I'm working on modernizing Rosetta Code's infrastructure. Starting with communications. Please accept this time-limited open invite to RC's Slack.. --Michael Mol (talk) 20:59, 30 May 2020 (UTC)

Rosetta Code/Count examples/Full list

From Rosetta Code

Full output for the Rosetta Code/Count examples#Raku task. Updated periodically.

This is something of a experiment. The 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 Python
⑥ Perl
⑦ Kotlin
⑧ C
⑨ Java
⑩ Racket
As of 2020-11-29T22:47:14Z :: Tasks: 1078 :: Draft Tasks:213 :: Total Tasks: 1291 :: Total Examples: 71207
Count Task
474 Hello world/Text
316 99 bottles of beer
312 100 doors
307 FizzBuzz
282 Fibonacci sequence
281 Factorial
271 Comments
260 A+B
254 Empty program
236 Function definition
224 Loops/Infinite
221 Arrays
221 Reverse a string
220 Loops/While
215 Ackermann function
204 Loops/For
200 Conditional structures
196 Arithmetic/Integer
195 Greatest element of a list
188 Greatest common divisor
185 Array concatenation
185 Repeat a string
184 Averages/Arithmetic mean
184 Integer comparison
182 Increment a numerical string
181 Even or odd
176 Hello world/Graphical
171 Copy a string
168 Boolean values
166 Loops/Downward for
165 Character codes
163 String concatenation
162 Apply a callback to an array
162 Loops/Do-while
161 Array length
161 Sum and product of an array
160 Binary digits
160 Hello world/Newline omission
160 Loops/For with a specified step
160 Loops/Foreach
160 Sieve of Eratosthenes
160 String length
158 Loops/Break
158 Loops/N plus one half
156 Integer sequence
155 String case
155 Sum of a series
154 Generic swap
154 Palindrome detection
153 Tokenize a string
153 Towers of Hanoi
152 Leap year
152 Logical operations
151 Dot product
151 Empty string
151 Hailstone sequence
151 Rot-13
151 Sum of squares
148 Associative array/Creation
148 Filter
145 Execute a system command
145 Factors of an integer
145 Sort an integer array
145 Sorting algorithms/Bubble sort
144 Quine
142 Guess the number
141 Caesar cipher
140 Higher-order functions
140 User input/Text
139 Determine if a string is numeric
139 File input/output
139 Remove duplicate elements
137 Roman numerals/Encode
137 System time
136 Hello world/Standard error
135 Loop over multiple arrays simultaneously
134 Bitwise operations
134 Command-line arguments
134 Day of the week
134 Primality by trial division
134 Sorting algorithms/Quicksort
133 Read entire file
132 Create a file
131 Luhn test of credit card numbers
131 Sleep
131 Substring
129 Loops/Continue
129 Stack
128 Check that file exists
127 Generate lower case ASCII alphabet
127 Literals/String
127 Mutual recursion
126 Happy numbers
126 Pascal's triangle
125 Date format
125 Flatten a list
125 Zero to the zero power
124 Least common multiple
123 Binary search
121 Balanced brackets
121 Include a file  
121 Literals/Integer
121 Variables
120 ABC problem
120 Compound data type
120 Detect division by zero
120 Loops/Nested
120 Program termination
119 Function composition
118 Associative array/Iteration
118 Formatted numeric output
118 Knuth shuffle
117 Averages/Root mean square
117 Ethiopian multiplication
117 Null object
116 File size
116 Hash from two arrays
116 N-queens problem
116 Read a file line by line
116 Search a list
115 Classes
115 Mandelbrot set
115 Sorting algorithms/Insertion sort
114 Delete a file
113 Averages/Median
113 Case-sensitivity of identifiers
113 Count in octal
113 Count occurrences of a substring
113 Guess the number/With feedback
113 Matrix multiplication
113 Multiplication tables
113 Roman numerals/Decode
112 Hostname  
112 Identity matrix
112 Input loop
112 Matrix transposition
112 Real constants and functions
111 Environment variables
111 Random numbers
111 String matching
110 Anagrams
110 Babbage problem
110 Perfect numbers
110 Rename a file
109 Align columns
109 Arithmetic/Complex
109 HTTP
109 Haversine formula
109 Pick random element
109 Return multiple values
108 Accumulator factory
108 Find limit of recursion
107 Conway's Game of Life
107 Letter frequency
106 Pangram checker
105 Assertions
105 Horner's rule for polynomial evaluation
105 Infinity
105 Temperature conversion
104 Averages/Pythagorean means
104 Catalan numbers
104 Program name
104 Strip a set of characters from a string
104 Variadic function
103 Arithmetic-geometric mean
103 Levenshtein distance
103 Permutations
103 Substring/Top and tail
