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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 Racket
⑨ C
⑩ Java
As of 2020-07-12T21:01:26Z :: Tasks: 1060 :: Draft Tasks:194 :: Total Tasks: 1254 :: Total Examples: 68739
Count Task
464 Hello world/Text
310 99 Bottles of Beer
305 100 doors
300 FizzBuzz
276 Factorial
276 Fibonacci sequence
265 Comments
253 A+B
249 Empty program
231 Function definition
222 Loops/Infinite
219 Reverse a string
218 Arrays
216 Loops/While
211 Ackermann function
202 Loops/For
195 Conditional structures
194 Greatest element of a list
191 Arithmetic/Integer
184 Array concatenation
184 Greatest common divisor
183 Repeat a string
182 Averages/Arithmetic mean
182 Integer comparison
180 Boolean values
179 Increment a numerical string
178 Even or odd
178 Loops/Downward for
173 Hello world/Graphical
171 Copy a string
163 Character codes
162 Apply a callback to an array
160 Loops/Do-while
160 String concatenation
160 Sum and product of an array
159 Hello world/Newline omission
159 Loops/For with a specified step
158 Loops/Foreach
157 Binary digits
157 Loops/Break
157 Sieve of Eratosthenes
156 Array length
156 String length
155 Loops/N plus one half
154 Integer sequence
154 String case
154 Sum of a series
153 Palindrome detection
152 Generic swap
152 Leap year
151 Hailstone sequence
151 Tokenize a string
150 Logical operations
150 Towers of Hanoi
149 Empty string
149 Sum of squares
148 Dot product
148 Rot-13
147 Filter
145 Associative array/Creation
143 Execute a system command
143 Sort an integer array
143 Sorting algorithms/Bubble sort
141 Factors of an integer
140 Caesar cipher
140 Guess the number
139 Determine if a string is numeric
139 Higher-order functions
139 Quine
138 File input/output
138 User input/Text
137 Remove duplicate elements
136 Hello world/Standard error
136 System time
135 Roman numerals/Encode
134 Day of the week
133 Bitwise operations
133 Command-line arguments
133 Primality by trial division
133 Read entire file
131 Create a file
131 Sorting algorithms/Quicksort
130 Loop over multiple arrays simultaneously
130 Luhn test of credit card numbers
130 Substring
129 Sleep
129 Stack
128 Check that file exists
128 Loops/Continue
127 Literals/String
125 Generate lower case ASCII alphabet
125 Mutual recursion
125 Pascal's triangle
123 Date format
123 Least common multiple
122 Happy numbers
121 Binary search
121 Include a file  
121 Literals/Integer
120 Detect division by zero
120 Flatten a list
120 Variables
120 Zero to the zero power
119 Balanced brackets
119 Compound data type
119 Program termination
118 Associative array/Iteration
118 Formatted numeric output
118 Knuth shuffle
118 Loops/Nested
117 ABC Problem
116 Averages/Root mean square
116 Null object
116 Read a file line by line
115 File size
115 Function composition
115 Mandelbrot set
114 Classes
114 Delete a file
114 Ethiopian multiplication
114 Hash from two arrays
114 Search a list
113 Count in octal
113 Sorting algorithms/Insertion sort
112 Count occurrences of a substring
112 Guess the number/With feedback
112 Input loop
111 Averages/Median
111 Case-sensitivity of identifiers
111 Hostname  
111 Multiplication tables
111 N-queens problem
111 Real constants and functions
111 Roman numerals/Decode
110 Environment variables
110 Identity matrix
110 Matrix multiplication
110 Random numbers
110 Rename a file
109 HTTP
109 Matrix transposition
108 Haversine formula
108 Pick random element
108 Return multiple values
108 String matching
107 Babbage problem
106 Accumulator factory
106 Align columns
106 Arithmetic/Complex
106 Find limit of recursion
106 Letter frequency
106 Pangram checker
106 Perfect numbers
105 Anagrams
105 Assertions
104 Averages/Pythagorean means
104 Catalan numbers
104 Conway's Game of Life
104 Horner's rule for polynomial evaluation
104 Program name
103 Infinity
103 Temperature conversion
103 Variadic function
102 Evaluate binomial coefficients
101 Exceptions
101 Levenshtein distance
