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. 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 Go            ② Phix          ③ Julia         ④ Raku          ⑤ Perl         
    ⑥ Python        ⑦ Kotlin        ⑧ C             ⑨ Java          ⑩ Racket       
As of 2021-01-24T22:08:35Z :: Tasks: 1083 :: Draft Tasks:226 :: Total Tasks: 1309 :: Total Examples: 72530
Count Task
480 Hello world/Text
318 99 bottles of beer
313 100 doors
310 FizzBuzz
285 Factorial
285 Fibonacci sequence
272 Comments
261 A+B
256 Empty program
237 Function definition
226 Loops/Infinite
223 Reverse a string
222 Arrays
222 Loops/While
217 Ackermann function
205 Loops/For
200 Conditional structures
197 Greatest common divisor
195 Arithmetic/Integer
195 Greatest element of a list
186 Repeat a string
185 Array concatenation
184 Integer comparison
183 Even or odd
182 Averages/Arithmetic mean
181 Increment a numerical string
176 Hello world/Graphical
171 Copy a string
168 Boolean values
167 Loops/Downward for
165 Apply a callback to an array
165 Sieve of Eratosthenes
164 Character codes
163 Loops/N plus one half
163 String concatenation
162 Array length
162 Loops/Do-while
162 Sum and product of an array
161 Hello world/Newline omission
161 Loops/For with a specified step
161 Loops/Foreach
160 String length
158 Binary digits
158 Integer sequence
157 Loops/Break
157 Palindrome detection
157 Towers of Hanoi
156 String case
155 Sum of a series
154 Generic swap
154 Tokenize a string
153 Leap year
152 Dot product
152 Empty string
152 Hailstone sequence
152 Logical operations
152 Rot-13
152 Sum of squares
148 Associative array/Creation
148 Filter
147 Quine
146 Sorting algorithms/Bubble sort
145 Execute a system command
145 Sort an integer array
143 Factors of an integer
142 Guess the number
142 Higher-order functions
142 Roman numerals/Encode
140 Caesar cipher
140 Determine if a string is numeric
140 Remove duplicate elements
140 System time
139 File input/output
139 User input/Text
138 Sorting algorithms/Quicksort
137 Loop over multiple arrays simultaneously
136 Day of the week
136 Hello world/Standard error
135 Bitwise operations
135 Command-line arguments
134 Luhn test of credit card numbers
134 Primality by trial division
133 Read entire file
132 Create a file
131 Loops/Continue
131 Stack
131 Substring
130 Generate lower case ASCII alphabet
130 Sleep
129 Literals/String
128 Check that file exists
128 Happy numbers
128 Mutual recursion
127 Date format
127 Flatten a list
126 Least common multiple
126 Pascal's triangle
126 Zero to the zero power
124 ABC problem
123 Balanced brackets
123 Binary search
123 Literals/Integer
123 Program termination
121 Compound data type
121 Ethiopian multiplication
121 Include a file
121 Loops/Nested
120 Detect division by zero
120 Knuth shuffle
120 Variables
119 Associative array/Iteration
119 Formatted numeric output
119 Function composition
118 Null object
117 Averages/Root mean square
117 Count occurrences of a substring
117 Mandelbrot set
117 N-queens problem
117 Read a file line by line
116 Anagrams
116 File size
116 Hash from two arrays
116 Roman numerals/Decode
116 Search a list
115 Classes
115 Multiplication tables
115 Sorting algorithms/Insertion sort
114 Count in octal
114 Delete a file
114 Guess the number/With feedback
114 Real constants and functions
113 Case-sensitivity of identifiers
113 Matrix multiplication
113 Matrix transposition
112 Babbage problem
112 Environment variables
112 Identity matrix
112 Input loop
112 String matching
111 Align columns
111 Averages/Median
111 Hostname
111 Random numbers
110 Pick random element
110 Rename a file
109 Arithmetic/Complex
109 Find limit of recursion
109 HTTP
109 Haversine formula
109 Letter frequency
109 Perfect numbers
109 Return multiple values
108 Accumulator factory
107 Conway's Game of Life
107 Infinity
107 Pangram checker
106 Catalan numbers
105 Assertions
105 Horner's rule for polynomial evaluation
105 Permutations
105 Temperature conversion
104 Arithmetic-geometric mean
104 Averages/Pythagorean means
104 Levenshtein distance
104 Program name
104 Variadic function
103 Anonymous recursion
103 Evaluate binomial coefficients
103 Run-length encoding
103 Strip a set of characters from a string
103 Substring/Top and tail
102 Exceptions
102 Look-and-say sequence
102 Prime decomposition
102 Regular expressions
101 String append
100 Combinations
100 Queue/Definition