102 Evaluate binomial coefficients
102 Exceptions
102 Prime decomposition
102 Regular expressions
102 Run-length encoding
102 Zig-zag matrix
101 Anonymous recursion
101 Combinations
101 String append
101 Strip whitespace from a string/Top and tail
100 Nth root
100 Queue/Definition
100 String interpolation (included)
100 Trigonometric functions
99 Comma quibbling
99 Reverse words in a string
99 Sorting algorithms/Merge sort
98 24 game
98 Short-circuit evaluation
98 Sorting algorithms/Selection sort
97 Bulls and cows
97 Look-and-say sequence
96 Ordered words
96 Shell one-liner
96 Y combinator
95 Call a function
95 Create a two-dimensional array at runtime
95 Interactive programming  
95 Sierpinski triangle
94 Arbitrary-precision integers (included)
94 Collections
94 Enumerations
94 Middle three digits
93 Range extraction
93 String prepend
93 Vector products
92 Create an HTML table
92 Evolutionary algorithm
92 Execute Brain****
92 Exponentiation operator
92 First-class functions
92 Power set
92 Sorting algorithms/Gnome sort
92 Sum multiples of 3 and 5
92 Time a function
91 Range expansion
91 Sorting algorithms/Cocktail sort
90 Inheritance/Single
90 MD5
90 Random number generator (included)
90 Sequence of non-squares
90 Sierpinski carpet
90 Sum digits of an integer
90 Walk a directory/Non-recursively
89 Averages/Mode
89 Averages/Simple moving average
89 Cumulative standard deviation
89 One-dimensional cellular automata
88 Digital root
88 Dragon curve
88 JSON
88 Sort using a custom comparator
88 The Twelve Days of Christmas
87 Entropy
87 Forward difference
87 Langton's ant
87 N'th
87 String comparison
87 Symmetric difference
86 Five weekends
86 Hamming numbers
86 Monty Hall problem
85 CSV data manipulation
85 Harshad or Niven series
85 Sorting algorithms/Bogosort
85 Window creation
84 Abstract type
84 Abundant, deficient and perfect number classifications
84 CSV to HTML translation
84 Greatest subsequential sum
84 Josephus problem
84 Price fraction
83 Compare a list of strings
83 Gray code
83 Hello world/Newbie
83 Sort an array of composite structures
83 Tree traversal
82 Closures/Value capture
82 File modification time
82 Last Friday of each month
82 Map range
82 Menu
82 Number names  
81 Simple windowed application
81 Sorting algorithms/Heapsort
80 Amicable pairs
80 Box the compass
80 Hello world/Line printer
80 Introspection
80 Queue/Usage
79 Catamorphism
79 Literals/Floating point
79 Non-decimal radices/Convert
79 Number reversal game
79 Read a specific line from a file
79 SEDOLs
79 Set
79 Singly-linked list/Traversal
79 Spiral matrix
79 Terminal control/Clear the screen
79 Walk a directory/Recursively
79 Web scraping
78 Count in factors
78 Count the coins
78 Floyd's triangle
78 Monte Carlo methods
78 URL decoding
78 XML/Input
77 Bitmap
77 CRC-32
77 Calculating the value of e
77 Concurrent computing
77 Find common directory path
77 Roots of unity
77 Show the epoch
77 Sockets
77 Sorting algorithms/Shell sort
77 Terminal control/Ringing the terminal bell
76 Address of a variable  
76 Call an object method
76 Knapsack problem/0-1
76 Playing cards
76 Top rank per group
75 Date manipulation
75 Dynamic variable names  
75 Hofstadter Q sequence
75 Keyboard input/Obtain a Y or N response  
75 Linear congruential generator
75 Order two numerical lists
75 Proper divisors
75 Pythagorean triples
75 Sorting algorithms/Counting sort
75 Strip comments from a string
75 URL encoding
75 Word wrap
74 Almost prime
74 Averages/Mean angle
74 Fibonacci n-step number sequences
74 Find the last Sunday of each month
74 Here document  
74 Jensen's Device
74 Kaprekar numbers
74 Long multiplication
74 Lucas-Lehmer test
74 Multifactorial
73 Hello world/Web server
73 List comprehensions
73 Man or boy test
73 Modular inverse
73 Non-decimal radices/Output
73 Sorting algorithms/Comb sort
73 Soundex
72 Operator precedence
72 Semordnilap
72 Singly-linked list/Element definition
72 Unicode variable names
71 Anagrams/Deranged anagrams
71 Animation
71 Calendar
71 Empty directory
71 Equilibrium index
71 Exceptions/Catch an exception thrown in a nested call
71 Find the missing permutation
71 Gamma function
71 Multiple distinct objects
71 Phrase reversals
71 Pi
71 SHA-1
71 SHA-256
71 Special characters
71 Sudoku
71 Take notes on the command line
70 Bitmap/Bresenham's line algorithm  
70 Execute HQ9+
70 Flow-control structures
70 IBAN
70 Parsing/RPN calculator algorithm
