite structures
83 Tree traversal
82 CSV to HTML translation
82 Closures/Value capture
82 File modification time
82 Gray code
82 Last Friday of each month
82 Menu
82 Number names  
81 Map range
81 Simple windowed application
81 Sorting algorithms/Heapsort
80 Amicable pairs
80 Box the compass
80 Hello world/Newbie
80 Queue/Usage
79 Catamorphism
79 Hello world/Line printer
79 Introspection
79 Literals/Floating point
79 Non-decimal radices/Convert
79 Read a specific line from a file
79 SEDOLs
78 Floyd's triangle
78 Monte Carlo methods
78 Number reversal game
78 Singly-linked list/Traversal
78 Terminal control/Clear the screen
78 Walk a directory/Recursively
78 Web scraping
77 Calculating the value of e
77 Count in factors
77 Count the coins
77 Roots of unity
77 Set
77 Sockets
77 Sorting algorithms/Shell sort
77 Spiral matrix
77 Terminal control/Ringing the terminal bell
77 URL decoding
77 XML/Input
76 Bitmap
76 Call an object method
76 Compare a list of strings
76 Playing cards
75 Address of a variable  
75 CRC-32
75 Concurrent computing
75 Date manipulation
75 Find common directory path
75 Hofstadter Q sequence
75 Knapsack problem/0-1
75 Order two numerical lists
75 Pythagorean triples
75 Show the epoch
75 Sorting algorithms/Counting sort
75 Top rank per group
74 Averages/Mean angle
74 Dynamic variable names    
74 Fibonacci n-step number sequences
74 Find the last Sunday of each month
74 Keyboard input/Obtain a Y or N response  
74 Linear congruential generator
74 Lucas-Lehmer test
74 Multifactorial
74 Proper divisors
74 URL encoding
74 Word wrap
73 Almost prime
73 Hello world/Web server
73 Here document  
73 Long multiplication
73 Man or boy test
73 Non-decimal radices/Output
73 Sorting algorithms/Comb sort
73 Soundex
73 Strip comments from a string
72 Kaprekar numbers
72 List comprehensions
72 Operator precedence
72 Semordnilap
72 Unicode variable names
71 Empty directory
71 Equilibrium index
71 Exceptions/Catch an exception thrown in a nested call
71 Find the missing permutation
71 Gamma function
71 Jensen's Device
71 Modular inverse
71 SHA-1
71 SHA-256
71 Singly-linked list/Element definition
71 Special characters
71 Take notes on the command line
70 Animation
70 Calendar
70 Multiple distinct objects
70 Parsing/RPN calculator algorithm
70 Phrase reversals
70 Pi
70 Read a configuration file
70 Repeat
70 Split a character string based on change of character
69 Bitmap/Bresenham's line algorithm  
69 Draw a sphere
69 Execute HQ9+
69 Flow-control structures
69 Four bit adder
69 IBAN
69 Polymorphism
69 Quaternion type
69 Rock-paper-scissors
69 Sudoku
69 Write entire file
68 AKS test for primes
68 Anagrams/Deranged anagrams
68 Convert seconds to compound duration
68 Guess the number/With feedback (player)
68 Self-describing numbers
68 Sort disjoint sublist
68 Stair-climbing puzzle
68 Trabb Pardo–Knuth algorithm
68 Vigenère cipher
67 15 Puzzle Game  
67 Call a foreign-language function
67 Currying
67 Enforced immutability
67 Fork
67 Horizontal sundial calculations
67 Longest common subsequence
67 Sorting algorithms/Stooge sort
67 Write float arrays to a text file
67 Zeckendorf number representation
66 Catalan numbers/Pascal's triangle
66 Combinations with repetitions
66 Constrained random points on a circle
66 Euler's sum of powers conjecture
66 Fractal tree
66 Maze generation
66 Munchausen numbers
66 Numerical integration
65 Arithmetic/Rational
65 Benford's law
65 Closest-pair problem
65 Largest int from concatenated ints
65 Magic squares of odd order
65 Named parameters
65 Optional parameters
65 Sort stability
65 Variable size/Get  
64 Euler method
64 Extend your language  
