Rosetta Code/Count examples/Full list

From Rosetta Code

Full output for the Rosetta Code/Count examples#Perl_6 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 Perl 6
④ Julia
⑤ Python
⑥ Kotlin
⑦ Perl
⑧ Racket
⑨ C
⑩ Zkl
As of 2019-09-16T02:05:14Z :: Tasks: 969 :: Draft Tasks:225 :: Total Tasks: 1194 :: Total Examples: 63596
Count Task
432 Hello world/Text
299 99 Bottles of Beer
288 100 doors
285 FizzBuzz
264 Fibonacci sequence
257 Factorial
254 Comments
241 A+B
230 Empty program
221 Function definition
210 Loops/Infinite
206 Loops/While
205 Ackermann function  
205 Reverse a string
204 Arrays
194 Loops/For
187 Conditional structures
183 Arithmetic/Integer
182 Greatest element of a list
176 Greatest common divisor
174 Array concatenation
174 Averages/Arithmetic mean
173 Integer comparison
172 Repeat a string
170 Boolean values
166 Increment a numerical string
166 Loops/Downward for
163 Even or odd
163 Hello world/Graphical
162 Loops/For with a specified step
160 Copy a string
156 Apply a callback to an array
153 Character codes
153 Hello world/Newline omission
153 Sum and product of an array
152 String length
151 Loops/Do-while
151 Loops/Foreach
150 Binary digits
150 Sieve of Eratosthenes
149 String concatenation
148 Loops/Break
148 Towers of Hanoi
147 Loops/N plus one half
147 Palindrome detection
147 Sum of a series
146 Generic swap
146 Integer sequence
145 String case
143 Dot product
143 Leap year
143 Logical operations
142 Array length
142 Rot-13
142 Sum of squares
142 Tokenize a string
141 Hailstone sequence
140 Filter
139 Empty string
138 Execute a system command
137 Associative array/Creation
137 Sort an integer array
133 Determine if a string is numeric
132 Caesar cipher
132 Higher-order functions
132 Quine
132 Sorting algorithms/Bubble sort
132 User input/Text
131 File input/output
131 Guess the number
130 Remove duplicate elements
129 Command-line arguments
128 Factors of an integer
128 Hello world/Standard error
128 Read entire file
127 Create a file
127 Roman numerals/Encode
127 System time
126 Bitwise operations
126 Primality by trial division
125 Day of the week
124 Sorting algorithms/Quicksort
122 Literals/String
122 Luhn test of credit card numbers
122 Stack
121 Check that file exists
121 Loop over multiple arrays simultaneously
121 Loops/Continue
121 Pascal's triangle
121 Sleep
121 Substring
120 Mutual recursion
118 Happy numbers
118 Least common multiple
117 Literals/Integer
116 Flatten a list
115 Include a file    
114 Balanced brackets
114 Binary search
114 Detect division by zero
114 Variables
113 Compound data type
113 Date format
113 Program termination
112 Associative array/Iteration
112 File size
112 Generate lower case ASCII alphabet
112 Knuth shuffle
112 Loops/Nested
111 Function composition
111 Read a file line by line
111 Real constants and functions
110 ABC Problem
110 Averages/Root mean square
110 Ethiopian multiplication
110 Formatted numeric output
110 Null object
110 Search a list
109 Classes  
109 Hostname  
109 Mandelbrot set
109 N-queens problem
108 Delete a file
108 Input loop
108 Rename a file
107 Averages/Median
107 Case-sensitivity of identifiers
107 Hash from two arrays
107 Multiplication tables
106 Count in octal
106 Environment variables
106 Guess the number/With feedback
106 Matrix multiplication
106 Matrix transposition
106 Zero to the zero power
105 HTTP
105 Pick random element
105 Return multiple values
104 Accumulator factory
104 Haversine formula
104 Identity matrix
104 Random numbers
104 Sorting algorithms/Insertion sort
103 Anagrams
103 Arithmetic/Complex
103 Count occurrences of a substring
103 Find limit of recursion
103 Perfect numbers
103 Roman numerals/Decode
102 Align columns
102 Assertions
102 Averages/Pythagorean means
102 Create a two-dimensional array at runtime
102 Pangram checker
102 String matching
101 Horner's rule for polynomial evaluation
100 Babbage problem
99 Arithmetic-geometric mean
99 Exceptions
99 Run-length encoding
98 Catalan numbers
98 Evaluate binomial coefficients
98 Infinity
98 Program name
98 Regular expressions
98 Temperature conversion
98 Variadic function
97 Combinations
97 Conway's Game of Life