100 String interpolation (included)
100 Strip whitespace from a string/Top and tail
100 Trigonometric functions
100 Zig-zag matrix
99 Comma quibbling
99 Nth root
99 Reverse words in a string
99 Sorting algorithms/Merge sort
98 Shell one-liner
98 Short-circuit evaluation
97 24 game
97 Bulls and cows
97 Sorting algorithms/Selection sort
97 Sum multiples of 3 and 5
96 Call a function
96 Interactive programming  
96 Middle three digits
96 Ordered words
96 Sierpinski triangle
96 Y combinator
95 Arbitrary-precision integers (included)
95 Create a two-dimensional array at runtime
94 Collections
94 Enumerations
94 Power set
94 Range extraction
93 Inheritance/Single
93 Range expansion
93 Sorting algorithms/Gnome sort
93 String prepend
93 Vector products
92 Create an HTML table
92 Digital root
92 Evolutionary algorithm
92 Execute Brain****
92 Exponentiation operator
92 First-class functions
92 MD5
92 Time a function
91 Averages/Mode
91 Sequence of non-squares
91 Sorting algorithms/Cocktail sort
91 Sum digits of an integer
90 Sierpinski carpet
90 The Twelve Days of Christmas
90 Walk a directory/Non-recursively
89 Averages/Simple moving average
89 Cumulative standard deviation
89 JSON
89 One-dimensional cellular automata
89 Random number generator (included)
89 Sort using a custom comparator
88 Dragon curve
88 Forward difference
88 Langton's ant
88 Monty Hall problem
88 N'th
87 Entropy
87 Josephus problem
87 Sorting algorithms/Bogosort
87 String comparison
87 Symmetric difference
86 Hamming numbers
86 Harshad or Niven series
85 Abstract type
85 CSV data manipulation
85 Five weekends
85 Gray code
85 Greatest subsequential sum
85 Number names
84 Abundant, deficient and perfect number classifications
84 CSV to HTML translation
84 Map range
84 Price fraction
84 Window creation
83 Compare a list of strings
83 Hello world/Newbie
83 Menu
83 Sort an array of composite structures
83 Tree traversal
82 Closures/Value capture
82 File modification time
82 Last Friday of each month
82 Simple windowed application
82 Sorting algorithms/Heapsort
81 Monte Carlo methods
81 Queue/Usage
80 Box the compass
80 Hofstadter Q sequence
80 Introspection
80 Literals/Floating point
80 Non-decimal radices/Convert
80 SEDOLs
79 Amicable pairs
79 Catamorphism
79 Count the coins
79 Number reversal game
79 Singly-linked list/Traversal
79 URL decoding
79 Walk a directory/Recursively
79 Web scraping
78 Count in factors
78 Hello world/Line printer
78 Roots of unity
78 Set
78 Show the epoch
78 Spiral matrix
78 Terminal control/Clear the screen
78 XML/Input
77 Address of a variable
77 Bitmap
77 CRC-32
77 Calculating the value of e
77 Concurrent computing
77 Find common directory path
77 Floyd's triangle
77 Knapsack problem/0-1
77 Long multiplication
77 Multifactorial
77 Playing cards
77 Read a specific line from a file
77 Sockets
77 Sorting algorithms/Shell sort
77 Terminal control/Ringing the terminal bell
77 Top rank per group
76 Call an object method
76 Date manipulation
76 Linear congruential generator
76 Order two numerical lists
75 Almost prime
75 Dynamic variable names  
75 Jensen's Device
75 Kaprekar numbers
75 Keyboard input/Obtain a Y or N response  
75 Lucas-Lehmer test
75 Man or boy test
75 Pythagorean triples
75 Sorting algorithms/Counting sort
75 Strip comments from a string
75 URL encoding
75 Word wrap
74 Averages/Mean angle
74 Find the last Sunday of each month
74 Find the missing permutation
74 Here document  
74 List comprehensions
74 Modular inverse
74 Operator precedence
74 Proper divisors
73 Fibonacci n-step number sequences
73 Hello world/Web server
73 Non-decimal radices/Output
73 Sorting algorithms/Comb sort
73 Soundex
73 Unicode variable names
72 Anagrams/Deranged anagrams
72 Calendar
72 Exceptions/Catch an exception thrown in a nested call
72 Multiple distinct objects
72 Repeat
72 SHA-1
72 Semordnilap
72 Singly-linked list/Element definition
72 Split a character string based on change of character
71 AKS test for primes
71 Animation
71 Empty directory
71 Equilibrium index
71 Execute HQ9+
71 Gamma function
71 Longest common subsequence
71 Parsing/RPN calculator algorithm
71 Pi
71 SHA-256
71 Special characters
71 Sudoku
71 Take notes on the command line
71 Write entire file
70 Bitmap/Bresenham's line algorithm  
70 Convert seconds to compound duration
70 Enforced immutability
70 Phrase reversals
70 Polymorphism
70 Read a configuration file
70 Rock-paper-scissors
69 Call a foreign-language function