101 Regular expressions
101 Strip a set of characters from a string
100 Arithmetic-geometric mean
100 Nth root
100 Permutations
100 Run-length encoding
100 Substring/Top and tail
100 Zig-zag matrix
99 Combinations
99 Reverse words in a string
99 String append
99 String interpolation (included)
99 Trigonometric functions
98 Anonymous recursion
98 Queue/Definition
98 Short-circuit evaluation
98 Strip whitespace from a string/Top and tail
97 Prime decomposition
96 Comma quibbling
96 Shell one-liner
96 Sorting algorithms/Selection sort
95 24 game
95 Bulls and cows
95 Look-and-say sequence
95 Ordered words
95 Sorting algorithms/Merge sort
94 Call a function
94 Create a two-dimensional array at runtime
94 Enumerations
94 Interactive programming  
93 Collections
93 Middle three digits
93 Range extraction
93 Y combinator
92 Sierpinski triangle
92 String prepend
92 Sum multiples of 3 and 5
92 Time a function
91 Arbitrary-precision integers (included)
91 Exponentiation operator
91 Power set
91 Range expansion
91 Vector products
90 First-class functions
90 Inheritance/Single
90 MD5
90 Random number generator (included)
90 Sum digits of an integer
89 Create an HTML table
89 Cumulative standard deviation
89 One-dimensional cellular automata
89 Sequence of non-squares
89 Sorting algorithms/Gnome sort
89 Walk a directory/Non-recursively
88 Averages/Simple moving average
88 Sorting algorithms/Cocktail sort
87 Averages/Mode
87 Evolutionary algorithm
87 N'th
86 Entropy
86 Five weekends
86 Langton's ant
86 Sierpinski carpet
86 Sort using a custom comparator
85 Digital root
85 Execute Brain****
85 Forward difference
85 Hamming numbers
85 JSON
84 Monty Hall problem
84 Sorting algorithms/Bogosort
84 Symmetric difference
84 Window creation
83 Abstract type
83 Dragon curve
83 Greatest subsequential sum
83 Harshad or Niven series
83 Josephus problem
83 Price fraction
82 Abundant, deficient and perfect number classifications
82 CSV to HTML translation
82 Closures/Value capture
82 File modification time
82 Gray code
82 Last Friday of each month
82 String comparison
82 The Twelve Days of Christmas
81 CSV data manipulation
81 Menu
81 Simple windowed application
81 Tree traversal
80 Amicable pairs
80 Box the compass
80 Map range
80 Number names  
80 Sorting algorithms/Heapsort
79 Introspection
79 Literals/Floating point
79 Queue/Usage
79 SEDOLs
79 Sort an array of composite structures
78 Hello world/Line printer
78 Hello world/Newbie
78 Monte Carlo methods
78 Non-decimal radices/Convert
78 Read a specific line from a file
78 Singly-linked list/Traversal
78 Web scraping
77 Catamorphism
77 Count in factors
77 Floyd's triangle
77 Number reversal game
77 Set
77 Sockets
77 Sorting algorithms/Shell sort
77 Spiral matrix
77 Terminal control/Clear the screen
77 Terminal control/Ringing the terminal bell
77 URL decoding
77 Walk a directory/Recursively
77 XML/Input
76 Calculating the value of e
76 Call an object method
76 Playing cards
75 Address of a variable  
75 Compare a list of strings
75 Concurrent computing
75 Date manipulation
75 Pythagorean triples
75 Roots of unity
75 Show the epoch
74 Bitmap
74 CRC-32
74 Find the last Sunday of each month
74 Hofstadter Q sequence
74 Knapsack problem/0-1
74 Multifactorial
74 Order two numerical lists
74 Top rank per group
74 URL encoding
73 Almost prime
73 Count the coins
73 Dynamic variable names    
73 Fibonacci n-step number sequences
73 Find common directory path
73 Hello world/Web server
73 Here document  
73 Lucas-Lehmer test
73 Proper divisors
73 Strip comments from a string
72 Averages/Mean angle
72 Kaprekar numbers
72 Keyboard input/Obtain a Y or N response  
72 List comprehensions
72 Long multiplication
72 Man or boy test
72 Sorting algorithms/Counting sort
72 Soundex
72 Unicode variable names
71 Equilibrium index
71 Exceptions/Catch an exception thrown in a nested call
71 Find the missing permutation
71 Gamma function
71 Non-decimal radices/Output
71 Operator precedence
71 Singly-linked list/Element definition
