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 Perl 6
③ Kotlin
④ Python
⑤ Perl
⑥ Phix
⑦ Julia
⑧ Racket
⑨ C
⑩ J
As of 2019-04-14T18:44:02Z :: Tasks: 932 :: Draft Tasks:227 :: Total Tasks: 1159 :: Total Examples: 61348
Count Task
413 Hello world/Text
288 99 Bottles of Beer
278 100 doors
278 FizzBuzz
255 Fibonacci sequence
249 Comments
247 Factorial
228 A+B
224 Empty program
216 Function definition
203 Loops/Infinite
201 Ackermann function
199 Reverse a string
196 Loops/While
193 Arrays
185 Loops/For
182 Conditional structures
181 Greatest common divisor
180 Greatest element of a list
177 Arithmetic/Integer
172 Averages/Arithmetic mean
171 Integer comparison
168 Array concatenation
168 Repeat a string
166 Boolean values
164 Increment a numerical string
164 Loops/Downward for
158 Loops/For with a specified step
157 Copy a string
157 Hello world/Graphical
156 Even or odd
152 Apply a callback to an array
152 Sum and product of an array
151 String length
150 Loops/Foreach
149 Character codes
149 Loops/Do-while
146 Hello world/Newline omission
145 Loops/Break
145 String case
144 Integer sequence
144 Loops/N plus one half
144 Palindrome detection
144 String concatenation
144 Sum of a series
144 Towers of Hanoi
143 Generic swap
143 Sieve of Eratosthenes
141 Binary digits
141 Hailstone sequence
141 Sum of squares
139 Filter
139 Leap year
139 Logical operations
139 Rot-13
139 Tokenize a string
138 Dot product
137 Sort an integer array
136 Execute a system command
134 Array length
134 Associative array/Creation
130 File input/output
130 Higher-order functions
129 Determine if a string is numeric
129 Empty string
129 Quine
129 Remove duplicate elements
128 User input/Text
127 Command-line arguments
127 Read entire file
127 Sorting algorithms/Bubble sort
126 Bitwise operations
126 Caesar cipher
126 Create a file
126 Factors of an integer
125 Roman numerals/Encode
124 Hello world/Standard error
124 Primality by trial division
124 System time
123 Guess the number
121 Day of the week
121 Sorting algorithms/Quicksort
120 Check that file exists
120 Mutual recursion
120 Pascal's triangle
119 Literals/String
119 Loops/Continue
119 Luhn test of credit card numbers
119 Stack
118 Sleep
118 Substring
117 Happy numbers
117 Least common multiple
117 Literals/Integer
117 Loop over multiple arrays simultaneously
114 Balanced brackets
114 Detect division by zero
114 Flatten a list
114 Include a file    
113 Date format
113 Knuth shuffle
113 Program termination
112 Real constants and functions
112 Variables
111 Associative array/Iteration
110 Averages/Root mean square
110 Compound data type
110 Ethiopian multiplication
110 File size
110 Read a file line by line
110 Search a list
109 Formatted numeric output
109 Null object
108 ABC Problem
108 Anagrams  
108 Binary search
108 Classes  
108 Hostname    
108 Loops/Nested
107 Averages/Median
107 Case-sensitivity of identifiers
107 Function composition
107 Generate lower case ASCII alphabet
107 Rename a file
106 Environment variables
106 Input loop
106 N-queens problem
105 Count in octal
105 Delete a file
105 Hash from two arrays
105 Mandelbrot set
105 Matrix transposition
105 Multiplication tables
104 Identity matrix
104 Return multiple values
103 Arithmetic/Complex
103 HTTP
103 Matrix multiplication
103 Random numbers
103 Sorting algorithms/Insertion sort
102 Averages/Pythagorean means
102 Guess the number/With feedback
102 Pangram checker
102 Pick random element
102 Zero to the zero power
101 Accumulator factory
101 Assertions
101 Count occurrences of a substring
101 Find limit of recursion
101 Haversine formula
101 Perfect numbers
100 Create a two-dimensional array at runtime
100 Horner's rule for polynomial evaluation
100 String matching  
99 Align columns
99 Roman numerals/Decode
98 Catalan numbers
97 Evaluate binomial coefficients
97 Program name
96 Arithmetic-geometric mean
96 Combinations
96 Run-length encoding
96 Strip a set of characters from a string
96 Strip whitespace from a string/Top and tail