69 Draw a sphere
69 Euler's sum of powers conjecture
69 Flow-control structures
69 Four bit adder
69 Guess the number/With feedback (player)
69 IBAN
69 Quaternion type
69 Sort disjoint sublist
69 Stair-climbing puzzle
69 Vigenère cipher
69 Write float arrays to a text file
68 15 puzzle game
68 Catalan numbers/Pascal's triangle
68 Combinations with repetitions
68 Constrained random points on a circle
68 Horizontal sundial calculations
68 Numerical integration
68 Population count
68 Self-describing numbers
68 Show ASCII table
68 Sorting algorithms/Stooge sort
68 Trabb Pardo–Knuth algorithm
68 Zeckendorf number representation
67 Closest-pair problem
67 Currying
67 Euler method
67 Extend your language
67 Fork
67 Fractal tree
67 Jump anywhere
67 Largest int from concatenated ints
67 Maze generation
67 Munchausen numbers
67 Text processing/Max licenses in use
66 Arithmetic/Rational
66 Benford's law
66 Chinese remainder theorem
66 Magic squares of odd order
65 Amb  
65 Named parameters
65 Optional parameters
65 Priority queue
65 Sort stability
65 Special variables
65 Unix/ls
65 Variable size/Get  
64 Barnsley fern
64 Continued fraction
64 Documentation
64 Fast Fourier transform
64 General FizzBuzz
64 Hofstadter-Conway $10,000 sequence
64 Inheritance/Multiple
64 Morse code
64 Nested function
64 One of n lines in a file
64 Runtime evaluation    
64 XML/Output
63 Memory allocation
63 Remove lines from a file
63 Roots of a function
63 Singly-linked list/Element insertion
63 Sorting algorithms/Pancake sort
63 Strip control codes and extended characters from a string
62 Anti-primes
62 Cholesky decomposition
62 Factors of a Mersenne number
62 HTTPS
62 Narcissistic decimal number
62 Pernicious numbers
62 Roots of a quadratic function
62 Sequence of primes by trial division
62 Undefined values
62 Write language name in 3D ASCII
61 Animate a pendulum
61 Exponentiation order
61 Get system command output
61 Non-decimal radices/Input
61 Probabilistic choice
61 Reduced row echelon form
61 Rep-string
61 Sorting algorithms/Sleep sort
61 Thue-Morse
60 Arithmetic evaluation
60 Binary strings
60 Circles of given radius through two points
60 Department numbers
60 Globally replace text in several files
60 Knapsack problem/Continuous
60 Modular exponentiation
60 Old lady swallowed a fly
60 Plot coordinate pairs
60 Runge-Kutta method
60 Semiprime
60 Van der Corput sequence
59 24 game/Solve  
59 9 billion names of God the integer
59 Angle difference between two bearings
59 Averages/Mean time of day
59 Best shuffle
59 Draw a clock
59 Dutch national flag problem
59 Host introspection
59 Knapsack problem/Unbounded
59 Mouse position
59 Partial function application
59 Test a function
59 Unicode strings
59 User input/Graphical
59 Word frequency
58 Brownian tree
58 Emirp primes
58 Hash join  
58 Huffman coding
58 Tic-tac-toe
58 Truncatable primes
58 Yin and yang
57 4-rings or 4-squares puzzle
57 Bitmap/Write a PPM file  
57 Compile-time calculation    
57 Deal cards for FreeCell
57 Delegates
57 Generator/Exponential
57 Jewels and stones
57 Knight's tour
57 Left factorials
57 Leonardo numbers
57 Miller–Rabin primality test
57 Sort three variables
57 Sorting algorithms/Bead sort
56 2048
56 Add a variable to a class instance at runtime      
56 Doubly-linked list/Element definition
56 Draw a cuboid
56 Fibonacci word
56 I before E except after C
56 Integer overflow
56 JortSort
56 LZW compression
56 Matrix-exponentiation operator  
56 Odd word problem
56 Random number generator (device)
56 Rosetta Code/Rank languages by popularity
56 Scope modifiers
56 Singleton
56 Stem-and-leaf plot
56 Terminal control/Coloured text  
56 Two sum
55 Base64 encode data
55 Cartesian product of two or more lists
55 DNS query
55 Define a primitive data type  
55 Dinesman's multiple-dwelling problem
55 Discordian date
55 Extract file extension
55 Extreme floating point values
55 Forest fire  
55 Mad Libs
55 Sorting algorithms/Permutation sort
55 Stack traces
55 Stern-Brocot sequence
55 Terminal control/Display an extended character
54 CUSIP
54 Damm algorithm
54 Grayscale image
54 Longest common prefix
54 Multisplit
54 Munching squares
54 Runtime evaluation/In an environment    
54 Sierpinski triangle/Graphical
54 Synchronous concurrency
54 Topological sort
54 XML/XPath
53 100 prisoners
53 Abundant odd numbers
53 Draw a pixel
53 Ludic numbers
53 Maximum triangle path sum
53 Modulinos  