71 Special characters
71 Take notes on the command line
70 Empty directory
70 Linear congruential generator
70 SHA-1
70 SHA-256
70 Semordnilap
70 Sorting algorithms/Comb sort
70 Word wrap
69 Bitmap/Bresenham's line algorithm  
69 Calendar
69 Jensen's Device
69 Modular inverse
69 Parsing/RPN calculator algorithm
69 Phrase reversals
69 Polymorphism
69 Quaternion type
69 Read a configuration file
69 Sudoku
69 Write entire file
68 Animation
68 Convert seconds to compound duration
68 IBAN
68 Multiple distinct objects
68 Pi
68 Repeat
68 Rock-paper-scissors
68 Self-describing numbers
68 Stair-climbing puzzle
68 Vigenère cipher
67 AKS test for primes
67 Execute HQ9+
67 Flow-control structures
67 Four bit adder
67 Longest common subsequence
67 Sorting algorithms/Stooge sort
67 Split a character string based on change of character
67 Write float arrays to a text file
66 Anagrams/Deranged anagrams
66 Call a foreign-language function
66 Currying
66 Fork
66 Guess the number/With feedback (player)
66 Trabb Pardo–Knuth algorithm
65 15 Puzzle Game  
65 Benford's law
65 Catalan numbers/Pascal's triangle
65 Constrained random points on a circle
65 Enforced immutability
65 Euler's sum of powers conjecture
65 Horizontal sundial calculations
65 Magic squares of odd order
65 Maze generation
65 Munchausen numbers
65 Named parameters
65 Sort disjoint sublist
65 Variable size/Get  
65 Zeckendorf number representation
64 Arithmetic/Rational
64 Closest-pair problem
64 Draw a sphere
64 Euler method
64 Extend your language  
64 Fractal tree
64 Inheritance/Multiple
64 Largest int from concatenated ints
64 Numerical integration
64 Runtime evaluation    
63 Combinations with repetitions
63 Continued fraction
63 Sort stability
63 Special variables
63 Unix/ls
63 Van der Corput sequence
63 XML/Output
62 Documentation
62 Fast Fourier transform
62 Hofstadter-Conway $10,000 sequence
62 Jump anywhere
62 Morse code
62 Narcissistic decimal number
62 Remove lines from a file
62 Roots of a function
62 Singly-linked list/Element insertion
62 Strip control codes and extended characters from a string
62 Text processing/Max licenses in use
61 Amb  
61 Cholesky decomposition
61 HTTPS
61 Nested function
61 One of n lines in a file
61 Optional parameters
61 Population count
60 Barnsley fern
60 Chinese remainder theorem
60 Factors of a Mersenne number
60 Memory allocation
60 Pernicious numbers
60 Priority queue
60 Probabilistic choice
60 Rep-string
60 Roots of a quadratic function
60 Sequence of primes by trial division
60 Show Ascii table
60 Undefined values
60 Write language name in 3D ASCII
59 Averages/Mean time of day
59 Binary strings
59 Host introspection
59 Sorting algorithms/Pancake sort
59 Sorting algorithms/Sleep sort
58 Arithmetic evaluation
58 Circles of given radius through two points
58 Exponentiation order
58 Get system command output
58 Globally replace text in several files
58 Non-decimal radices/Input
58 Old lady swallowed a fly
58 Partial function application
58 Runge-Kutta method
58 Tic-tac-toe
58 User input/Graphical
57 24 game/Solve
57 Animate a pendulum
57 General FizzBuzz
57 Generator/Exponential
57 Huffman coding
57 Miller–Rabin primality test
57 Modular exponentiation
57 Mouse position
57 Plot coordinate pairs
57 Reduced row echelon form
57 Semiprime
57 Test a function  
57 Thue-Morse
56 Brownian tree
56 Draw a clock
56 Dutch national flag problem
56 Hash join  
56 Knapsack problem/Unbounded
56 Knight's tour
56 LZW compression
56 Left factorials
56 Stem-and-leaf plot
56 XML/XPath  
55 Add a variable to a class instance at runtime      
55 Angle difference between two bearings
55 Anti-primes
55 Compile-time calculation    
55 Deal cards for FreeCell
55 Department Numbers
55 Emirp primes
55 Extreme floating point values
55 Knapsack problem/Continuous
55 Singleton
55 Sorting algorithms/Bead sort
55 Terminal control/Display an extended character
55 Truncatable primes  
55 Unicode strings
54 Best shuffle