96 Substring/Top and tail
96 Temperature conversion
96 Zig-zag matrix
95 Exceptions
95 Infinity
95 Regular expressions
95 Trigonometric functions
94 Anonymous recursion  
94 Letter frequency
94 Variadic function
93 Babbage problem
93 Conway's Game of Life
93 Prime decomposition
93 String interpolation (included)
92 Short-circuit evaluation
91 24 game
91 Comma quibbling
91 Power set
91 Shell one-liner  
91 Sorting algorithms/Selection sort
90 Collections
90 Sorting algorithms/Merge sort
89 Averages/Mode
89 Enumerations
89 Levenshtein distance
89 Look-and-say sequence
89 Middle three digits
89 Permutations
89 Range extraction
89 Reverse words in a string
89 Sierpinski triangle
89 Sum multiples of 3 and 5
88 First-class functions
88 Inheritance/Single  
88 Nth root
88 One-dimensional cellular automata
88 Ordered words
88 Queue/Definition
88 Random number generator (included)
88 Sequence of non-squares
87 Exponentiation operator
86 Arbitrary-precision integers (included)
86 Interactive programming    
86 Range expansion
86 Walk a directory/Non-recursively
86 Y combinator
85 MD5
85 Sort using a custom comparator
85 Sorting algorithms/Gnome sort
84 Bulls and cows
84 Create an HTML table
84 Cumulative standard deviation
84 Evolutionary algorithm
84 String prepend
83 Call a function
83 Five weekends
83 Monty Hall problem
83 String append
83 Time a function
83 Vector products
82 Averages/Simple moving average
82 Forward difference
82 Symmetric difference
81 Abstract type  
81 Digital root
81 Sum digits of an integer
80 Hamming numbers
80 Sierpinski carpet
80 Window creation
79 Dragon curve
79 Entropy
79 File modification time  
79 Greatest subsequential sum
79 Harshad or Niven series
79 N'th
79 Sorting algorithms/Cocktail sort
78 Execute Brain****
78 Langton's ant
78 Price fraction
78 Sorting algorithms/Bogosort
77 CSV data manipulation
77 JSON
77 Map range
77 Menu
77 Queue/Usage
77 Simple windowed application
76 CSV to HTML translation
76 Hello world/Line printer
76 Introspection  
76 Literals/Floating point
76 Non-decimal radices/Convert
76 SEDOLs
76 The Twelve Days of Christmas
76 Tree traversal
75 Box the compass
75 Catamorphism
75 Closures/Value capture
75 Floyd's triangle
75 Gray code
75 Last Friday of each month
75 Man or boy test
75 Monte Carlo methods
75 Set
75 Sort an array of composite structures
75 Web scraping  
74 Abundant, deficient and perfect number classifications
74 Count in factors
74 Number reversal game
74 Show the epoch
74 Spiral matrix
74 Walk a directory/Recursively
73 Amicable pairs
73 Bitmap
73 Josephus problem
73 Read a specific line from a file
73 Sorting algorithms/Heapsort
73 Top rank per group
73 URL decoding
73 XML/Input  
72 Knapsack problem/0-1
72 Number names    
72 Singly-linked list/Traversal
72 Sorting algorithms/Shell sort
72 String comparison
72 Terminal control/Ringing the terminal bell
71 Concurrent computing
71 Dynamic variable names  
71 Find common directory path
71 Playing cards
70 Address of a variable    
70 Linear congruential generator
70 List comprehensions
70 Order two numerical lists
70 Roots of unity
70 Soundex
70 Special characters
70 Terminal control/Clear the screen
69 Date manipulation
69 Fibonacci n-step number sequences
69 Find the missing permutation
69 Kaprekar numbers
69 Long multiplication
69 Strip comments from a string
69 Take notes on the command line
69 URL encoding
68 Count the coins
68 Hello world/Newbie
68 Jensen's Device
68 Non-decimal radices/Output
68 Polymorphism
68 Pythagorean triples
68 Sockets  
67 CRC-32
67 Compare a list of strings
67 Equilibrium index
67 Find the last Sunday of each month
67 Lucas-Lehmer test
67 Multiple distinct objects
67 Singly-linked list/Element definition
67 Sorting algorithms/Comb sort
67 Sorting algorithms/Counting sort
67 Unicode variable names
67 Word wrap
66 Almost prime
66 Averages/Mean angle
66 Call an object method    
66 Empty directory
66 Flow-control structures
66 Here document
66 Hofstadter Q sequence