53 Pointers and references
53 Send email
53 Subleq
53 Terminal control/Cursor positioning  
53 Ternary logic
53 Truncate a file
53 XML/DOM serialization
52 Bernoulli numbers
52 First-class functions/Use numbers analogously    
52 Handle a signal
52 Inverted syntax
52 Keyboard input/Keypress check
52 Statistics/Basic
52 Text processing/2
52 Unbias a random generator
51 Convert decimal number to rational
51 Gaussian elimination
51 Iterated digits squaring
51 Long year    
51 Longest increasing subsequence
51 Non-continuous subsequences
51 Quickselect algorithm
51 Wireworld  
50 Attractive numbers
50 Base64 decode data  
50 Call a function in a shared library
50 Chinese zodiac
50 Colour bars/Display
50 Dijkstra's algorithm
50 Dining philosophers
50 Farey sequence
50 GUI component interaction
50 Heronian triangles
50 Loops/Increment loop index within loop body
50 Respond to an unknown method call    
50 Strip block comments
50 Universal Turing machine
50 Validate International Securities Identification Number
49 Archimedean spiral
49 FASTA format
49 Find the intersection of two lines
49 Fractran
49 Seven-sided dice from five-sided dice
49 Smith numbers
49 Text processing/1
48 Determine if a string has all the same characters
48 Doubly-linked list/Element insertion
48 Doubly-linked list/Traversal  
48 Greyscale bars/Display
48 Last letter-first letter
48 Longest common substring
48 Make directory path
48 Move-to-front algorithm
48 Polymorphic copy
48 Rate counter
48 Sattolo cycle
48 Shoelace formula for polygonal area
48 Tokenize a string with escaping
48 Vector
47 Append a record to the end of a text file
47 Chaos game
47 Echo server  
47 Extensible prime generator
47 Holidays related to Easter
47 Jaro distance
47 Magic 8-ball
47 Metaprogramming  
47 Polynomial regression
47 Zebra puzzle
46 Average loop length
46 Bitmap/Flood fill
46 Determinant and permanent
46 Determine if a string is collapsible  
46 Determine if only one instance is running
46 Egyptian division
46 History variables  
46 Longest string challenge
46 Naming conventions  
46 Pascal matrix generation
46 Search a list of records
46 Stable marriage problem
45 Active object
45 Execute a Markov algorithm
45 Hofstadter Figure-Figure sequences
45 Image noise
45 OpenGL
45 Password generator
45 Perfect shuffle
45 Pig the dice game
45 Send an unknown method call  
45 Set consolidation
45 Water collected between towers
44 Carmichael 3 strong pseudoprimes
44 Copy stdin to stdout
44 Determine if a string has all unique characters  
44 Doubly-linked list/Definition  
44 Element-wise operations
44 Elementary cellular automaton
44 GUI/Maximum window dimensions
44 Kronecker product
44 McNuggets problem
44 Narcissist
44 Polynomial long division
44 Rosetta Code/Count examples    
44 Sort numbers lexicographically
44 Sparkline in unicode
44 Verify distribution uniformity/Naive
43 Atomic updates
43 Bitmap/Read a PPM file  
43 Bulls and cows/Player
43 Generate Chess960 starting position
43 Keyboard input/Flush the keyboard buffer  
43 Knapsack problem/Bounded
43 MD5/Implementation
43 Parsing/Shunting-yard algorithm
43 RPG attributes generator
43 Sorting algorithms/Radix sort
43 Ulam spiral (for primes)
43 Visualize a tree
42 Aliquot sequence classifications
42 Associative array/Merging  
42 Cantor set
42 Digital root/Multiplicative digital root
42 Hickerson series of almost integers
42 Percentage difference between images
42 Subtractive generator
42 Van Eck sequence
42 Voronoi diagram
41 Bitmap/Midpoint circle algorithm  
41 Calendar - for "REAL" programmers    
41 Combinations and permutations
41 Currency
41 Deepcopy
41 Fusc sequence
41 Gapful numbers  
41 Hilbert curve
41 Kernighans large earthquake problem
41 Nim game
41 Pascal's triangle/Puzzle
41 Speech synthesis  
41 Spinning rod animation/Text
41 Start from a main routine    
41 Sum to 100
41 Table creation/Postal addresses  
41 Terminal control/Dimensions  
41 Text between
41 Twelve statements  
41 Variable size/Set  
40 Balanced ternary
40 Color of a screen pixel
40 GUI enabling/disabling of controls
40 Permutations/Derangements
40 Problem of Apollonius
40 Secure temporary file
40 Sorting algorithms/Strand sort
40 Summarize and say sequence
40 Variable-length quantity
39 Abbreviations, automatic  
39 Brace expansion
39 Casting out nines
39 Colour pinstripe/Display
39 Cramer's rule
39 Inverted index
39 Parametric polymorphism    
39 S-expressions