54 Define a primitive data type  
54 Delegates
54 Fibonacci word
54 Forest fire  
54 Integer overflow
54 Multisplit
54 Odd word problem
54 Runtime evaluation/In an environment    
54 Scope modifiers
54 Stack traces
54 Topological sort
54 Two Sum
54 Yin and yang
53 4-rings or 4-squares puzzle  
53 9 billion names of God the integer
53 Dinesman's multiple-dwelling problem
53 Extract file extension
53 Munching squares
53 Random number generator (device)
53 Send email
53 Sort three variables
53 Sorting algorithms/Permutation sort
53 Synchronous concurrency
52 Bitmap/Write a PPM file  
52 CUSIP
52 Doubly-linked list/Element definition
52 Draw a cuboid
52 Handle a signal
52 I before E except after C
52 Inverted syntax
52 Iterated digits squaring
52 JortSort
52 Leonardo numbers
52 Matrix-exponentiation operator  
52 Pointers and references  
52 Rosetta Code/Rank languages by popularity  
52 Terminal control/Cursor positioning    
52 Truncate a file
52 XML/DOM serialization
51 Grayscale image
51 Maximum triangle path sum
51 Modulinos  
51 Sierpinski triangle/Graphical
51 Statistics/Basic
51 Text processing/2
51 Word frequency
50 Base64 encode data
50 Bernoulli numbers
50 Cartesian product of two or more lists
50 Convert decimal number to rational
50 Dining philosophers
50 Non-continuous subsequences
50 Quickselect algorithm
50 Ternary logic
50 Unbias a random generator
50 Wireworld  
49 2048  
49 Discordian date
49 First-class functions/Use numbers analogously    
49 Heronian triangles
49 Keyboard input/Keypress check
49 Ludic numbers
49 Mad Libs  
49 Seven-sided dice from five-sided dice
49 Terminal control/Coloured text  
49 Universal Turing machine
49 Validate International Securities Identification Number
48 FASTA format
48 Farey sequence
48 Longest increasing subsequence
48 Respond to an unknown method call    
48 Text processing/1
47 Call a function in a shared library
47 DNS query      
47 Dijkstra's algorithm
47 GUI component interaction  
47 Gaussian elimination
47 Longest common prefix
47 Polynomial regression
47 Rate counter
47 Subleq
47 Zebra puzzle
46 Doubly-linked list/Traversal  
46 Extensible prime generator
46 Fractran
46 Greyscale bars/Display
46 Longest string challenge
46 Loops/Increment loop index within loop body
46 Move-to-front algorithm
46 Polymorphic copy
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 Archimedean spiral
45 Attractive numbers
45 Chinese zodiac
45 Determine if only one instance is running
45 Doubly-linked list/Element insertion
45 Find the intersection of two lines
45 Holidays related to Easter
45 Make directory path
45 Metaprogramming  
45 Naming conventions  
45 Pascal matrix generation
45 Strip block comments
45 Vector
44 Abundant odd numbers
44 Append a record to the end of a text file
44 Carmichael 3 strong pseudoprimes
44 Colour bars/Display
44 Echo server  
44 History variables  
44 Jaro distance
44 Last letter-first letter
44 Perfect shuffle
44 Pig the dice game
44 Rosetta Code/Count examples    
44 Send an unknown method call  
44 Set consolidation
43 Draw a pixel
43 Execute a Markov algorithm
43 Hofstadter Figure-Figure sequences  
43 Image noise
43 Parsing/Shunting-yard algorithm
43 Password generator
43 Polynomial long division
43 Verify distribution uniformity/Naive
43 Visualize a tree
42 Average loop length
42 Base64 decode data  
42 Bitmap/Flood fill
42 Bitmap/Read a PPM file  
42 Determinant and permanent
42 Doubly-linked list/Definition  
42 Element-wise operations
42 Generate Chess960 starting position
42 Kronecker product
42 OpenGL
42 Percentage difference between images
42 Sattolo cycle
42 Sparkline in unicode
42 Ulam spiral (for primes)
41 100 prisoners
41 Active object
41 Atomic updates
41 Bulls and cows/Player
41 Chaos game
41 Damm algorithm
41 Egyptian division
41 Jewels and Stones
41 Keyboard input/Flush the keyboard buffer  
41 MD5/Implementation
41 Narcissist
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 Digital root/Multiplicative digital root