66 Keyboard input/Obtain a Y or N response  
66 Longest common subsequence
66 Multifactorial
66 Parsing/RPN calculator algorithm
66 Pi
66 Sorting algorithms/Stooge sort
66 Stair-climbing puzzle
66 Sudoku
66 Trabb Pardo–Knuth algorithm
66 Vigenère cipher
66 Write float arrays to a text file
65 Anagrams/Deranged anagrams
65 Bitmap/Bresenham's line algorithm
65 Convert seconds to compound duration
65 Exceptions/Catch an exception thrown in a nested call
65 Hello world/Web server  
65 Modular inverse
65 Proper divisors
65 Semordnilap
65 Text processing/Max licenses in use  
64 Gamma function
64 IBAN
64 Sort disjoint sublist
63 Animation  
63 Catalan numbers/Pascal's triangle
63 Enforced immutability
63 Guess the number/With feedback (player)
63 Largest int from concatenated ints
63 Numerical integration
63 Operator precedence
63 Read a configuration file
62 AKS test for primes
62 Call a foreign-language function  
62 Closest-pair problem
62 Four bit adder
62 HTTPS
62 Jump anywhere
62 Named parameters
62 Quaternion type
62 Rock-paper-scissors
62 Runtime evaluation    
62 Self-describing numbers
62 Sort stability
62 Special variables
62 Zeckendorf number representation
61 Arithmetic/Rational
61 Calendar
61 Constrained random points on a circle
61 Draw a sphere
61 Euler method
61 Fork
61 Horizontal sundial calculations
61 Strip control codes and extended characters from a string
61 Van der Corput sequence
60 Benford's law
60 Currying
60 Execute HQ9+
60 Hofstadter-Conway $10,000 sequence
60 Magic squares of odd order
60 Phrase reversals
60 Probabilistic choice
60 Roots of a quadratic function
60 Variable size/Get
59 Amb
59 Extend your language  
59 Host introspection
59 Inheritance/Multiple    
59 One of n lines in a file
59 Optional parameters
59 Priority queue
59 Remove lines from a file
59 SHA-1
59 Singly-linked list/Element insertion
59 Undefined values
59 Yin and yang
58 Combinations with repetitions
58 Fractal tree
58 Maze generation
58 Memory allocation
58 Munchausen numbers
58 Roots of a function
58 Runge-Kutta method
58 SHA-256
58 Write entire file
58 XML/Output
57 Euler's sum of powers conjecture
57 Fast Fourier transform
57 Miller–Rabin primality test
57 Narcissistic decimal number
57 Sorting algorithms/Pancake sort
57 Split a character string based on change of character
56 24 game/Solve
56 Animate a pendulum
56 Best shuffle
56 Cholesky decomposition
56 Documentation  
56 Globally replace text in several files
56 Knapsack problem/Unbounded
56 Non-decimal radices/Input
56 Partial function application
56 Pernicious numbers
56 Repeat
56 Write language name in 3D ASCII
55 Circles of given radius through two points
55 Continued fraction
55 Factors of a Mersenne number
55 Huffman coding
55 LZW compression
55 Morse code
55 Old lady swallowed a fly
55 Reduced row echelon form
55 Sorting algorithms/Sleep sort  
55 Stem-and-leaf plot
55 Test a function  
54 Add a variable to a class instance at runtime      
54 Averages/Mean time of day
54 Brownian tree
54 Chinese remainder theorem
54 Knapsack problem/Continuous
54 Odd word problem
54 Plot coordinate pairs
54 Rosetta Code/Rank languages by popularity    
54 Sequence of primes by trial division
54 Sorting algorithms/Bead sort
54 Unix/ls
53 Arithmetic evaluation
53 Binary strings  
53 DNS query      
53 Deal cards for FreeCell
53 Extreme floating point values
53 Forest fire  
53 Generator/Exponential
53 Semiprime
53 Singleton  
53 Stack traces
53 XML/XPath    
52 Bitmap/Write a PPM file
52 Calculating the value of e
52 Delegates
52 Dinesman's multiple-dwelling problem
52 Draw a clock
52 Fibonacci word
52 Hash join  
52 Modular exponentiation
52 Mouse position  
52 Pointers and references  
52 Random number generator (device)
52 Rep-string
52 Runtime evaluation/In an environment    
52 Scope modifiers
52 Send email    
52 Sorting algorithms/Permutation sort
52 Synchronous concurrency
52 Tic-tac-toe
52 Truncate a file
51 Compile-time calculation  
51 Dutch national flag problem