39 Sorting Algorithms/Circle Sort
39 Taxicab numbers
39 Topswops
39 Truth table
39 UTF-8 encode and decode
38 Break OO privacy    
38 Constrained genericity      
38 Euler's identity
38 Fivenum
38 Flipping bits game
38 ISBN13 check digit
38 Julia set
38 Knuth's algorithm S
38 Musical scale  
38 Parallel calculations
38 Permutations by swapping
38 Prime conspiracy
38 Primorial numbers
38 Scope/Function names and labels  
38 The Name Game  
37 Abbreviations, easy
37 Chowla numbers
37 Create a file on magnetic tape  
37 Feigenbaum constant calculation
37 Find palindromic numbers in both binary and ternary bases
37 Kahan summation
37 LU decomposition
37 Magic squares of doubly even order  
37 Order disjoint list items  
37 Parsing/RPN to infix conversion
37 Permutation test
37 Pythagorean quadruples
37 QR decomposition  
37 Ray-casting algorithm
37 Sailors, coconuts and a monkey problem
37 Sort a list of object identifiers
37 Statistics/Normal distribution
37 Vampire number
36 21 game  
36 Abbreviations, simple
36 Bell numbers  
36 Convex hull
36 Cuban primes
36 Days between dates  
36 Events    
36 Fibonacci word/fractal
36 File extension is in extensions list
36 Floyd-Warshall algorithm
36 Function prototype    
36 Input/Output for lines of text
36 Input/Output for pairs of numbers
36 Lychrel numbers  
36 MAC Vendor Lookup
36 MD4
36 Metered concurrency
36 Numerical integration/Gauss-Legendre Quadrature
36 Object serialization  
36 Pathological floating point problems
36 Permutations with repetitions
36 Read a file character by character/UTF8
36 Solve the no connection puzzle
36 Square but not cube
36 Terminal control/Hiding the cursor  
36 Terminal control/Inverse video  
35 Approximate equality
35 Bitmap/Bézier curves/Cubic    
35 Bitwise IO  
35 Brazilian numbers  
35 Find the intersection of a line with a plane
35 Largest number divisible by its digits  
35 Loops/Wrong ranges
35 Minesweeper game  
35 Multiline shebang    
35 Penney's game
35 Pinstripe/Display
35 Substitution cipher
35 Terminal control/Unicode output  
35 Test integerness
34 Arithmetic-geometric mean/Calculate Pi
34 Conjugate transpose  
34 Determine if a string is squeezable  
34 Display a linear combination
34 Egyptian fractions
34 Entropy/Narcissist
34 Humble numbers
34 Idiomatically determine all the lowercase and uppercase letters
34 Long primes
34 Maze solving
34 Metronome
34 Ordered partitions  
34 Remove vowels from a string  
34 Sutherland-Hodgman polygon clipping
34 Totient function
33 Check output device is a terminal  
33 Continued fraction/Arithmetic/Construct from rational number
33 Executable library  
33 Integer roots
33 Loops/With multiple ranges  
33 Parametrized SQL statement
33 Parse command-line arguments  
33 Pattern matching      
33 Pentagram
33 RIPEMD-160
33 Ranking methods
33 Recaman's sequence  
33 Rosetta Code/Find bare lang tags    
33 Square-free integers
33 Subset sum problem
33 Topic variable    
32 Bitcoin/address validation
32 Bitmap/Bézier curves/Quadratic    
32 Cheryl's birthday
32 Decimal floating point number to binary  
32 Execute SNUSP
32 Factorions  
32 Galton box animation
32 Mutex  
32 Partition an integer x into n primes
32 Pythagoras tree
32 Sorting algorithms/Patience sort
32 Type detection
32 URL parser  
31 Apply a digital filter (direct form II transposed)
31 Bitmap/Histogram  
31 Cycle detection
31 Determine if two triangles overlap
31 Eban numbers  
31 First class environments  
31 Multi-dimensional array
31 Multiple regression  
31 Multiplicative order
31 Negative base numbers
31 Numeric error propagation
31 RSA code
31 Resistor mesh
31 Rosetta Code/Find unimplemented tasks      
31 Safe primes and unsafe primes  
31 Set puzzle
31 Solve a Hidato puzzle
31 Straddling checkerboard
31 Terminal control/Cursor movement  
31 Textonyms
31 Write to Windows event log
30 Check Machin-like formulas  
30 Check input device is a terminal  
30 Church numerals    
30 Faulhaber's formula
30 Faulhaber's triangle
30 Four is magic
30 Implicit type conversion
30 Keyboard macros
30 Koch curve  
30 Mersenne primes  
30 Poker hand analyser
30 Reflection/List properties    
30 Simple database
30 Use another language to call a function    
30 Xiaolin Wu's line algorithm
30 Zhang-Suen thinning algorithm
29 Arena storage pool    
29 Chaocipher  
29 Chat server  
29 Checkpoint synchronization
29 Death Star  
29 Decision tables
29 Deconvolution/1D