97 Zig-zag matrix
96 Strip a set of characters from a string
96 Strip whitespace from a string/Top and tail
96 Substring/Top and tail
95 Letter frequency
95 Trigonometric functions
94 Anonymous recursion  
94 Short-circuit evaluation
94 String interpolation (included)
93 24 game
93 Levenshtein distance
93 Permutations
93 Prime decomposition
92 Comma quibbling
92 Reverse words in a string
92 Shell one-liner  
92 Sorting algorithms/Merge sort
92 Sorting algorithms/Selection sort
91 Collections
91 Enumerations
91 Nth root
91 Power set
91 Range extraction
90 First-class functions
90 Look-and-say sequence
90 Ordered words
90 Queue/Definition
89 Bulls and cows
89 Middle three digits
89 One-dimensional cellular automata
89 Range expansion
89 Sierpinski triangle
89 Y combinator
88 Exponentiation operator
88 Sequence of non-squares
87 Averages/Mode
87 Interactive programming    
87 Random number generator (included)
87 String append
87 Walk a directory/Non-recursively
86 Arbitrary-precision integers (included)
86 Call a function
86 Create an HTML table
86 Evolutionary algorithm
86 Sort using a custom comparator
85 Inheritance/Single  
85 MD5
85 Sorting algorithms/Gnome sort
85 String prepend
85 Sum multiples of 3 and 5
84 Cumulative standard deviation
84 Five weekends
84 Monty Hall problem
84 Time a function
84 Vector products
83 Averages/Simple moving average
83 Forward difference
83 Langton's ant
82 Digital root
82 Entropy
82 Hamming numbers
82 Sierpinski carpet
82 Symmetric difference
81 File modification time
81 Greatest subsequential sum
81 Harshad or Niven series
81 N'th
81 Sorting algorithms/Cocktail sort
81 Sum digits of an integer
81 Window creation  
80 Abstract type  
80 CSV data manipulation
80 CSV to HTML translation
80 Dragon curve
79 Execute Brain****
79 Price fraction
79 The Twelve Days of Christmas
78 Abundant, deficient and perfect number classifications
78 Hello world/Line printer  
78 JSON
78 Menu
78 Simple windowed application  
78 Sorting algorithms/Bogosort
78 Tree traversal
77 Catamorphism
77 Closures/Value capture
77 Introspection
77 Josephus problem
77 Literals/Floating point
77 Map range
77 Monte Carlo methods
77 Queue/Usage
77 SEDOLs
77 Web scraping
76 Box the compass
76 Floyd's triangle
76 Non-decimal radices/Convert
76 Set
76 Walk a directory/Recursively
75 Amicable pairs
75 Count in factors
75 Gray code
75 Last Friday of each month
75 Number reversal game
75 Sort an array of composite structures
75 Sorting algorithms/Heapsort
75 Spiral matrix
75 XML/Input
74 Number names  
74 Read a specific line from a file
74 Show the epoch
74 Singly-linked list/Traversal
74 Top rank per group
74 URL decoding
73 Bitmap
73 Knapsack problem/0-1
73 String comparison
73 Terminal control/Clear the screen
73 Terminal control/Ringing the terminal bell
72 Find common directory path
72 Playing cards
72 Sorting algorithms/Shell sort
71 Concurrent computing
71 Date manipulation
71 Dynamic variable names  
71 Hofstadter Q sequence
71 Keyboard input/Obtain a Y or N response  
71 Man or boy test  
71 Order two numerical lists
71 Roots of unity
71 Soundex  
71 Strip comments from a string
71 URL encoding
70 Address of a variable    
70 Almost prime
70 Fibonacci n-step number sequences
70 Kaprekar numbers
70 Linear congruential generator
70 Pythagorean triples
70 Sockets  
70 Special characters
69 Call an object method    
69 Count the coins
69 Exceptions/Catch an exception thrown in a nested call
69 Find the missing permutation
69 Jensen's Device
69 List comprehensions
69 Long multiplication
69 Lucas-Lehmer test
69 Proper divisors
69 Take notes on the command line
68 Averages/Mean angle
68 Bitmap/Bresenham's line algorithm
68 Compare a list of strings
68 Equilibrium index
68 Hello world/Newbie
68 Here document
68 Multifactorial
68 Non-decimal radices/Output
68 Pi
68 Polymorphism
68 Singly-linked list/Element definition
68 Sorting algorithms/Counting sort
68 Unicode variable names
67 CRC-32
67 Empty directory
67 Find the last Sunday of each month
67 Flow-control structures
67 Gamma function
67 Hello world/Web server  
67 Multiple distinct objects
67 Parsing/RPN calculator algorithm