51 Knight's tour
51 Nested function
51 Terminal control/Display an extended character
51 User input/Graphical
50 15 Puzzle Game
50 General FizzBuzz
50 Handle a signal  
50 I before E except after C
50 Matrix-exponentiation operator
50 Multisplit
50 Munching squares
50 Non-continuous subsequences
50 Statistics/Basic
49 Define a primitive data type    
49 Dining philosophers
49 Draw a cuboid
49 Emirp primes
49 Maximum triangle path sum
49 Population count
49 Seven-sided dice from five-sided dice
49 Topological sort
49 Truncatable primes    
49 Unbias a random generator
49 Unicode strings
49 Wireworld  
48 9 billion names of God the integer
48 Doubly-linked list/Element definition
48 Grayscale image
48 Integer overflow
48 Left factorials
48 Modulinos      
48 Quickselect algorithm
48 Respond to an unknown method call  
48 Sierpinski triangle/Graphical
48 Ternary logic
48 Thue-Morse
48 Two Sum
48 XML/DOM serialization  
47 Color of a screen pixel      
47 Exponentiation order
47 Get system command output  
47 Heronian triangles
47 Inverted syntax  
47 Iterated digits squaring
47 JortSort
47 Mad Libs  
47 Table creation/Postal addresses  
47 Text processing/2
46 Barnsley fern
46 Convert decimal number to rational
46 First-class functions/Use numbers analogously  
46 Ludic numbers
46 Sort three variables
46 Stable marriage problem
46 Stern-Brocot sequence
46 Terminal control/Cursor positioning  
46 Text processing/1
46 Zebra puzzle
45 Angle difference between two bearings
45 Department Numbers
45 Discordian date
45 Longest increasing subsequence
45 Move-to-front algorithm
45 Polymorphic copy
45 Universal Turing machine
44 4-rings or 4-squares puzzle  
44 Bernoulli numbers
44 Call a function in a shared library    
44 Echo server    
44 Extract file extension
44 FASTA format  
44 Greyscale bars/Display
44 Polynomial regression
44 Rate counter
44 Search a list of records
44 Send an unknown method call  
44 Strip block comments
44 Subleq
44 Terminal control/Coloured text
43 Doubly-linked list/Element insertion
43 Doubly-linked list/Traversal  
43 Fractran
43 GUI component interaction  
43 Hofstadter Figure-Figure sequences  
43 Keyboard input/Keypress check  
43 Make directory path
43 Metaprogramming
43 Rosetta Code/Count examples      
42 Bitmap/Read a PPM file
42 Determine if only one instance is running  
42 Extensible prime generator
42 History variables  
42 Holidays related to Easter
42 Last letter-first letter
42 Leonardo numbers
42 Longest string challenge
42 OpenGL  
42 Parsing/Shunting-yard algorithm
42 Pascal matrix generation
42 Perfect shuffle
42 Polynomial long division
42 Smith numbers
42 Validate International Securities Identification Number
42 Verify distribution uniformity/Naive
41 2048    
41 CUSIP
41 Cartesian product of two or more lists
41 Dijkstra's algorithm
41 Execute a Markov algorithm
41 Image noise
41 Sattolo cycle
41 Set consolidation
40 Archimedean spiral
40 Atomic updates  
40 Element-wise operations
40 Farey sequence
40 Gaussian elimination
40 Narcissist
40 Percentage difference between images
40 Problem of Apollonius
40 Sparkline in unicode
40 Subtractive generator
40 Twelve statements  
40 Variable size/Set
40 Visualize a tree
39 Active object  
39 Append a record to the end of a text file
39 Average loop length
39 Base64 encode data
39 Bitmap/Flood fill  
39 Bitmap/Midpoint circle algorithm    
39 Colour bars/Display
39 Determinant and permanent
39 Digital root/Multiplicative digital root
39 Doubly-linked list/Definition  
39 Find the intersection of two lines
39 MD5/Implementation
39 Pig the dice game  
39 Secure temporary file    
39 Shoelace formula for polygonal area
39 Sorting algorithms/Strand sort
38 Calendar - for "REAL" programmers    
38 GUI enabling/disabling of controls  
38 Knapsack problem/Bounded
38 Kronecker product
38 Naming conventions
38 Parametric polymorphism    
38 Password generator  
38 Sum to 100
38 Terminal control/Dimensions
38 Tokenize a string with escaping