29 Dice game probabilities
29 Draw a rotating cube
29 FTP
29 Gauss-Jordan matrix inversion  
29 HTTPS/Authenticated  
29 Memory layout of a data structure  
29 Mian-Chowla sequence  
29 Modular arithmetic
29 Old Russian measure of length
29 Palindrome dates    
29 Parallel brute force
29 Perfect totient numbers
29 Pragmatic directives  
29 Primality by Wilson's theorem    
29 Set of real numbers
29 Terminal control/Preserve screen
29 Window creation/X11
29 Word break problem  
28 AVL tree    
28 Bacon cipher
28 Bioinformatics/base count  
28 Chemical calculator
28 Compiler/lexical analyzer  
28 Diversity prediction theorem  
28 Find first and last set bit of a long integer
28 Formal power series
28 Honeycombs  
28 Isqrt (integer square root) of X  
28 Jacobi symbol  
28 Sequence: smallest number greater than previous term with exactly n divisors  
28 Sequence: smallest number with exactly n divisors  
28 Stream merge
28 Strong and weak primes  
28 Verify distribution uniformity/Chi-squared test
27 Active Directory/Connect  
27 Burrows–Wheeler transform  
27 Chebyshev coefficients
27 Find largest left truncatable prime in a given base
27 Go Fish  
27 Lah numbers  
27 Law of cosines - triples  
27 Palindromic gapful numbers    
27 Paraffins
27 Peano curve  
27 Polyspiral
27 Ramsey's theorem
27 Rosetta Code/Fix code tags    
27 Safe addition
27 Sexy primes  
27 Sorting algorithms/Cycle sort
27 State name puzzle
27 Sum and product puzzle
27 Superellipse
27 Update a configuration file
27 Weird numbers
27 Yellowstone sequence
26 Angles (geometric), normalization and conversion
26 Birthday problem
26 Cut a rectangle
26 Distributed programming      
26 Fairshare between two and more  
26 First power of 2 that has leading decimal digits of 12  
26 Image convolution
26 Natural sorting  
26 Nautical bell
26 Reflection/List methods    
26 Same fringe  
26 Smarandache prime-digital sequence    
26 Super-d numbers  
26 Table creation      
26 Thiele's interpolation formula
25 A* search algorithm  
25 Card shuffles
25 Color wheel  
25 Create an object at a given address      
25 Fermat numbers  
25 First perfect square in base n with n unique digits  
25 Fraction reduction
25 Idiomatically determine all the characters that can be used for symbols  
25 Kronecker product based fractals  
25 Length of an arc between two angles  
25 Machine code    
25 N-smooth numbers  
25 Nonoblock
25 Numbers with prime digits whose sum is 13    
25 RCRPG  
25 Sequence of primorial primes
25 Solve a Holy Knight's tour  
25 The ISAAC Cipher
25 Welch's t-test
25 World Cup group stage  
24 Abelian sandpile model    
24 Audio alarm      
24 Cipolla's algorithm
24 Elliptic curve arithmetic
24 Generate random chess position  
24 Hough transform
24 K-means++ clustering  
24 Magic squares of singly even order  
24 Pell's equation  
24 Perlin noise
24 Plasma effect
24 Play recorded sounds          
24 Ramer-Douglas-Peucker line simplification
24 Range consolidation
24 Sierpinski pentagon  
24 Simulate input/Keyboard    
24 Stirling numbers of the second kind  
24 Successive prime differences  
24 Unprimeable numbers
24 Yahoo! search interface      
24 Zumkeller numbers  
23 Base58Check encoding  
23 Circular primes  
23 Deming's Funnel  
23 Elementary cellular automaton/Random Number Generator  
23 Fixed length records        
23 Function frequency    
23 Main step of GOST 28147-89  
23 Make a backup file  
23 Markov chain text generator  
23 Mind boggling card trick    
23 Minimum positive multiple in base 10 using only 0 and 1    
23 Monads/Maybe monad      
23 Möbius function    
23 Permutations/Rank of a permutation
23 Record sound    
23 SOAP    
23 Stirling numbers of the first kind  
23 Superpermutation minimisation
23 Teacup rim text    
23 Tonelli-Shanks algorithm
23 Video display modes      
22 Commatizing numbers  
22 Create an object/Native demonstration  
22 Find duplicate files    
22 Find words with alternating vowels and consonants      
22 Intersecting number wheels  
22 Linux CPU utilization  
22 Lucky and even lucky numbers  
22 Numbers with equal rises and falls      
22 Parse an IP Address
22 Percolation/Mean run density  
22 Pierpont primes  
22 Reverse the gender of a string  
22 Spelling of ordinal numbers  
22 Total circles area
21 Active Directory/Search for a user        
21 Alternade words    
21 De Bruijn sequences  
21 Finite state machine  
21 Hunt the Wumpus      