67 Rock-paper-scissors  
67 Sorting algorithms/Comb sort
67 Stair-climbing puzzle
67 Sudoku
67 Word wrap
66 Anagrams/Deranged anagrams
66 Calendar
66 Convert seconds to compound duration
66 Longest common subsequence
66 Sorting algorithms/Stooge sort
66 Trabb Pardo–Knuth algorithm
66 Vigenère cipher
66 Write float arrays to a text file
65 Animation  
65 Execute HQ9+
65 IBAN
65 Modular inverse
65 Operator precedence
65 Semordnilap
64 Closest-pair problem
64 Enforced immutability
64 Four bit adder
64 Guess the number/With feedback (player)
64 Named parameters  
64 Numerical integration
64 Quaternion type
64 Read a configuration file
64 Sort disjoint sublist
63 Calculating the value of e
63 Call a foreign-language function  
63 Catalan numbers/Pascal's triangle
63 Euler method
63 Fork
63 Largest int from concatenated ints
63 Phrase reversals
63 Runtime evaluation    
62 AKS test for primes
62 Currying
62 HTTPS
62 Horizontal sundial calculations
62 Self-describing numbers
62 Sort stability
62 Text processing/Max licenses in use
62 Variable size/Get
62 Write entire file
62 Zeckendorf number representation
61 Arithmetic/Rational
61 Benford's law
61 Combinations with repetitions
61 Constrained random points on a circle
61 Draw a sphere
61 Magic squares of odd order
61 Maze generation
61 Munchausen numbers
61 One of n lines in a file
61 SHA-1
61 SHA-256
61 Special variables  
61 Strip control codes and extended characters from a string
61 Van der Corput sequence
60 Euler's sum of powers conjecture
60 Hofstadter-Conway $10,000 sequence
60 Inheritance/Multiple    
60 Morse code  
60 Optional parameters
60 Priority queue
60 Probabilistic choice
60 Repeat
60 Roots of a quadratic function
60 Singly-linked list/Element insertion
60 Split a character string based on change of character
60 XML/Output
59 Amb
59 Extend your language    
59 Fractal tree
59 Host introspection  
59 Jump anywhere
59 Memory allocation
59 Pernicious numbers
59 Remove lines from a file
59 Undefined values
58 Continued fraction
58 Documentation    
58 Narcissistic decimal number
58 Nested function
58 Roots of a function
58 Runge-Kutta method
58 Write language name in 3D ASCII
57 15 Puzzle Game  
57 Arithmetic evaluation
57 Chinese remainder theorem
57 Cholesky decomposition
57 Fast Fourier transform
57 Miller–Rabin primality test
57 Old lady swallowed a fly
57 Partial function application
57 Reduced row echelon form
57 Sorting algorithms/Pancake sort
56 24 game/Solve
56 Animate a pendulum  
56 Circles of given radius through two points
56 Globally replace text in several files
56 Knapsack problem/Unbounded
56 Non-decimal radices/Input
56 Population count
56 Sorting algorithms/Sleep sort
56 Stem-and-leaf plot
55 Factors of a Mersenne number
55 Forest fire    
55 Generator/Exponential
55 Huffman coding
55 Knapsack problem/Continuous
55 LZW compression
55 Rep-string
55 Test a function  
55 Unix/ls
54 Add a variable to a class instance at runtime      
54 Averages/Mean time of day
54 Binary strings  
54 Brownian tree
54 Deal cards for FreeCell
54 Draw a clock
54 General FizzBuzz
54 Get system command output
54 Mouse position  
54 Odd word problem
54 Plot coordinate pairs
54 Scope modifiers
54 Semiprime
54 Sequence of primes by trial division
54 Sorting algorithms/Bead sort
54 Tic-tac-toe  
54 XML/XPath    
53 Best shuffle
53 Compile-time calculation  
53 Define a primitive data type    
53 Delegates
53 Dinesman's multiple-dwelling problem
53 Extreme floating point values  
53 Knight's tour
53 Modular exponentiation
53 Runtime evaluation/In an environment    
53 Singleton  
53 Stack traces
53 Terminal control/Display an extended character
52 Angle difference between two bearings
52 Dutch national flag problem
52 Fibonacci word
52 Hash join  
52 I before E except after C
52 Matrix-exponentiation operator  
52 Munching squares
52 Pointers and references  
52 Random number generator (device)
52 Rosetta Code/Rank languages by popularity
52 Send email    
52 Sorting algorithms/Permutation sort
52 Synchronous concurrency
52 Thue-Morse
52 Truncate a file  
52 Two Sum
51 Bitmap/Write a PPM file
51 Draw a cuboid
51 Multisplit
51 Unicode strings