37 Bulls and cows/Player
37 Chinese zodiac
37 GUI/Maximum window dimensions  
37 Inverted index
37 Longest common prefix
37 Permutations by swapping
37 Permutations/Derangements
37 Vector
36 Egyptian division
36 Generate Chess960 starting position
36 Hickerson series of almost integers
36 Jaro distance  
36 Keyboard input/Flush the keyboard buffer  
36 Knuth's algorithm S
36 Ray-casting algorithm
36 Sorting algorithms/Radix sort
36 Statistics/Normal distribution
36 Taxicab numbers
36 Topswops
36 Ulam spiral (for primes)
36 Variable-length quantity
35 Aliquot sequence classifications
35 Carmichael 3 strong pseudoprimes
35 Chaos game  
35 Combinations and permutations
35 Constrained genericity        
35 Deepcopy
35 Object serialization  
35 Order disjoint list items  
35 Parallel calculations  
35 Pascal's triangle/Puzzle
35 Sailors, coconuts and a monkey problem
35 Self-referential sequence
35 Speech synthesis    
35 Vampire number
35 Voronoi diagram
34 Balanced ternary  
34 Break OO privacy      
34 Elementary cellular automaton
34 Events    
34 LU decomposition
34 Metered concurrency  
34 Parsing/RPN to infix conversion
34 Permutations with repetitions
34 S-Expressions
34 Start from a main routine  
33 Colour pinstripe/Display
33 Function prototype  
33 Longest Common Substring
33 MD4
33 Minesweeper game  
33 Multiline shebang      
33 Permutation test
33 Pythagorean quadruples
33 QR decomposition    
33 Terminal control/Hiding the cursor
33 Terminal control/Inverse video
33 Test integerness
33 Water collected between towers
32 Fibonacci word/fractal
32 Find palindromic numbers in both binary and ternary bases
32 Floyd-Warshall algorithm
32 Input/Output for Pairs of Numbers  
32 Jewels and Stones
32 Numerical integration/Gauss-Legendre Quadrature
32 Scope/Function names and labels  
32 Sorting Algorithms/Circle Sort
32 Terminal control/Unicode output  
32 Text between
31 Bitmap/Bézier curves/Cubic  
31 Casting out nines  
31 Flipping bits game
31 Julia set
31 Musical scale    
31 Ordered Partitions
31 Pathological floating point problems
31 Penney's game
31 Pinstripe/Display
31 Primorial numbers
31 Ranking methods
31 Topic variable  
31 Word count    
30 Bitcoin/address validation  
30 Bitmap/Histogram  
30 Bitwise IO  
30 File extension is in extensions list
30 Input/Output for Lines of Text
30 Lychrel numbers  
30 Magic squares of doubly even order    
30 Maze solving
30 Parametrized SQL statement  
30 RIPEMD-160    
30 Read a file character by character/UTF8
30 Resistor mesh
30 Rosetta Code/Find unimplemented tasks        
30 Simple database
30 Subset sum problem  
30 Sutherland-Hodgman polygon clipping    
30 Truth table
30 UTF-8 encode and decode
29 Anti-primes  
29 Arithmetic-geometric mean/Calculate Pi
29 Bitmap/Bézier curves/Quadratic  
29 Conjugate transpose
29 Create a file on magnetic tape      
29 Keyboard macros    
29 Loops/Increment loop index within loop body  
29 Metronome
29 Multiple regression  
29 Multiplicative order
29 Parse command-line arguments
29 RSA code
29 Show Ascii table  
29 Xiaolin Wu's line algorithm
29 Zhang-Suen thinning algorithm
28 Brace expansion  
28 Cantor set  
28 Continued fraction/Arithmetic/Construct from rational number
28 Currency
28 Damm algorithm
28 Entropy/Narcissist
28 Executable library    
28 Integer roots
28 Kernighans large earthquake problem
28 Pattern matching      
28 Prime conspiracy    
28 Solve a Hidato puzzle  
28 Sort a list of object identifiers  
28 Terminal control/Preserve screen  
28 Use another language to call a function      
27 Check Machin-like formulas  
27 Check output device is a terminal  
27 Checkpoint synchronization  
27 First class environments
27 Formal power series
27 Galton box animation  
27 Kahan summation  
27 Memory layout of a data structure  
27 Numeric error propagation
27 Set of real numbers
27 Set puzzle
27 Solve the no connection puzzle    
27 Square but not cube
27 Straddling checkerboard  
27 Stream Merge    