64 Hofstadter-Conway $10,000 sequence
64 Inheritance/Multiple
64 Morse code
64 Population count
64 Runtime evaluation    
64 Text processing/Max licenses in use
63 Amb  
63 Continued fraction
63 Documentation
63 Jump anywhere
63 Roots of a function
63 Show Ascii table
63 Special variables
63 Undefined values
63 Unix/ls
63 Van der Corput sequence
63 XML/Output
62 Fast Fourier transform
62 Memory allocation
62 Narcissistic decimal number
62 Nested function
62 One of n lines in a file
62 Priority queue
62 Remove lines from a file
62 Singly-linked list/Element insertion
62 Sorting algorithms/Pancake sort
62 Strip control codes and extended characters from a string
62 Write language name in 3D ASCII
61 Chinese remainder theorem
61 Cholesky decomposition
61 General FizzBuzz
61 HTTPS
61 Pernicious numbers
60 Arithmetic evaluation
60 Barnsley fern
60 Binary strings
60 Factors of a Mersenne number
60 Modular exponentiation
60 Probabilistic choice
60 Rep-string
60 Roots of a quadratic function
60 Sequence of primes by trial division
60 Sorting algorithms/Sleep sort
60 Test a function
59 Averages/Mean time of day
59 Circles of given radius through two points
59 Dinesman's multiple-dwelling problem
59 Draw a clock
59 Exponentiation order
59 Globally replace text in several files
59 Host introspection
59 Non-decimal radices/Input
59 Old lady swallowed a fly
59 Runge-Kutta method
59 User input/Graphical
58 Animate a pendulum
58 Get system command output
58 Mouse position
58 Partial function application
58 Plot coordinate pairs
58 Reduced row echelon form
58 Thue-Morse
58 Tic-tac-toe
58 Unicode strings
57 24 game/Solve
57 Angle difference between two bearings
57 Generator/Exponential
57 Huffman coding
57 LZW compression
57 Left factorials
57 Miller–Rabin primality test
57 Semiprime
57 Sorting algorithms/Bead sort
56 9 billion names of God the integer
56 Add a variable to a class instance at runtime      
56 Anti-primes
56 Best shuffle
56 Brownian tree
56 Compile-time calculation    
56 Dutch national flag problem
56 Emirp primes
56 Fibonacci word
56 Hash join  
56 JortSort
56 Knapsack problem/Unbounded
56 Knight's tour
56 Sort three variables
56 Sorting algorithms/Permutation sort
56 Stem-and-leaf plot
56 Truncatable primes  
56 Two Sum
56 XML/XPath  
55 4-rings or 4-squares puzzle
55 Bitmap/Write a PPM file  
55 Deal cards for FreeCell
55 Define a primitive data type  
55 Department Numbers
55 Extreme floating point values
55 Forest fire  
55 I before E except after C
55 Knapsack problem/Continuous
55 Odd word problem
55 Singleton
55 Terminal control/Display an extended character
55 Word frequency
54 Delegates
54 Doubly-linked list/Element definition
54 Integer overflow
54 Multisplit
54 Random number generator (device)
54 Runtime evaluation/In an environment    
54 Scope modifiers
54 Sierpinski triangle/Graphical
54 Stack traces
54 Yin and yang
53 Draw a cuboid
53 Extract file extension
53 Grayscale image
53 Leonardo numbers
53 Matrix-exponentiation operator  
53 Munching squares
53 Pointers and references  
53 Rosetta Code/Rank languages by popularity  
53 Send email
53 Synchronous concurrency
53 Terminal control/Cursor positioning    
53 Topological sort
53 XML/DOM serialization
52 CUSIP
52 Handle a signal
52 Inverted syntax
52 Iterated digits squaring
52 Maximum triangle path sum
52 Truncate a file
51 2048  
51 Base64 encode data
51 Bernoulli numbers
51 Mad Libs  
51 Modulinos  
51 Statistics/Basic
51 Subleq
51 Ternary logic
51 Text processing/2
50 Cartesian product of two or more lists
50 Chinese zodiac
50 Convert decimal number to rational
50 Dining philosophers
50 Discordian date