51 User input/Graphical  
51 Yin and yang
50 4-rings or 4-squares puzzle  
50 Dining philosophers
50 Doubly-linked list/Element definition
50 Emirp primes
50 Handle a signal
50 Inverted syntax
50 Modulinos      
50 Non-continuous subsequences
50 Statistics/Basic
50 Topological sort
50 Unbias a random generator
50 XML/DOM serialization  
49 9 billion names of God the integer
49 Barnsley fern
49 Integer overflow
49 JortSort
49 Maximum triangle path sum
49 Seven-sided dice from five-sided dice
49 Sierpinski triangle/Graphical
49 Sort three variables
49 Truncatable primes  
49 Wireworld    
48 Bernoulli numbers
48 Color of a screen pixel      
48 Exponentiation order
48 Grayscale image
48 Iterated digits squaring
48 Left factorials
48 Longest increasing subsequence
48 Ludic numbers
48 Mad Libs  
48 Quickselect algorithm
48 Respond to an unknown method call  
48 Terminal control/Cursor positioning  
48 Ternary logic  
47 Convert decimal number to rational
47 DNS query    
47 Department Numbers
47 First-class functions/Use numbers analogously  
47 Heronian triangles
47 Leonardo numbers
47 Text processing/2
47 Zebra puzzle
46 2048    
46 Extract file extension
46 FASTA format
46 Stable marriage problem
46 Stern-Brocot sequence
46 Text processing/1  
45 CUSIP
45 Discordian date
45 Doubly-linked list/Traversal  
45 Greyscale bars/Display
45 Keyboard input/Keypress check  
45 Move-to-front algorithm
45 Polymorphic copy  
45 Polynomial regression
45 Rate counter
45 Universal Turing machine
44 Call a function in a shared library    
44 Cartesian product of two or more lists
44 Dijkstra's algorithm
44 Echo server  
44 Make directory path
44 Pascal matrix generation
44 Rosetta Code/Count examples    
44 Search a list of records
44 Send an unknown method call  
44 Smith numbers
44 Strip block comments
44 Subleq
44 Validate International Securities Identification Number
43 Anti-primes
43 Base64 encode data
43 Determine if only one instance is running  
43 Doubly-linked list/Element insertion
43 Fractran
43 GUI component interaction    
43 Image noise  
43 Last letter-first letter
43 Metaprogramming
43 Parsing/Shunting-yard algorithm
43 Perfect shuffle
43 Pig the dice game  
43 Terminal control/Coloured text
43 Verify distribution uniformity/Naive
42 Bitmap/Read a PPM file
42 Execute a Markov algorithm
42 Extensible prime generator
42 History variables  
42 Hofstadter Figure-Figure sequences  
42 Holidays related to Easter  
42 Longest string challenge
42 Naming conventions
42 Polynomial long division
42 Sattolo cycle
41 Active object
41 Archimedean spiral
41 Atomic updates
41 Chinese zodiac
41 Determinant and permanent
41 Element-wise operations
41 Gaussian elimination
41 Longest common prefix
41 OpenGL    
41 Percentage difference between images
41 Set consolidation
41 Shoelace formula for polygonal area
41 Table creation/Postal addresses  
41 Twelve statements  
41 Variable size/Set
41 Visualize a tree
40 Append a record to the end of a text file
40 Bitmap/Flood fill  
40 Calendar - for "REAL" programmers  
40 Chaos game
40 Digital root/Multiplicative digital root
40 Doubly-linked list/Definition  
40 Farey sequence
40 Find the intersection of two lines
40 Generate Chess960 starting position
40 MD5/Implementation  
40 Narcissist
40 Password generator
40 Problem of Apollonius
40 Secure temporary file
40 Sparkline in unicode
40 Subtractive generator
40 Sum to 100
40 Tokenize a string with escaping
40 Vector
39 Average loop length
39 Colour bars/Display  
39 Jaro distance
39 Kronecker product
39 Parametric polymorphism      
39 Permutations/Derangements
39 Show Ascii table
39 Sorting algorithms/Strand sort
39 Ulam spiral (for primes)
38 GUI enabling/disabling of controls    
38 Hickerson series of almost integers
38 Knapsack problem/Bounded
38 Sorting algorithms/Radix sort
38 Terminal control/Dimensions
37 Bulls and cows/Player
37 Egyptian division
37 Elementary cellular automaton
37 GUI/Maximum window dimensions  
37 Inverted index  
37 Permutations by swapping
37 Start from a main routine  
37 Taxicab numbers
36 Cantor set
36 Combinations and permutations  
36 Constrained genericity        