21 Joystick position          
21 Kolakoski sequence  
21 List rooted trees
21 Magnanimous numbers      
21 Matrix chain multiplication
21 Next highest int from digits  
21 Orbital elements  
21 Pig the dice game/Player    
21 Playfair cipher    
21 Reflection/Get source      
21 Solve a Hopido puzzle  
21 Solve a Numbrix puzzle  
21 Sorting algorithms/Cocktail sort with shifting bounds    
21 Window management  
20 Addition chains
20 Data Encryption Standard  
20 Eertree  
20 Esthetic numbers    
20 Index finite lists of positive integers  
20 Kosaraju  
20 Longest common suffix      
20 Mastermind      
20 Median filter  
20 Native shebang    
20 Numeric separator syntax  
20 Random Latin squares  
20 Shortest common supersequence
20 Snake and Ladder
20 Sokoban
20 Tau number        
20 UPC  
20 Vogel's approximation method  
19 Assertions in design by contract    
19 Bilinear interpolation
19 Bioinformatics/Sequence mutation  
19 Code segment unload  
19 Color quantization  
19 Elementary cellular automaton/Infinite length    
19 Monads/List monad      
19 Montgomery reduction
19 N-body problem  
19 Names to numbers    
19 Perceptron    
19 Print debugging statement
19 Readline interface
19 Simulate input/Mouse    
19 Sunflower fractal    
19 Tau function        
19 Untrusted environment      
19 Vigenère cipher/Cryptanalysis
19 Words containing "the" substring        
18 ASCII art diagram converter    
18 Abelian sandpile model/Identity          
18 Arithmetic coding/As a generalized change of radix    
18 Bitcoin/public point to address    
18 Canonicalize CIDR    
18 Compiler/code generator    
18 Draw pixel 2  
18 EKG sequence convergence  
18 Extra primes      
18 Find URI in text      
18 Imaginary base numbers  
18 Increasing gaps between consecutive Niven numbers    
18 K-d tree  
18 Knuth's power tree  
18 Levenshtein distance/Alignment
18 Monads/Writer monad        
18 Pseudo-random numbers/PCG32  
18 SQL-based authentication
18 Selective file copy    
18 Sierpinski arrowhead curve        
18 Solve triangle solitare puzzle  
18 Sum data type      
18 Transportation problem      
18 Twin primes    
18 Ulam numbers    
18 Word wheel      
17 15 puzzle solver          
17 ABC words      
17 Compiler/syntax analyzer      
17 Compiler/virtual machine interpreter      
17 File size distribution  
17 Just in time processing on a character stream
17 Line circle intersection    
17 Mertens function      
17 Metallic ratios    
17 Odd words        
17 P-value correction  
17 Pancake numbers      
17 Percolation/Site percolation  
17 Primes - allocate descendants to their ancestors
17 Proof            
17 Self numbers      
17 Separate the house number from the street name    
17 Sum of divisors        
17 Zeckendorf arithmetic  
16 Aspect oriented programming  
16 Bitmap/Read an image through a pipe      
16 Changeable words    
16 Chernick's Carmichael numbers    
16 Free polyominoes enumeration    
16 HTTPS/Client-authenticated    
16 Matrix digital rain    
16 Most frequent k chars distance    
16 NYSIIS  
16 Nested templated data      
16 Nimber arithmetic      
16 Particle swarm optimization  
16 Polynomial synthetic division  
16 Prime words          
16 Product of divisors        
16 Pseudo-random numbers/Xorshift star      
16 Self-hosting compiler          
16 Terminal control/Positional read  
16 Vibrating rectangles    
16 Word search  
15 Bitmap/PPM conversion through a pipe      
15 Cyclotomic polynomial    
15 Find if a point is within a triangle  
15 Functional coverage tree    
15 Geometric algebra      
15 Latin Squares in reduced form    
15 Mayan numerals      
15 Nonogram solver    
15 Numerical integration/Adaptive Simpson's method  
15 Percolation/Bond percolation  
15 Percolation/Mean cluster density  
15 Rare numbers          
15 Rendezvous        
15 Retrieve and search chat history      
15 Singly-linked list/Element removal    
15 Snake    
15 Square root by hand      
15 Suffix tree  
14 Biorhythms        
14 Cistercian numerals        
14 Compare sorting algorithms' performance        
14 Compiler/AST interpreter      
14 Four is the number of letters in the ...  
14 Generalised floating point addition    
14 Getting the number of decimals  
14 Gradient descent        
14 Jaro-Winkler distance        
14 Logistic curve fitting in epidemiology  
14 Peaceful chess queen armies  
14 Permutations with some identical elements          