50 First-class functions/Use numbers analogously    
50 Heronian triangles
50 Keyboard input/Keypress check
50 Ludic numbers
50 Non-continuous subsequences
50 Quickselect algorithm
50 Respond to an unknown method call    
50 Terminal control/Coloured text  
50 Unbias a random generator
50 Wireworld  
49 Draw a pixel
49 Fractran
49 Longest common prefix
49 Seven-sided dice from five-sided dice
49 Universal Turing machine
49 Validate International Securities Identification Number
48 Archimedean spiral
48 Attractive numbers
48 Call a function in a shared library
48 Damm algorithm
48 FASTA format
48 Farey sequence
48 Find the intersection of two lines
48 Longest increasing subsequence
48 Text processing/1
47 Colour bars/Display
47 DNS query      
47 Dijkstra's algorithm
47 Doubly-linked list/Element insertion
47 Doubly-linked list/Traversal  
47 Echo server  
47 Extensible prime generator
47 GUI component interaction  
47 Gaussian elimination
47 Loops/Increment loop index within loop body
47 Move-to-front algorithm
47 Polymorphic copy
47 Polynomial regression
47 Rate counter
47 Vector
47 Zebra puzzle
46 100 prisoners
46 Determine if only one instance is running
46 Egyptian division
46 Greyscale bars/Display
46 Holidays related to Easter
46 Jaro distance
46 Longest string challenge
46 Make directory path
46 Metaprogramming  
46 Search a list of records
46 Shoelace formula for polygonal area
46 Smith numbers
46 Stable marriage problem
46 Stern-Brocot sequence
46 Tokenize a string with escaping
45 Append a record to the end of a text file
45 Bitmap/Flood fill
45 History variables  
45 Hofstadter Figure-Figure sequences  
45 Image noise
45 Naming conventions  
45 Pascal matrix generation
45 Password generator
45 Send an unknown method call  
45 Strip block comments
44 Abundant odd numbers
44 Average loop length
44 Carmichael 3 strong pseudoprimes
44 Chaos game
44 Determinant and permanent
44 Execute a Markov algorithm
44 Last letter-first letter
44 Perfect shuffle
44 Pig the dice game
44 Rosetta Code/Count examples    
44 Set consolidation
43 Base64 decode data  
43 Bitmap/Read a PPM file  
43 Doubly-linked list/Definition  
43 Long year?    
43 OpenGL
43 Parsing/Shunting-yard algorithm
43 Polynomial long division
43 Sattolo cycle
43 Sort numbers lexicographically
43 Sparkline in unicode
43 Verify distribution uniformity/Naive
43 Visualize a tree
42 Active object
42 Determine if a string has all the same characters
42 Element-wise operations
42 Generate Chess960 starting position
42 Keyboard input/Flush the keyboard buffer  
42 Kronecker product
42 Longest Common Substring
42 Percentage difference between images
42 Sorting algorithms/Radix sort
42 Ulam spiral (for primes)
41 Atomic updates
41 Bulls and cows/Player
41 Cantor set
41 Digital root/Multiplicative digital root
41 Hickerson series of almost integers
41 Jewels and Stones
41 MD5/Implementation
41 McNuggets Problem
41 Narcissist
41 RPG Attributes Generator
41 Secure temporary file
41 Spinning rod animation/Text
41 Start from a main routine    
41 Sum to 100
41 Table creation/Postal addresses    
41 Twelve statements  
41 Variable size/Set  
40 Calendar - for "REAL" programmers    
40 Elementary cellular automaton
40 Fusc sequence
40 GUI/Maximum window dimensions
40 Kernighans large earthquake problem
40 Problem of Apollonius
40 Sorting algorithms/Strand sort
40 Speech synthesis  
40 Subtractive generator
40 Terminal control/Dimensions  
40 Text between
40 Van Eck sequence
40 Voronoi diagram
40 Water collected between towers
39 Aliquot sequence classifications
39 Color of a screen pixel
39 Combinations and permutations