36 Jewels and Stones
36 Keyboard input/Flush the keyboard buffer  
36 Knuth's algorithm S
36 Parallel calculations
36 Parsing/RPN to infix conversion
36 Pythagorean quadruples
36 QR decomposition  
36 Ray-casting algorithm
36 Self-referential sequence
36 Speech synthesis  
36 Statistics/Normal distribution
36 Text between
36 Topswops
36 Variable-length quantity
36 Voronoi diagram
36 Word frequency  
35 Aliquot sequence classifications
35 Bitmap/Midpoint circle algorithm    
35 Break OO privacy      
35 Carmichael 3 strong pseudoprimes
35 Deepcopy  
35 Events  
35 Function prototype  
35 LU decomposition
35 Object serialization  
35 Order disjoint list items  
35 Pascal's triangle/Puzzle
35 Permutations with repetitions  
35 S-Expressions  
35 Sailors, coconuts and a monkey problem
35 Vampire number
35 Water collected between towers
34 Balanced ternary    
34 Damm algorithm
34 Input/Output for Pairs of Numbers
34 Longest Common Substring
34 MD4  
34 Magic squares of doubly even order  
34 Metered concurrency
34 Minesweeper game    
34 Multiline shebang    
34 Pathological floating point problems
34 Permutation test
34 Terminal control/Unicode output
33 Colour pinstripe/Display  
33 Draw a pixel  
33 Find palindromic numbers in both binary and ternary bases
33 Flipping bits game  
33 Floyd-Warshall algorithm
33 Loops/Increment loop index within loop body
33 Musical scale    
33 Numerical integration/Gauss-Legendre Quadrature
33 Penney's game
33 Primorial numbers
33 Scope/Function names and labels
33 Spinning rod animation/Text
33 Terminal control/Hiding the cursor
33 Terminal control/Inverse video
33 Test integerness
32 Bitwise IO
32 Currency
32 Fibonacci word/fractal
32 Julia set
32 Ordered Partitions
32 Parametrized SQL statement  
32 Rosetta Code/Find bare lang tags    
32 Sorting Algorithms/Circle Sort
32 Square but not cube
31 Bitcoin/address validation
31 Bitmap/Bézier curves/Cubic  
31 Casting out nines  
31 Cramer's rule
31 Input/Output for Lines of Text
31 Maze solving
31 Pinstripe/Display  
31 RIPEMD-160  
31 RPG Attributes Generator
31 RSA code
31 Ranking methods
31 Straddling checkerboard
31 Subset sum problem
31 Sutherland-Hodgman polygon clipping    
31 Topic variable  
31 UTF-8 encode and decode
30 Arithmetic-geometric mean/Calculate Pi  
30 Bitmap/Histogram  
30 Brace expansion  
30 Create a file on magnetic tape    
30 File extension is in extensions list
30 Galton box animation  
30 Kernighans large earthquake problem
30 Lychrel numbers  
30 Metronome  
30 Prime conspiracy  
30 Pythagoras tree
30 Read a file character by character/UTF8
30 Recaman's sequence  
30 Resistor mesh
30 Simple database  
30 Solve a Hidato puzzle
30 Solve the no connection puzzle    
30 Truth table  
29 Bitmap/Bézier curves/Quadratic  
29 Check output device is a terminal  
29 Conjugate transpose  
29 Continued fraction/Arithmetic/Construct from rational number
29 Integer roots
29 Kahan summation  
29 Keyboard macros  
29 McNuggets Problem
29 Multiple regression  
29 Multiplicative order
29 Parse command-line arguments
29 Pattern matching      
29 Sort a list of object identifiers  
29 Write to Windows event log  
29 Zhang-Suen thinning algorithm  
28 Abbreviations, automatic    
28 Attractive numbers
28 Check Machin-like formulas    
28 Checkpoint synchronization
28 Cycle detection
28 Entropy/Narcissist
28 Executable library    
28 MAC Vendor Lookup
28 Memory layout of a data structure    
28 Negative base numbers
28 Rosetta Code/Find unimplemented tasks      
28 Set of real numbers
28 Terminal control/Preserve screen
28 Use another language to call a function      
28 Xiaolin Wu's line algorithm  
27 Abundant odd numbers
27 Chowla numbers  
27 Decimal floating point number to binary    
27 Deconvolution/1D
27 Display a linear combination
27 Egyptian fractions  
27 Execute SNUSP  
27 Find the intersection of a line with a plane
27 First class environments
27 Formal power series
27 Implicit type conversion
27 Numeric error propagation  
27 Partition an integer X into N primes  
27 Pentagram
27 Poker hand analyser  
27 Rosetta Code/Fix code tags    
27 Set puzzle
27 Terminal control/Cursor movement