27 Write to Windows event log      
26 Abbreviations, automatic    
26 Cramer's rule
26 Cycle detection
26 Deconvolution/1D
26 Distributed programming      
26 Egyptian fractions  
26 Execute SNUSP
26 Find largest left truncatable prime in a given base
26 Fivenum
26 HTTPS/Authenticated  
26 Implicit type conversion  
26 Multi-dimensional array
26 Nautical bell
26 Negative base numbers
26 Paraffins
26 Partition an integer X into N primes  
26 Pentagram
26 Pragmatic directives
26 Pythagoras tree  
26 Recaman's sequence  
26 Rosetta Code/Fix code tags      
26 Safe addition
26 Sorting algorithms/Cycle sort
26 State name puzzle
26 Substitution Cipher
26 Table creation    
26 Terminal control/Cursor movement  
26 The Name Game    
26 URL parser  
26 Update a configuration file
25 Active Directory/Connect        
25 Arena storage pool  
25 Death Star  
25 Decimal floating point number to binary      
25 FTP  
25 Find first and last set bit of a long integer
25 Find the intersection of a line with a plane  
25 MAC Vendor Lookup  
25 Natural sorting
25 Reflection/List methods    
25 Rosetta Code/Find bare lang tags          
25 Same Fringe  
25 Textonyms  
25 The ISAAC Cipher  
25 Verify distribution uniformity/Chi-squared test
24 Chat server    
24 Check input device is a terminal    
24 Create an object at a given address      
24 Draw a pixel  
24 Go Fish  
24 Modular arithmetic    
24 Poker hand analyser
24 RPG Attributes Generator  
24 Reflection/List properties      
24 Sorting algorithms/Patience sort  
24 Type detection    
23 Euler's identity
23 Faulhaber's formula  
23 Honeycombs    
23 Hough transform
23 Image convolution    
23 Old Russian measure of length
23 Polyspiral  
23 Ramsey's theorem  
23 Simulate input/Keyboard      
23 Solve a Holy Knight's tour  
23 Sum and Product Puzzle    
23 Superellipse
23 Window creation/X11    
22 Card shuffles
22 Decision tables  
22 Display a linear combination
22 Feigenbaum constant calculation    
22 Function frequency  
22 Idiomatically determine all the lowercase and uppercase letters  
22 K-means++ clustering  
22 Mian-Chowla sequence    
22 Percolation/Mean run density
22 Permutations/Rank of a permutation
22 Plasma effect
22 RCRPG    
22 Spinning rod animation/Text    
22 Square-free integers
22 Total circles area
22 Welch's t-test
21 AVL tree          
21 Bacon cipher
21 Birthday problem  
21 Compiler/lexical analyzer    
21 Cut a rectangle
21 Dice game probabilities
21 Faulhaber's triangle  
21 Make a backup file      
21 Nonoblock  
21 Pig the dice game/Player    
21 Play recorded sounds              
21 SOAP        
21 Sequence of primorial primes
21 Thiele's interpolation formula  
21 Window management    
21 World Cup group stage  
20 Apply a digital filter (direct form II transposed)    
20 Determine if two triangles overlap  
20 Hilbert curve    
20 Kronecker product based fractals  
20 Magic 8-Ball    
20 Main step of GOST 28147-89    
20 McNuggets Problem  
20 Playfair cipher      
20 Record sound        
20 Safe primes and unsafe primes    
20 Superpermutation minimisation
20 Tonelli-Shanks algorithm  
20 Video display modes        
20 Yahoo! search interface            
19 AudioAlarm            
19 Draw a rotating cube  
19 Elliptic curve arithmetic
19 Fusc sequence      
19 Idiomatically determine all the characters that can be used for symbols    
19 Largest number divisible by its digits  
19 Long primes
19 Machine code        
19 Median filter  
19 Parallel Brute Force    
19 Parse an IP Address  
19 Simulate input/Mouse      
19 Sokoban  
19 Solve a Numbrix puzzle    
19 Totient function  
18 Abbreviations, simple  
18 Active Directory/Search for a user              
18 Chebyshev coefficients  
18 Cipolla's algorithm    
18 Convex hull      
18 Create an object/Native demonstration    
18 Generate random chess position  
18 Linux CPU utilization  
18 Lucky and even lucky numbers    
18 Magic squares of singly even order    
18 Perlin noise  