39 Determine if a string has all unique characters  
39 GUI enabling/disabling of controls  
39 Hilbert curve
39 Knapsack problem/Bounded
39 Nim Game
39 Parametric polymorphism    
39 Pascal's triangle/Puzzle
39 Permutations/Derangements
39 S-Expressions
39 Topswops
39 UTF-8 encode and decode
38 Balanced ternary
38 Break OO privacy    
38 Casting out nines
38 Constrained genericity      
38 Copy stdin to stdout
38 Inverted index
38 Julia set
38 Parallel calculations
38 Sorting Algorithms/Circle Sort
38 Variable-length quantity
37 Associative array/Merging  
37 Brace expansion
37 Chowla numbers
37 Currency
37 Deepcopy
37 Flipping bits game
37 Knuth's algorithm S
37 LU decomposition
37 Magic squares of doubly even order  
37 Parsing/RPN to infix conversion
37 Permutations by swapping
37 Prime conspiracy
37 Pythagorean quadruples
37 QR decomposition  
37 Ray-casting algorithm
37 Sailors, coconuts and a monkey problem
37 Self-referential sequence
37 Sort a list of object identifiers
37 Statistics/Normal distribution
37 Taxicab numbers
37 Terminal control/Inverse video  
37 Vampire number
36 Bell numbers  
36 Bitmap/Midpoint circle algorithm      
36 Colour pinstripe/Display
36 Create a file on magnetic tape  
36 File extension is in extensions list
36 Find palindromic numbers in both binary and ternary bases
36 Fivenum
36 Function prototype    
36 Magic 8-Ball
36 Object serialization  
36 Permutation test
36 Primorial numbers
36 Terminal control/Hiding the cursor  
35 Abbreviations, automatic  
35 Cramer's rule
35 Determine if a string is collapsible  
35 Euler's identity
35 Events    
35 Floyd-Warshall algorithm
35 Input/Output for Lines of Text
35 Input/Output for Pairs of Numbers
35 Lychrel numbers  
35 MAC Vendor Lookup
35 MD4
35 Metered concurrency
35 Minesweeper game  
35 Multiline shebang    
35 Musical scale  
35 Numerical integration/Gauss-Legendre Quadrature
35 Order disjoint list items  
35 Permutations with repetitions
35 Pinstripe/Display
35 Scope/Function names and labels  
35 Square but not cube
35 Substitution Cipher
35 Terminal control/Unicode output  
34 Bitwise IO  
34 Cuban primes
34 Days between dates  
34 Feigenbaum constant calculation
34 Fibonacci word/fractal
34 Gapful numbers  
34 Maze solving
34 Pathological floating point problems
34 Penney's game
34 Read a file character by character/UTF8
34 Sutherland-Hodgman polygon clipping
34 Test integerness
33 Arithmetic-geometric mean/Calculate Pi
33 Bitmap/Bézier curves/Cubic    
33 Egyptian fractions
33 Entropy/Narcissist
33 Executable library  
33 Integer roots
33 Kahan summation
33 Largest number divisible by its digits  
33 Parametrized SQL statement
33 RIPEMD-160
33 Square-free integers
33 Totient function
32 Bitcoin/address validation
32 Check output device is a terminal  
32 Convex hull
32 Find the intersection of a line with a plane
32 Humble numbers
32 ISBN13 check digit  
32 Mutex  
32 Ordered Partitions  
32 Parse command-line arguments  
32 Pentagram
32 Pythagoras tree
32 Ranking methods
32 Rosetta Code/Find bare lang tags      
32 Solve the no connection puzzle  
32 The Name Game  
32 Truth table
32 URL parser  
31 Approximate Equality
31 Conjugate transpose  
31 Decimal floating point number to binary  
31 Display a linear combination
31 Execute SNUSP
31 Galton box animation
31 Long primes
31 Loops/Wrong ranges
31 Loops/with multiple ranges  
31 Multiple regression  
31 Negative base numbers
31 Numeric error propagation
31 Pattern matching      
31 RSA code
31 Recaman's sequence  
31 Resistor mesh
31 Set puzzle
31 Sorting algorithms/Patience sort
31 Straddling checkerboard
31 Subset sum problem
31 Terminal control/Cursor movement  