27 The Name Game  
27 URL parser    
27 Verify distribution uniformity/Chi-squared test
26 Active Directory/Connect      
26 Arena storage pool  
26 Chat server  
26 Death Star    
26 Distributed programming      
26 FTP
26 Feigenbaum constant calculation
26 Find largest left truncatable prime in a given base
26 HTTPS/Authenticated
26 Hilbert curve
26 Idiomatically determine all the lowercase and uppercase letters  
26 Multi-dimensional array  
26 Nautical bell  
26 Paraffins
26 Pragmatic directives  
26 Reflection/List properties      
26 Safe addition  
26 Sort numbers lexicographically
26 Sorting algorithms/Cycle sort  
26 State name puzzle
26 Substitution Cipher
26 Table creation      
26 Update a configuration file  
26 Van Eck sequence  
26 Window creation/X11  
25 Check input device is a terminal  
25 Create an object at a given address      
25 Euler's identity
25 Find first and last set bit of a long integer
25 Fusc sequence
25 Go Fish    
25 Modular arithmetic
25 Natural sorting
25 Old Russian measure of length  
25 Reflection/List methods    
25 Same Fringe  
25 Sorting algorithms/Patience sort
25 Textonyms  
25 The ISAAC Cipher  
25 Totient function
24 Base64 decode data  
24 Copy stdin to stdout
24 Cuban primes  
24 Honeycombs    
24 Image convolution    
24 Magic 8-Ball
24 RCRPG    
24 Ramsey's theorem    
24 Solve a Holy Knight's tour    
24 Sum and Product Puzzle  
23 Bacon cipher
23 Card shuffles
23 Convex hull  
23 Decision tables  
23 Determine if two triangles overlap
23 Hough transform
23 Largest number divisible by its digits  
23 Make a backup file    
23 Mian-Chowla sequence    
23 Polyspiral  
23 Simulate input/Keyboard      
23 Square-free integers
23 Stream Merge    
23 Superellipse
23 Welch's t-test
22 AVL tree          
22 Abbreviations, simple  
22 Apply a digital filter (direct form II transposed)  
22 Cheryl's Birthday  
22 Compiler/lexical analyzer    
22 Dice game probabilities
22 Faulhaber's formula  
22 Function frequency    
22 K-means++ clustering    
22 Machine code      
22 Main step of GOST 28147-89
22 Nim Game  
22 Percolation/Mean run density
22 Perfect totient numbers
22 Permutations/Rank of a permutation
22 Plasma effect  
22 Play recorded sounds            
22 Sequence of primorial primes
22 Total circles area
22 Type detection  
22 World Cup group stage  
21 Base58Check encoding  
21 Birthday problem  
21 Cipolla's algorithm  
21 Cut a rectangle
21 Faulhaber's triangle
21 Idiomatically determine all the characters that can be used for symbols  
21 Koch curve
21 Linux CPU utilization
21 Nonoblock  
21 Parallel Brute Force
21 Pig the dice game/Player      
21 Record sound        
21 SOAP        
21 Safe primes and unsafe primes    
21 Superpermutation minimisation
21 Thiele's interpolation formula  
21 Tonelli-Shanks algorithm  
21 Video display modes      
21 Window management    
21 Word break problem  
20 Abbreviations, easy  
20 AudioAlarm        
20 Chaocipher  
20 Draw a rotating cube  
20 Elementary cellular automaton/Random Number Generator  
20 Generate random chess position  
20 Kronecker product based fractals  
20 Long primes
20 Loops/Wrong ranges
20 Loops/with multiple ranges  
20 Magic squares of singly even order  
20 Parse an IP Address  
20 Perlin noise
20 Playfair cipher      
20 Ramer-Douglas-Peucker line simplification  
20 Reverse the gender of a string    
20 Sokoban  
20 Solve a Numbrix puzzle  
20 Yahoo! search interface            
19 A* search algorithm    
19 Active Directory/Search for a user            
19 Brazilian numbers  
19 Church Numerals    
19 Create an object/Native demonstration  
19 Elliptic curve arithmetic  
19 Markov chain text generator    
19 Median filter  
19 Mersenne primes    
19 Sequence: smallest number greater than previous term with exactly n divisors    
19 Sierpinski pentagon  
19 Simulate input/Mouse      
19 Solve a Hopido puzzle  
18 Bilinear interpolation  
18 Chebyshev coefficients  
18 Deming's Funnel  
18 Diversity prediction theorem  
18 Lucky and even lucky numbers    
18 Mind boggling card trick    
18 Native shebang    
18 Strong and weak primes      
17 Addition chains