40 Elementary cellular automaton
40 Hickerson series of almost integers
40 McNuggets Problem
40 Problem of Apollonius
40 Subtractive generator
40 Terminal control/Dimensions  
39 Aliquot sequence classifications
39 Cantor set
39 Determine if a string has all the same characters
39 Fusc sequence
39 Knapsack problem/Bounded
39 Longest Common Substring
39 Parametric polymorphism    
39 Permutations/Derangements
39 S-Expressions
39 Sort numbers lexicographically
39 Sorting algorithms/Radix sort
39 Sorting algorithms/Strand sort
39 Text between
38 Casting out nines
38 Color of a screen pixel
38 Combinations and permutations
38 Constrained genericity      
38 GUI enabling/disabling of controls  
38 GUI/Maximum window dimensions
38 Parallel calculations
38 Pascal's triangle/Puzzle
38 Speech synthesis  
38 Topswops
38 UTF-8 encode and decode
38 Variable-length quantity
38 Voronoi diagram
37 Balanced ternary
37 Break OO privacy    
37 Deepcopy
37 Flipping bits game
37 Inverted index
37 Kernighans large earthquake problem
37 LU decomposition
37 Parsing/RPN to infix conversion
37 Permutations by swapping
37 Prime conspiracy
37 Pythagorean quadruples
37 QR decomposition  
37 RPG Attributes Generator
37 Ray-casting algorithm
37 Self-referential sequence
37 Sort a list of object identifiers
37 Statistics/Normal distribution
37 Taxicab numbers
37 Terminal control/Inverse video  
37 Van Eck sequence
37 Water collected between towers
36 Determine if a string has all unique characters  
36 Hilbert curve
36 Julia set
36 Knuth's algorithm S
36 Magic squares of doubly even order  
36 Permutation test
36 Primorial numbers
36 Terminal control/Hiding the cursor  
36 Vampire number
35 Bell numbers  
35 Bitmap/Midpoint circle algorithm      
35 Chowla numbers  
35 Cramer's rule
35 Euler's identity
35 Events    
35 File extension is in extensions list
35 Find palindromic numbers in both binary and ternary bases
35 Function prototype    
35 Lychrel numbers  
35 MD4
35 Metered concurrency
35 Minesweeper game  
35 Multiline shebang    
35 Musical scale  
35 Nim Game
35 Numerical integration/Gauss-Legendre Quadrature
35 Object serialization  
35 Order disjoint list items  
35 Permutations with repetitions
35 Sailors, coconuts and a monkey problem
35 Scope/Function names and labels  
35 Terminal control/Unicode output  
34 Abbreviations, automatic  
34 Colour pinstripe/Display
34 Cuban primes
34 Currency
34 Fivenum
34 Floyd-Warshall algorithm
34 Input/Output for Pairs of Numbers
34 Pathological floating point problems
34 Sorting Algorithms/Circle Sort
34 Square but not cube
34 Sutherland-Hodgman polygon clipping
34 Test integerness
33 Bitwise IO  
33 Brace expansion  
33 Create a file on magnetic tape  
33 Determine if a string is collapsible  
33 Executable library  
33 Feigenbaum constant calculation
33 Input/Output for Lines of Text
33 Kahan summation
33 Long year?    
33 MAC Vendor Lookup
33 Magic 8-Ball
33 Maze solving
33 Parametrized SQL statement
33 Penney's game
33 RIPEMD-160
33 Read a file character by character/UTF8
33 Square-free integers
32 Associative array/Merging    
32 Bitcoin/address validation
32 Bitmap/Bézier curves/Cubic    
32 Check output device is a terminal  
32 Entropy/Narcissist
32 Fibonacci word/fractal
32 Humble numbers
32 Largest number divisible by its digits  
32 Ordered Partitions  
32 Pinstripe/Display
32 Pythagoras tree
32 Ranking methods
32 Rosetta Code/Find bare lang tags      
32 Substitution Cipher
32 Totient function
32 Truth table
32 URL parser  
31 Arithmetic-geometric mean/Calculate Pi
31 Conjugate transpose  
31 Copy stdin to stdout
31 Days between dates  
31 Egyptian fractions
31 Find the intersection of a line with a plane
31 Galton box animation
31 Gapful numbers  
31 Integer roots
31 Long primes
31 Multiple regression  
31 Mutex  
31 Parse command-line arguments  
31 RSA code
31 Recaman's sequence  
31 Set puzzle
31 Solve the no connection puzzle  
31 Straddling checkerboard
31 Subset sum problem
31 Topic variable    
31 Write to Windows event log
30 Abbreviations, simple
30 Approximate Equality
30 Bitmap/Bézier curves/Quadratic    
30 Bitmap/Histogram  
30 Continued fraction/Arithmetic/Construct from rational number
30 Convex hull
30 Metronome
30 Multiplicative order
30 Numeric error propagation
30 Partition an integer X into N primes
30 Pattern matching      
30 Pentagram