31 Topic variable    
31 Write to Windows event log
30 Abbreviations, easy
30 Abbreviations, simple
30 Bitmap/Bézier curves/Quadratic    
30 Bitmap/Histogram  
30 Brazilian numbers  
30 Continued fraction/Arithmetic/Construct from rational number
30 Determine if a string is squeezable  
30 First class environments  
30 Keyboard macros
30 Metronome
30 Multiplicative order
30 Partition an integer X into N primes
30 Poker hand analyser
30 Reflection/List properties    
30 Simple database
30 Solve a Hidato puzzle
30 Textonyms
29 21 Game  
29 Apply a digital filter (direct form II transposed)
29 Check Machin-like formulas  
29 Check input device is a terminal  
29 Cheryl's Birthday
29 Cycle detection
29 Factorions  
29 Faulhaber's triangle
29 Implicit type conversion
29 Multi-dimensional array
29 Palindrome dates    
29 Terminal control/Preserve screen
29 Use another language to call a function    
29 Window creation/X11
29 Zhang-Suen thinning algorithm
28 Bacon cipher
28 Chat server  
28 Checkpoint synchronization
28 Church Numerals    
28 Compiler/lexical analyzer  
28 Death Star  
28 Deconvolution/1D
28 Determine if two triangles overlap
28 Eban numbers  
28 FTP
28 Faulhaber's formula  
28 HTTPS/Authenticated  
28 Idiomatically determine all the lowercase and uppercase letters
28 Koch curve  
28 Memory layout of a data structure    
28 Mersenne primes  
28 Modular arithmetic
28 Parallel Brute Force
28 Perfect totient numbers
28 Rosetta Code/Find unimplemented tasks        
28 Safe primes and unsafe primes  
28 Sequence: smallest number greater than previous term with exactly n divisors  
28 Sequence: smallest number with exactly n divisors  
28 Set of real numbers
28 Xiaolin Wu's line algorithm
27 Active Directory/Connect  
27 Arena storage pool    
27 Chaocipher  
27 Find first and last set bit of a long integer
27 Formal power series
27 Four is magic
27 Honeycombs  
27 Jacobi symbol  
27 Paraffins
27 Pragmatic directives  
27 Rosetta Code/Fix code tags    
27 Sorting algorithms/Cycle sort
27 State name puzzle
27 Superellipse
27 Update a configuration file
27 Verify distribution uniformity/Chi-squared test
26 Chemical Calculator
26 Decision tables
26 Dice game probabilities
26 Distributed programming      
26 Find largest left truncatable prime in a given base
26 Go Fish  
26 Lah numbers  
26 Mian-Chowla sequence  
26 Natural sorting  
26 Nautical bell
26 Old Russian measure of length
26 Ramsey's theorem
26 Reflection/List methods    
26 Safe addition
26 Same Fringe  
26 Strong and weak primes  
26 Sum and Product Puzzle
26 Table creation      
26 Thiele's interpolation formula
25 AVL tree    
25 Birthday problem
25 Burrows–Wheeler transform  
25 Card shuffles
25 Chebyshev coefficients
25 Create an object at a given address      
25 Cut a rectangle
25 Diversity prediction theorem    
25 Fairshare between two and more  
25 Fraction reduction
25 Image convolution
25 Law of cosines - triples  
25 Polyspiral  
25 RCRPG  
25 Smarandache prime-digital sequence    
25 Super-d numbers  
25 The ISAAC Cipher
25 Weird numbers
25 Word break problem  
24 First power of 2 that has leading decimal digits of 12  
24 K-means++ clustering  
24 Kronecker product based fractals  
24 Plasma effect
24 Play recorded sounds          
24 Ramer-Douglas-Peucker line simplification
24 Range consolidation
24 Sequence of primorial primes
24 Sexy primes  
24 Sierpinski pentagon  
24 Simulate input/Keyboard    
24 Solve a Holy Knight's tour  
24 Type detection    
24 Welch's t-test
24 Yahoo! search interface      
24 Yellowstone sequence  
23 Color wheel  
23 Draw a rotating cube
23 Fermat numbers  