18 Ramer-Douglas-Peucker line simplification  
18 Reverse the gender of a string    
18 Sierpinski pentagon    
18 Sort numbers lexicographically        
18 Word break problem    
17 A* search algorithm      
17 Bilinear interpolation  
17 Color quantization  
17 Commatizing numbers  
17 Deming's Funnel    
17 Diversity prediction theorem    
17 Elementary cellular automaton/Random Number Generator    
17 Joystick position              
17 Levenshtein distance/Alignment    
17 Markov chain text generator    
17 Mind boggling card trick    
17 Perfect totient numbers  
17 Readline interface    
17 Reflection/Get source      
17 SQL-based authentication    
17 Shortest common supersequence  
17 Solve a Hopido puzzle      
16 Base58Check encoding    
16 Bitcoin/public point to address    
16 Cheryl's Birthday      
16 Chowla numbers      
16 Data Encryption Standard        
16 Eertree    
16 Four is magic  
16 HTTPS/Client-authenticated    
16 Index finite lists of positive integers  
16 K-d tree  
16 Law of cosines - triples  
16 Loops/Wrong ranges  
16 Loops/with multiple ranges  
16 Mersenne primes        
16 N-body problem      
16 Orbital elements      
16 P-value correction    
16 Percolation/Site percolation
16 Selective File Copy          
16 Snake And Ladder  
16 Strong and weak primes      
16 Vogel's approximation method  
15 Abbreviations, easy    
15 Addition chains      
15 Aspect Oriented Programming    
15 Assertions in design by contract          
15 Copy stdin to stdout        
15 Cuban primes        
15 Elementary cellular automaton/Infinite length      
15 Find duplicate files          
15 I.Q. Puzzle    
15 Kolakoski sequence    
15 Matrix chain multiplication      
15 NYSIIS    
15 Names to numbers    
15 Native shebang      
15 Percolation/Bond percolation  
15 Primes - allocate descendants to their ancestors
15 Rendezvous        
15 Sexy primes    
15 Vigenère cipher/Cryptanalysis      
15 Zeckendorf arithmetic      
14 Bitmap/Read an image through a pipe      
14 Compiler/code generator        
14 EKG sequence convergence  
14 Finite state machine        
14 Knuth's power tree  
14 Kosaraju      
14 List rooted trees      
14 Montgomery reduction      
14 Most frequent k chars distance    
14 Nested templated data      
14 Nonogram solver      
14 Perceptron          
14 Percolation/Mean cluster density
14 Polynomial synthetic division    
14 Retrieve and search chat history          
14 Separate the house number from the street name    
14 Terminal control/Positional read    
14 Untrusted environment      
13 Arithmetic coding/As a generalized change of radix      
13 Attractive numbers          
13 Bitmap/PPM conversion through a pipe      
13 Church Numerals        
13 Color wheel        
13 Compare sorting algorithms' performance      
13 Compiler/virtual machine interpreter          
13 Find URI in text            
13 Imaginary base numbers        
13 Monads/List monad          
13 Monads/Maybe monad              
13 Sequence: smallest number greater than previous term with exactly n divisors          
13 Spelling of ordinal numbers      
13 Transportation problem      
13 Word search      
12 Burrows–Wheeler transform      
12 Chemical Calculator          
12 Code segment unload            
12 Compiler/syntax analyzer        
12 Fixed length records        
12 Free polyominoes enumeration          
12 Gauss-Jordan matrix inversion      
12 Hunt The Wumpus          
12 Koch curve        
12 Proof                
12 Range consolidation      
12 Sequence: smallest number with exactly n divisors          
12 Topological sort/Extracted top item  
11 Compiler/AST interpreter        
11 File size distribution    
11 Just in time processing on a character stream            
11 Nim Game        
11 Particle Swarm Optimization          
11 Self-hosting compiler        
11 Snake          
11 Suffix tree    
11 Sunflower fractal          
11 Weird numbers        
11 XML Validation          
10 15 puzzle solver          