30 Poker hand analyser
30 Reflection/List properties    
30 Resistor mesh
30 Simple database
30 Solve a Hidato puzzle
30 Terminal control/Cursor movement  
30 The Name Game  
29 Abbreviations, easy
29 Check Machin-like formulas  
29 Check input device is a terminal  
29 Cycle detection
29 Decimal floating point number to binary  
29 Display a linear combination
29 Execute SNUSP
29 First class environments  
29 Keyboard macros
29 Loops/Wrong ranges
29 Loops/with multiple ranges  
29 Negative base numbers
29 Use another language to call a function    
29 Window creation/X11
29 Zhang-Suen thinning algorithm
28 Brazilian numbers  
28 Checkpoint synchronization
28 Deconvolution/1D
28 Determine if a string is squeezable  
28 FTP
28 Idiomatically determine all the lowercase and uppercase letters
28 Implicit type conversion
28 Memory layout of a data structure    
28 Mersenne primes  
28 Rosetta Code/Find unimplemented tasks        
28 Safe primes and unsafe primes  
28 Set of real numbers
28 Sorting algorithms/Patience sort
28 Terminal control/Preserve screen
28 Textonyms
28 Xiaolin Wu's line algorithm
27 Active Directory/Connect  
27 Apply a digital filter (direct form II transposed)  
27 Bacon cipher
27 Chat server  
27 Cheryl's Birthday
27 Church Numerals    
27 Compiler/lexical analyzer  
27 Death Star  
27 Eban numbers  
27 Formal power series
27 HTTPS/Authenticated  
27 Koch curve  
27 Multi-dimensional array
27 Parallel Brute Force
27 Perfect totient numbers
27 Pragmatic directives  
27 Rosetta Code/Fix code tags    
27 Sorting algorithms/Cycle sort
27 State name puzzle
27 Update a configuration file
27 Verify distribution uniformity/Chi-squared test
26 Arena storage pool    
26 Chaocipher  
26 Decision tables
26 Dice game probabilities
26 Distributed programming      
26 Faulhaber's formula  
26 Faulhaber's triangle
26 Find first and last set bit of a long integer
26 Find largest left truncatable prime in a given base
26 Go Fish  
26 Honeycombs  
26 Mian-Chowla sequence  
26 Modular arithmetic
26 Natural sorting  
26 Nautical bell
26 Paraffins
26 Ramsey's theorem
26 Reflection/List methods    
26 Safe addition
26 Same Fringe  
26 Strong and weak primes  
26 Superellipse
26 Table creation      
25 AVL tree    
25 Create an object at a given address      
25 Factorions  
25 ISBN13 check digit    
25 Image convolution
25 Law of cosines - triples  
25 Old Russian measure of length
25 Polyspiral  
25 Sequence: smallest number with exactly n divisors  
25 The ISAAC Cipher
24 Card shuffles
24 Determine if two triangles overlap
24 Lah numbers  
24 Plasma effect
24 RCRPG  
24 Sequence of primorial primes
24 Sexy primes  
24 Simulate input/Keyboard    
24 Solve a Holy Knight's tour  
24 Sum and Product Puzzle  
24 Thiele's interpolation formula
24 Type detection    
24 Weird numbers  
24 Word break problem  
24 Yahoo! search interface      
23 Birthday problem
23 Burrows–Wheeler transform  
23 Chebyshev coefficients
23 Chemical Calculator  
23 Fairshare between two and more  
23 First perfect square in base N with N unique digits  
23 Four is magic
23 Fraction reduction
23 Generate random chess position  
23 Hough transform
23 Jacobi symbol    
23 K-means++ clustering    
23 Kronecker product based fractals  
23 Machine code    
23 Main step of GOST 28147-89  
23 Make a backup file  
23 Palindrome dates    
23 Perlin noise
23 Play recorded sounds          
23 Ramer-Douglas-Peucker line simplification
23 Record sound    
23 SOAP    
23 Sequence: smallest number greater than previous term with exactly n divisors  
23 Sierpinski pentagon  
23 Smarandache prime-digital sequence    
23 Stream Merge  
23 Welch's t-test
23 Zumkeller numbers  
22 A* search algorithm  
22 Base58Check encoding  
22 Cipolla's algorithm
22 Deming's Funnel  
22 Diversity prediction theorem    
22 Draw a rotating cube
22 Fermat numbers  
22 First power of 2 that has leading decimal digits of 12  
22 Function frequency    
22 Idiomatically determine all the characters that can be used for symbols  
22 Linux CPU utilization  
22 Magic squares of singly even order  
22 Pell's equation  
22 Percolation/Mean run density  
22 Permutations/Rank of a permutation
22 Range consolidation
22 Reverse the gender of a string  
22 Superpermutation minimisation
22 Teacup rim text    
22 Tonelli-Shanks algorithm
22 Total circles area
22 World Cup group stage  