17 Assertions in design by contract      
17 Bitcoin/public point to address  
17 Color quantization    
17 Commatizing numbers    
17 Data Encryption Standard        
17 Eertree  
17 Four is magic  
17 Index finite lists of positive integers  
17 Joystick position              
17 Law of cosines - triples  
17 Levenshtein distance/Alignment  
17 N-body problem      
17 Percolation/Site percolation
17 Readline interface    
17 Reflection/Get source      
17 SQL-based authentication    
17 Selective File Copy      
17 Sequence: smallest number with exactly n divisors    
17 Shortest common supersequence
17 Snake And Ladder    
17 Untrusted environment    
16 Arithmetic coding/As a generalized change of radix    
16 Aspect Oriented Programming    
16 Burrows–Wheeler transform  
16 Chemical Calculator  
16 Eban numbers  
16 Elementary cellular automaton/Infinite length    
16 Find duplicate files      
16 First perfect square in base N with N unique digits      
16 HTTPS/Client-authenticated  
16 I.Q. Puzzle  
16 Just in time processing on a character stream
16 K-d tree  
16 Kolakoski sequence  
16 Kosaraju  
16 List rooted trees  
16 Montgomery reduction  
16 Orbital elements    
16 P-value correction  
16 Pell's equation    
16 Perceptron        
16 Sexy primes  
16 Vogel's approximation method  
16 Weird numbers      
15 Bell numbers  
15 Code segment unload        
15 Color wheel  
15 Compiler/code generator      
15 Factorions    
15 Finite state machine    
15 Fixed length records        
15 Free polyominoes enumeration        
15 Hunt The Wumpus        
15 Knuth's power tree  
15 Mastermind    
15 Monads/List monad      
15 Monads/Maybe monad          
15 NYSIIS  
15 Names to numbers    
15 Nonogram solver      
15 Percolation/Bond percolation
15 Percolation/Mean cluster density
15 Polynomial synthetic division    
15 Primes - allocate descendants to their ancestors
15 Range consolidation    
15 Rendezvous      
15 Retrieve and search chat history      
15 Self-hosting compiler        
15 Separate the house number from the street name    
15 Successive prime differences      
15 Sum data type        
15 Sunflower fractal    
15 Vigenère cipher/Cryptanalysis    
15 Zeckendorf arithmetic      
14 Bitmap/Read an image through a pipe    
14 Compiler/virtual machine interpreter      
14 EKG sequence convergence  
14 Find URI in text          
14 Gauss-Jordan matrix inversion    
14 Most frequent k chars distance      
14 Nested templated data    
14 Numeric separator syntax    
14 Spelling of ordinal numbers    
14 Terminal control/Positional read    
14 Vibrating rectangles    
13 Compare sorting algorithms' performance        
13 Compiler/syntax analyzer        
13 Draw pixel 2    
13 Imaginary base numbers        
13 Matrix chain multiplication    
13 Mayan numerals      
13 Numerical integration/Adaptive Simpson's method  
13 Particle Swarm Optimization          
13 Proof                
13 Smarandache prime-digital sequence        
13 Teacup rim text        
13 Transportation problem        
13 Word search      
12 Bitmap/PPM conversion through a pipe    
12 Compiler/AST interpreter      
12 Deconvolution/2D+      
12 File size distribution
12 Peano curve    
12 Permutations with some identical elements        
12 Random Latin Squares        
12 Snake          
12 Suffix tree      
12 Topological sort/Extracted top item    
12 XML Validation          
11 Approximate Equality    
11 Chernick's Carmichael numbers      
11 Continued fraction/Arithmetic/G(matrix NG, Contined Fraction N)      
11 Fermat numbers    
11 Monads/Writer monad            
11 OpenWebNet Password      
11 Singly-linked list/Element removal        
11 Zumkeller numbers    
10 15 puzzle solver          
10 Angles (geometric), normalization and conversion    
10 Generalised floating point addition          
10 Geometric algebra          
10 Humble numbers      
10 Interactive Help        
10 N-smooth numbers        
10 Penrose tiling      
10 Print debugging statement      
10 Sequence: nth number with exactly n divisors      
10 Stirling numbers of the first kind        
10 Stirling numbers of the second kind        