14 Pseudo-random numbers/Splitmix64      
14 Ramanujan's constant      
14 Tarjan    
14 Topological sort/Extracted top item
14 XML validation    
13 Banker's algorithm    
13 Calkin-Wilf sequence          
13 Deconvolution/2D+      
13 Factorial base numbers indexing permutations of a collection        
13 Long literals, with continuations          
13 Merge and aggregate datasets        
13 Partition function P      
13 Pisano period      
13 Sequence: nth number with exactly n divisors    
13 Sine wave      
12 Canny edge detector          
12 Continued fraction/Arithmetic/G(matrix ng, continued fraction n)      
12 Greed      
12 Interactive help        
12 Longest palindromic substrings        
12 OpenWebNet password    
12 Print itself        
12 Safe mode            
12 Sierpinski curve        
12 Simulated annealing        
12 XXXX redacted        
11 Almkvist-Giullera formula for pi        
11 Audio frequency generator            
11 Exponentiation with infix operators in (or operating on) the base          
11 Geohash        
11 Launch rocket with countdown and acceleration in stdout        
11 Minimal steps down to 1      
11 Pentomino tiling    
11 Run as a daemon or service          
11 Sierpinski square curve        
11 Sorting algorithms/Tree sort on a linked list      
11 Tetris          
11 Text completion        
11 VList        
10 Catmull–Clark subdivision surface            
10 Checksumcolor        
10 Colour pinstripe/Printer        
10 Combinations with repetitions/Square digit chain        
10 Execute CopyPasta Language      
10 External sort        
10 Faces from a mesh        
10 Minkowski question-mark function        
10 One-time pad  
10 Penrose tiling    
10 Powerful numbers        
10 Railway circuit      
10 Resistance calculator        
10 SHA-256 Merkle tree      
10 Spoof game      
10 Time-based one-time password algorithm          
10 Unit testing          
10 Using a speech engine to highlight words              
9 Curve that touches three points          
9 Display an outline as a nested table        
9 Fibonacci matrix-exponentiation        
9 French Republican calendar        
9 Hourglass puzzle        
9 IPC via named pipe          
9 Morpion solitaire        
9 Non-transitive dice          
9 Parse EBNF            
9 Pinstripe/Printer          
9 Quoting constructs            
9 Rosetta Code/Tasks without examples        
9 Starting a web browser        
9 Suffixation of decimal numbers        
9 Text to HTML        
9 Three word location        
9 War card game        
8 Count the coins/0-1          
8 Graph colouring        
8 Multidimensional Newton-Raphson method          
8 Numerical and alphabetical suffixes          
8 Pseudo-random numbers/Combined recursive generator MRG32k3a        
8 Range modifications        
8 Resistance network calculator        
8 Rosetta Code/Rank languages by number of users          
8 Sort an outline at every level          
8 Tree datastructures        
8 Two bullet roulette        
8 User defined pipe and redirection operators          
7 16 puzzle game            
7 Brace expansion using ranges          
7 Compiler/Verifying syntax        
7 Elliptic Curve Digital Signature Algorithm        
7 Fibonacci heap        
7 Mayan calendar          
7 Pseudorandom number generator image          
7 Robots        
7 URL shortener            
6 Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)            
6 Doubly-linked list/Element removal            
6 I'm a software engineer, get me out of here          
6 OpenGL pixel shader            
6 OpenGL/Utah Teapot            
6 Recursive descent parser generator            
6 Rosetta Code/Run examples                
6 Smallest enclosing circle problem          
5 Addition-chain exponentiation            
5 Audio overlap loop                
5 Black Box              
5 Boids          
5 Chess player            
5 Hexapawn              
5 Price list behind API            
5 Process SMIL directives in XML data            
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 Generalised floating point multiplication              
4 OLE automation                
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              
3 WiktionaryDumps to words                
2 15 puzzle game in 3D                  
2 CLI-based maze-game                  
2 IRC gateway                  
1 Blackjack strategy