10 Chaocipher      
10 Continued fraction/Arithmetic/G(matrix NG, Contined Fraction N)        
10 Deconvolution/2D+        
10 Mayan numerals          
10 OpenWebNet Password        
10 Peano curve      
10 Singly-linked list/Element removal        
10 VList          
9 Canny edge detector          
9 Generalised floating point addition          
9 Mastermind            
9 Run as a daemon or service            
8 ASCII art diagram converter          
8 Banker's algorithm        
8 Combinations with repetitions/Square Digit Chain          
8 Draw pixel 2        
8 Eban numbers        
8 Four is the number of letters in the ...        
8 French Republican calendar          
8 Monads/Writer monad              
8 Numerical integration/Adaptive Simpson's method        
8 Parse EBNF              
8 Pell's equation              
8 Sequence: nth number with exactly n divisors            
8 Suffixation of decimal numbers          
8 Tarjan          
8 Time-based One-time Password Algorithm              
8 Vibrating rectangles        
7 21 Game          
7 Audio frequency generator                  
7 Base64 decode data            
7 Catmull–Clark subdivision surface              
7 Factorial base numbers indexing permutations of a collection          
7 IPC via named pipe              
7 Morpion solitaire            
7 OpenGL Pixel Shader            
7 Penrose tiling          
7 Pentomino tiling              
7 Pinstripe/Printer              
7 Railway circuit            
7 Resistance Calculator            
7 Simulated annealing            
7 Sorting algorithms/Tree sort on a linked list          
7 Spoof game            
7 Starting a web browser            
7 Tetris                  
7 User defined pipe and redirection operators          
7 Using a Speech engine to highlight words                  
6 Colour pinstripe/Printer              
6 Curve that touches three points          
6 Geometric algebra              
6 Greed              
6 Numerical and alphabetical suffixes              
6 One-time pad          
6 OpenGL/Utah Teapot          
6 Safe mode              
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 Matrix Digital Rain              
5 Multidimensional Newton-Raphson method              
5 Resistance Network Calculator            
5 Robots              
5 Rosetta Code/Run examples                  
5 Sine wave            
5 Text to HTML              
4 Hexapawn                
4 Interactive Help                
4 OLE Automation                
4 Peaceful chess queen armies              
4 Remote agent/Agent interface                
4 Remote agent/Agent logic                
4 Remote agent/Simulation                
4 Terminal control/Restricted width positional input/No wrapping            
4 Terminal control/Restricted width positional input/With wrapping            
4 Unit testing                
4 Using the Meetup.com API                
3 Audio Overlap Loop                  
3 Boids                
3 Elliptic Curve Digital Signature Algorithm                
3 I'm a software engineer, get me out of here                
3 Mayan calendar              
3 Rosetta Code/Rank languages by number of users                  
3 Rosetta Code/Tasks without examples                  
3 Solve a Rubik's Cube              
3 Tamagotchi emulator                    
2 16 Puzzle Game                    
2 Chess player                  
2 External sort                
2 Process SMIL directives in XML data                  
2 Recursive descent parser generator                  
2 Unicode polynomial equation                
1 15 Puzzle Game in 3D                    
1 Black Box                    
1 Generalised floating point multiplication                    
1 IRC gateway                    
1 Rosetta Code/List authors of task descriptions                  
1 Solving coin problems                  
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 Ukkonen’s Suffix Tree Construction                    
0 Weather Routing