10 Tarjan    
10 VList          
9 ASCII art diagram converter          
9 Banker's algorithm        
9 Canny edge detector            
9 Combinations with repetitions/Square Digit Chain      
9 De Bruijn sequences    
9 Fraction reduction        
9 Lah numbers        
9 Parse EBNF            
9 Pierpont primes        
9 Run as a daemon or service            
9 Safe mode            
9 Suffixation of decimal numbers      
8 21 Game        
8 Audio frequency generator                
8 Checksumcolor        
8 Four is the number of letters in the ...      
8 French Republican calendar          
8 Latin Squares in reduced form          
8 Launch rocket with countdown and acceleration in stdout        
8 Morpion solitaire            
8 Numerical and alphabetical suffixes        
8 Peaceful chess queen armies      
8 Pentomino tiling          
8 Ramanujan's constant          
8 Resistance Calculator        
8 Simulated annealing            
8 Sine wave          
8 Sorting algorithms/Tree sort on a linked list          
8 Starting a web browser          
8 Time-based One-time Password Algorithm            
8 Unit testing          
7 Catmull–Clark subdivision surface                
7 Colour pinstripe/Printer            
7 Curve that touches three points        
7 External sort          
7 Factorial base numbers indexing permutations of a collection          
7 Greed            
7 IPC via named pipe            
7 Multidimensional Newton-Raphson method        
7 One-time pad        
7 Pinstripe/Printer              
7 Railway circuit          
7 Resistance Network Calculator      
7 Rosetta Code/Rank languages by number of users        
7 Spoof game          
7 Tetris                  
7 User defined pipe and redirection operators            
7 Using a Speech engine to highlight words                  
6 16 Puzzle Game              
6 Matrix Digital Rain          
6 OpenGL Pixel Shader            
6 OpenGL/Utah Teapot            
6 Robots            
6 Rosetta Code/Tasks without examples          
5 Addition-chain exponentiation            
5 Continued fraction/Arithmetic/G(matrix NG, Contined Fraction N1, Contined Fraction N2)              
5 Fibonacci heap            
5 Functional coverage tree            
5 Gradient descent            
5 Hexapawn              
5 Mayan calendar          
5 Remote agent/Agent interface              
5 Remote agent/Agent logic              
5 Remote agent/Simulation              
5 Rosetta Code/Run examples                  
5 Text to HTML              
4 Abelian sandpile model              
4 Boids              
4 Chess player              
4 Elliptic Curve Digital Signature Algorithm              
4 OLE Automation                
4 Terminal control/Restricted width positional input/No wrapping            
4 Terminal control/Restricted width positional input/With wrapping            
4 Using the Meetup.com API                
3 Audio Overlap Loop                  
3 Generalised floating point multiplication                
3 I'm a software engineer, get me out of here                
3 Latin Squares in reduced form/Randomizing using Jacobson and Matthews’ Technique                
3 Process SMIL directives in XML data                
3 Rare numbers                
3 Solve a Rubik's Cube              
3 Tamagotchi emulator                    
2 Raster bars                
2 Recursive descent parser generator                    
2 Unicode polynomial equation                
1 15 Puzzle Game in 3D                    
1 Black Box                    
1 IRC gateway                    
1 Rosetta Code/List authors of task descriptions                  
1 Solving coin problems                  
1 Ukkonen’s Suffix Tree Construction                  
1 Waveform analysis/Doh ray me                  
1 Waveform analysis/Top and tail                  
0 Blackjack strategy                    
0 Chess player/Move generation                    
0 Chess player/Program options and user interface                    
0 Chess player/Search and evaluation                    
0 Rosetta Code/Tasks sorted by average lines of code                    
0 Weather Routing