23 First perfect square in base N with N unique digits  
23 Generate random chess position  
23 Hough transform
23 Machine code    
23 Magic squares of singly even order  
23 Main step of GOST 28147-89  
23 Make a backup file  
23 Peano curve  
23 Pell's equation  
23 Perlin noise
23 Record sound    
23 SOAP    
23 Stirling numbers of the second kind  
23 Stream Merge  
23 Teacup rim text    
23 Zumkeller numbers  
22 A* search algorithm  
22 Angles (geometric), normalization and conversion  
22 AudioAlarm      
22 Base58Check encoding  
22 Cipolla's algorithm
22 Create an object/Native demonstration  
22 Deming's Funnel  
22 Function frequency    
22 Idiomatically determine all the characters that can be used for symbols  
22 Linux CPU utilization  
22 Markov chain text generator  
22 N-smooth numbers  
22 Nonoblock  
22 Percolation/Mean run density  
22 Permutations/Rank of a permutation
22 Reverse the gender of a string  
22 Spelling of ordinal numbers  
22 Stirling numbers of the first kind  
22 Successive prime differences    
22 Superpermutation minimisation
22 Tonelli-Shanks algorithm
22 Total circles area
22 Video display modes      
22 World Cup group stage  
21 Active Directory/Search for a user        
21 Bioinformatics/base count  
21 Circular primes  
21 Elementary cellular automaton/Random Number Generator  
21 Fixed length records        
21 Intersecting Number Wheels  
21 Joystick position          
21 Mind boggling card trick      
21 Monads/Maybe monad        
21 Palindromic gapful numbers      
21 Parse an IP Address
21 Pig the dice game/Player    
21 Playfair cipher    
21 Unprimeable numbers  
21 Window management  
20 Abelian sandpile model    
20 Addition chains
20 Commatizing numbers  
20 Data Encryption Standard  
20 De Bruijn sequences  
20 Elliptic curve arithmetic
20 Lucky and even lucky numbers    
20 Mastermind      
20 Median filter  
20 Minimum positive multiple in base 10 using only 0 and 1    
20 Native shebang    
20 Next highest int from digits  
20 Numeric separator syntax  
20 Orbital elements  
20 Random Latin Squares  
20 Remove vowels from a string      
20 Shortest common supersequence
20 Snake And Ladder
20 Sokoban
20 Solve a Hopido puzzle  
20 Solve a Numbrix puzzle    
19 Bilinear interpolation
19 Find duplicate files    
19 Finite state machine  
19 Hunt The Wumpus      
19 Kolakoski sequence  
19 Monads/List monad      
19 N-body problem  
19 Pierpont primes  
19 Primality by Wilson's theorem    
19 Readline interface
19 Reflection/Get source      
19 Simulate input/Mouse    
19 Sorting algorithms/Cocktail sort with shifting bounds      
19 Sunflower fractal    
18 Arithmetic coding/As a generalized change of radix    
18 Code segment unload  
18 Color quantization  
18 Eertree  
18 Find URI in text      
18 Gauss-Jordan matrix inversion    
18 K-d tree  
18 Length of an arc between two angles      
18 Magnanimous numbers      
18 Monads/Writer monad        
18 Names to numbers    
18 Perceptron      
18 Print debugging statement
18 SQL-based authentication
18 Selective File Copy    
18 Sum data type      
18 Untrusted environment      
18 Vigenère cipher/Cryptanalysis
17 Assertions in design by contract      
17 Bioinformatics/Sequence mutation  
17 Bitcoin/public point to address    
17 Compiler/code generator    
17 Draw pixel 2    
17 EKG sequence convergence  
17 Elementary cellular automaton/Infinite length    
17 Index finite lists of positive integers  
17 Just in time processing on a character stream
17 Knuth's power tree  
17 Kosaraju  
17 Levenshtein distance/Alignment  
17 List rooted trees  
17 Longest common suffix        