21 Active Directory/Search for a user        
21 AudioAlarm      
21 Color wheel  
21 Create an object/Native demonstration  
21 Cut a rectangle
21 Elementary cellular automaton/Random Number Generator  
21 Intersecting Number Wheels  
21 Markov chain text generator  
21 Nonoblock  
21 Palindromic gapful numbers      
21 Parse an IP Address
21 Pig the dice game/Player    
21 Playfair cipher    
21 Successive prime differences    
21 Video display modes      
21 Window management  
20 Addition chains
20 Commatizing numbers  
20 Elliptic curve arithmetic
20 Fixed length records        
20 Joystick position          
20 Median filter  
20 Monads/Maybe monad        
20 N-smooth numbers  
20 Native shebang    
20 Numeric separator syntax  
20 Shortest common supersequence
20 Snake And Ladder
20 Sokoban
20 Solve a Hopido puzzle  
20 Solve a Numbrix puzzle    
20 Stirling numbers of the first kind    
20 Stirling numbers of the second kind    
20 Super-d numbers    
20 Unprimeable numbers    
20 Yellowstone sequence      
19 Angles (geometric), normalization and conversion    
19 Bilinear interpolation
19 Find duplicate files    
19 Finite state machine  
19 Hunt The Wumpus      
19 Lucky and even lucky numbers    
19 Mastermind      
19 Mind boggling card trick      
19 N-body problem  
19 Orbital elements  
19 Pierpont primes  
19 Readline interface
19 Reflection/Get source      
19 Simulate input/Mouse    
19 Spelling of ordinal numbers  
18 Circular primes    
18 Code segment unload  
18 Color quantization  
18 Data Encryption Standard    
18 Eertree  
18 K-d tree  
18 Kolakoski sequence  
18 Monads/List monad      
18 Monads/Writer monad        
18 Peano curve    
18 Random Latin Squares    
18 SQL-based authentication
18 Selective File Copy    
18 Sunflower fractal    
18 Untrusted environment      
18 Vigenère cipher/Cryptanalysis
17 Arithmetic coding/As a generalized change of radix    
17 Assertions in design by contract      
17 Bitcoin/public point to address    
17 Compiler/code generator    
17 De Bruijn sequences  
17 Elementary cellular automaton/Infinite length    
17 Index finite lists of positive integers  
17 Just in time processing on a character stream
17 Kosaraju  
17 Levenshtein distance/Alignment  
17 List rooted trees  
17 Magnanimous numbers      
17 Mertens function      
17 Montgomery reduction
17 Names to numbers    
17 P-value correction  
17 Perceptron      
17 Percolation/Site percolation  
17 Primes - allocate descendants to their ancestors
17 Print debugging statement
17 Solve triangle solitare puzzle  
17 Sum data type      
17 Zeckendorf arithmetic  
16 Abelian sandpile model      
16 Aspect Oriented Programming  
16 Bioinformatics/Sequence mutation  
16 Compiler/syntax analyzer      
16 Compiler/virtual machine interpreter      
16 EKG sequence convergence  
16 File size distribution  
16 Find URI in text        
16 Gauss-Jordan matrix inversion      
16 HTTPS/Client-authenticated    
16 Imaginary base numbers  
16 Knuth's power tree  
16 Particle Swarm Optimization  
16 Polynomial synthetic division  
16 Primality by Wilson's theorem    
16 Self-hosting compiler          
16 Separate the house number from the street name    
16 Vogel's approximation method  
16 Word search  
15 Bioinformatics/base count    
15 Draw pixel 2    
15 Esthetic numbers      
15 Free polyominoes enumeration      
15 Geometric algebra      
15 Increasing gaps between consecutive Niven numbers      
15 Matrix Digital Rain    
15 NYSIIS  
15 Nested templated data      
15 Next highest int from digits    
15 Nonogram solver    
15 Percolation/Bond percolation  
15 Percolation/Mean cluster density  
15 Rendezvous        
15 Retrieve and search chat history        
15 Sorting algorithms/Cocktail sort with shifting bounds        
15 Suffix tree  
15 Terminal control/Positional read    
15 Transportation problem      
14 15 puzzle solver          
14 Bitmap/Read an image through a pipe      
14 Matrix chain multiplication    
14 Mayan numerals      
14 Most frequent k chars distance    
14 Numerical integration/Adaptive Simpson's method  
14 Peaceful chess queen armies  
14 Proof              
14 Vibrating rectangles    
13 21 Game    
13 Bitmap/PPM conversion through a pipe      
13 Compare sorting algorithms' performance        
13 Compiler/AST interpreter      
13 Four is the number of letters in the ...  
13 Functional coverage tree    
13 Generalised floating point addition    
13 Latin Squares in reduced form      
13 Metallic ratios    
13 Minimum positive multiple in base 10 using only 0 and 1        
13 Möbius function        
13 Permutations with some identical elements          
13 Sequence: nth number with exactly n divisors    
13 Singly-linked list/Element removal      
13 Snake      
13 Tarjan    
13 Topological sort/Extracted top item
13 XML Validation      
12 Banker's algorithm    
12 Chernick's Carmichael numbers      
12 Continued fraction/Arithmetic/G(matrix NG, Contined Fraction N)      
12 Cyclotomic Polynomial    
12 Deconvolution/2D+      
12 OpenWebNet Password    
12 Pisano period      
12 Ramanujan's constant      
12 Rare numbers          
12 Sine wave      
12 Word wheel        
11 Canny edge detector          
11 Canonicalize CIDR        
11 Gradient descent        
11 Line circle intersection      
11 Safe mode            
11 Simulated annealing        
11 Sorting algorithms/Tree sort on a linked list      
11 UPC          
11 VList        
10 ASCII art diagram converter        
10 Audio frequency generator            
10 Execute CopyPasta Language      
10 External sort        
10 Factorial base numbers indexing permutations of a collection        
10 Interactive Help        
10 Length of an arc between two angles          
10 Logistic Curve Fitting in Epidemiology      
10 Nimber arithmetic        
10 Penrose tiling    
10 Railway circuit      
10 Run as a daemon or service          
10 Sierpinski arrowhead curve        
10 Sierpinski curve        
10 Sierpinski square curve        
10 Spoof game      
10 Tetris            
9 Catmull–Clark subdivision surface            
9 Colour pinstripe/Printer        
9 Combinations with repetitions/Square Digit Chain        
9 Fibonacci matrix-exponentiation        
9 French Republican calendar        
9 Geohash          
9 Greed          
9 Launch rocket with countdown and acceleration in stdout        
9 Morpion solitaire        
9 Parse EBNF            
9 Pentomino tiling        
9 Pinstripe/Printer          
9 Resistance Calculator        
9 Starting a web browser        
9 Suffixation of decimal numbers        
9 Time-based One-time Password Algorithm            
8 Checksumcolor          
8 Faces from a mesh        
8 Minimal steps down to 1        
8 Numerical and alphabetical suffixes          
8 One-time pad      
8 Powerful numbers        
8 Unit testing            
8 User defined pipe and redirection operators          
8 Using a Speech engine to highlight words                
7 16 Puzzle Game            
7 Compiler/Verifying Syntax        
7 Curve that touches three points          
7 Display an outline as a nested table          
7 Fibonacci heap        
7 IPC via named pipe              
7 Long literals, with continuations            
7 Multidimensional Newton-Raphson method          
7 Quoting constructs            
7 Resistance Network Calculator        
7 Robots        
7 Rosetta Code/Rank languages by number of users          
7 Tree datastructures        
6 Elliptic Curve Digital Signature Algorithm          
6 Graph colouring          
6 Mayan calendar          
6 OpenGL Pixel Shader            
6 OpenGL/Utah Teapot            
6 Print itself              
6 Recursive descent parser generator            
6 Rosetta Code/Run examples                
6 Rosetta Code/Tasks without examples            
6 Text to HTML            
5 Addition-chain exponentiation            
5 Black Box              
5 Boids          
5 Continued fraction/Arithmetic/G(matrix NG, Contined Fraction N1, Contined Fraction N2)              
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 URL shortener              
5 XXXX redacted          
4 Audio Overlap Loop                
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 Tamagotchi emulator                  
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 Unicode polynomial equation              
3 Vidir                
3 Waveform analysis/Doh ray me              
2 15 Puzzle Game in 3D                  
2 CLI-based maze-game                  
2 IRC gateway                  
2 Waveform analysis/Top and tail                
1 Blackjack strategy                  
1 Create DWM statusbar                    
1 Ukkonen’s Suffix Tree Construction