17 Mertens function      
17 Metallic ratios    
17 Montgomery reduction
17 Möbius function    
17 P-value correction  
17 Percolation/Site percolation  
17 Primes - allocate descendants to their ancestors
17 Separate the house number from the street name    
17 Solve triangle solitare puzzle  
17 Zeckendorf arithmetic  
16 Aspect Oriented Programming  
16 Compiler/syntax analyzer      
16 Compiler/virtual machine interpreter      
16 Esthetic numbers      
16 File size distribution  
16 HTTPS/Client-authenticated    
16 Imaginary base numbers  
16 Increasing gaps between consecutive Niven numbers      
16 Isqrt (integer square root) of X            
16 Most frequent k chars distance    
16 NYSIIS  
16 Particle Swarm Optimization  
16 Polynomial synthetic division  
16 Proof            
16 Self-hosting compiler          
16 Terminal control/Positional read  
16 Vogel's approximation method  
16 Word search  
15 15 puzzle solver          
15 Bitmap/Read an image through a pipe      
15 Free polyominoes enumeration      
15 Geometric algebra      
15 Line circle intersection    
15 Matrix Digital Rain    
15 Mayan numerals      
15 Nested templated data      
15 Nonogram solver    
15 Percolation/Bond percolation  
15 Percolation/Mean cluster density  
15 Rendezvous        
15 Retrieve and search chat history        
15 Sierpinski arrowhead curve        
15 Snake    
15 Suffix tree  
15 Transportation problem      
15 Word wheel      
14 Gradient descent        
14 Latin Squares in reduced form      
14 Matrix chain multiplication    
14 Numerical integration/Adaptive Simpson's method  
14 Peaceful chess queen armies  
14 Permutations with some identical elements          
14 Tarjan    
14 Twin Prime Conjecture        
14 Vibrating rectangles    
14 XML Validation    
13 Bitmap/PPM conversion through a pipe      
13 Compare sorting algorithms' performance        
13 Compiler/AST interpreter      
13 Cyclotomic Polynomial    
13 Four is the number of letters in the ...  
13 Functional coverage tree    
13 Generalised floating point addition    
13 Logistic Curve Fitting in Epidemiology    
13 Rare numbers          
13 Sequence: nth number with exactly n divisors    
13 Sine wave      
13 Singly-linked list/Element removal      
13 Topological sort/Extracted top item
13 UPC        
12 ASCII art diagram converter      
12 Banker's algorithm    
12 Canonicalize CIDR      
12 Chernick's Carmichael numbers      
12 Continued fraction/Arithmetic/G(matrix NG, Contined Fraction N)      
12 Deconvolution/2D+      
12 Jaro-Winkler Distance        
12 Nimber arithmetic        
12 OpenWebNet Password    
12 Pisano period      
12 Ramanujan's constant      
12 Safe mode            
11 Abelian sandpile model/Identity          
11 Canny edge detector          
11 Factorial base numbers indexing permutations of a collection        
11 Interactive Help        
11 Sierpinski curve        
11 Sierpinski square curve        
11 Simulated annealing        
11 Sorting algorithms/Tree sort on a linked list      
11 Tetris          
11 Text Completion        
11 VList        
10 Audio frequency generator            
10 Biorhythms          
10 Execute CopyPasta Language      
10 External sort        
10 Geohash        
10 Getting the number of decimals        
10 Greed        
10 Long literals, with continuations            
10 Penrose tiling    
10 Print itself            
10 Pseudo-random numbers/PCG32          
10 Pseudo-random numbers/Xorshift star          
10 Railway circuit      
10 Resistance Calculator        
10 Run as a daemon or service          
10 Spoof game      
10 Time-based One-time Password Algorithm          
10 Using a Speech engine to highlight words              
9 Catmull–Clark subdivision surface            
9 Colour pinstripe/Printer        
9 Combinations with repetitions/Square Digit Chain        
9 Curve that touches three points          
9 Faces from a mesh        
9 Fibonacci matrix-exponentiation        
9 French Republican calendar        
9 IPC via named pipe          
9 Launch rocket with countdown and acceleration in stdout        
9 Morpion solitaire        
9 One-time pad    
9 Parse EBNF            
9 Pentomino tiling        
9 Pinstripe/Printer          
9 Pseudo-random numbers/Splitmix64          
9 Starting a web browser        
9 Suffixation of decimal numbers        
9 Three word location        
9 Unit testing          
9 XXXX redacted          
8 Checksumcolor          
8 Minimal steps down to 1        
8 Non-transitive dice            
8 Numerical and alphabetical suffixes          
8 Powerful numbers        
8 Quoting constructs            
8 Resistance Network Calculator        
8 Tree datastructures        
8 User defined pipe and redirection operators          
7 16 Puzzle Game            
7 Compiler/Verifying Syntax        
7 Display an outline as a nested table          
7 Elliptic Curve Digital Signature Algorithm        
7 Fibonacci heap        
7 Graph colouring        
7 Multidimensional Newton-Raphson method          
7 Pseudo-random numbers/Combined recursive generator MRG32k3a          
7 Robots        
7 Rosetta Code/Rank languages by number of users          
7 Sort an outline at every level            
6 Brace expansion using ranges            
6 Continued fraction/Arithmetic/G(matrix NG, Contined Fraction N1, Contined Fraction N2)            
6 Mayan calendar          
6 OpenGL Pixel Shader            
6 OpenGL/Utah Teapot            
6 Pseudorandom Number Generator Image          
6 Recursive descent parser generator            
6 Rosetta Code/Run examples                
6 Rosetta Code/Tasks without examples            
6 Text to HTML            
6 URL shortener              
5 Addition-chain exponentiation            
5 Audio Overlap Loop                
5 Black Box              
5 Boids          
5 Hexapawn              
5 Raster bars            
5 Remote agent/Agent interface              
5 Remote agent/Agent logic              
5 Remote agent/Simulation              
5 Solve a Rubik's Cube            
5 Terminal control/Restricted width positional input/No wrapping            
5 Terminal control/Restricted width positional input/With wrapping            
5 Waveform analysis/Doh ray me          
4 Chess player              
4 Generalised floating point multiplication              
4 I'm a software engineer, get me out of here              
4 OLE Automation                
4 Process SMIL directives in XML data              
4 Strassen's algorithm              
4 Tamagotchi emulator                  
4 Unicode polynomial equation              
4 Using the Meetup.com API              
4 Weather Routing              
3 Latin Squares in reduced form/Randomizing using Jacobson and Matthews’ Technique                
3 Rosetta Code/List authors of task descriptions              
3 Solving coin problems              
3 Ukkonen’s Suffix Tree Construction              
3 Vidir                
3 Waveform analysis/Top and tail              
2 15 Puzzle Game in 3D                  
2 CLI-based maze-game                  
2 Doubly-linked list/Element removal                  
2 IRC gateway                  
1 Blackjack strategy                  
1 Create DWM statusbar                    
1 WalledMonument