70 Read a configuration file
70 Repeat
70 Split a character string based on change of character
70 Write entire file
69 AKS test for primes
69 Convert seconds to compound duration
69 Draw a sphere
69 Euler's sum of powers conjecture
69 Four bit adder
69 Longest common subsequence
69 Polymorphism
69 Quaternion type
69 Rock-paper-scissors
69 Sort disjoint sublist
68 15 puzzle game  
68 Call a foreign-language function
68 Enforced immutability
68 Guess the number/With feedback (player)
68 Horizontal sundial calculations
68 Numerical integration
68 Self-describing numbers
68 Stair-climbing puzzle
68 Trabb Pardo–Knuth algorithm
68 Vigenère cipher
68 Write float arrays to a text file
67 Catalan numbers/Pascal's triangle
67 Combinations with repetitions
67 Constrained random points on a circle
67 Currying
67 Fork
67 Fractal tree
67 Munchausen numbers
67 Show ASCII table
67 Sorting algorithms/Stooge sort
67 Zeckendorf number representation
66 Arithmetic/Rational
66 Benford's law
66 Closest-pair problem
66 Maze generation
65 Euler method
65 Largest int from concatenated ints
65 Magic squares of odd order
65 Named parameters
65 Optional parameters
65 Population count
65 Sort stability
65 Variable size/Get  
64 Extend your language  
64 Hofstadter-Conway $10,000 sequence
64 Inheritance/Multiple
64 Morse code
64 Priority queue
64 Runtime evaluation    
64 Text processing/Max licenses in use
64 Unix/ls
64 XML/Output
63 Amb  
63 Cholesky decomposition
63 Continued fraction
63 Documentation
63 Fast Fourier transform
63 Jump anywhere
63 Remove lines from a file
63 Roots of a function
63 Singly-linked list/Element insertion
63 Special variables
63 Strip control codes and extended characters from a string
63 Undefined values
63 Van der Corput sequence
62 Barnsley fern
62 Chinese remainder theorem
62 Factors of a Mersenne number
62 HTTPS
62 Memory allocation
62 Narcissistic decimal number
62 Nested function
62 One of n lines in a file
62 Pernicious numbers
62 Sorting algorithms/Pancake sort
62 Write language name in 3D ASCII
61 General FizzBuzz
61 Get system command output
61 Non-decimal radices/Input
61 Probabilistic choice
61 Rep-string
61 Sorting algorithms/Sleep sort
60 Arithmetic evaluation
60 Binary strings
60 Circles of given radius through two points
60 Modular exponentiation
60 Old lady swallowed a fly
60 Plot coordinate pairs
60 Reduced row echelon form
60 Roots of a quadratic function
60 Runge-Kutta method
60 Semiprime
60 Sequence of primes by trial division
60 Test a function
59 Animate a pendulum
59 Averages/Mean time of day
59 Department numbers
59 Draw a clock
59 Exponentiation order
59 Globally replace text in several files
59 Host introspection
59 Mouse position
59 Thue-Morse
59 User input/Graphical
59 Word frequency
58 24 game/Solve  
58 9 billion names of God the integer
58 Anti-primes
58 Brownian tree
58 Huffman coding
58 Knapsack problem/Continuous
58 Partial function application
58 Tic-tac-toe
58 Unicode strings
57 Angle difference between two bearings
57 Delegates
57 Dutch national flag problem
57 Emirp primes
57 Generator/Exponential
57 Knapsack problem/Unbounded
57 LZW compression
57 Left factorials
57 Miller–Rabin primality test
57 Sorting algorithms/Bead sort
57 Yin and yang
56 4-rings or 4-squares puzzle
56 Add a variable to a class instance at runtime      
56 Best shuffle
56 Compile-time calculation    
56 Deal cards for FreeCell
56 Fibonacci word
56 Hash join  
56 JortSort
56 Knight's tour
56 Matrix-exponentiation operator  
56 Singleton
56 Sort three variables
56 Sorting algorithms/Permutation sort
56 Stem-and-leaf plot
56 Truncatable primes  
56 Two sum
56 XML/XPath  
55 2048
55 Bitmap/Write a PPM file  
55 Define a primitive data type  
55 Dinesman's multiple-dwelling problem
55 Doubly-linked list/Element definition
55 Extreme floating point values
55 Forest fire  
55 Grayscale image
55 I before E except after C
55 Odd word problem
55 Scope modifiers
55 Stack traces
55 Terminal control/Display an extended character
54 Draw a cuboid
54 Integer overflow
54 Jewels and stones
54 Leonardo numbers
54 Multisplit
54 Munching squares
54 Random number generator (device)
54 Runtime evaluation/In an environment    
54 Sierpinski triangle/Graphical
53 Base64 encode data
53 CUSIP
53 Discordian date
53 Extract file extension
53 Pointers and references  
53 Rosetta Code/Rank languages by popularity  
53 Send email
53 Subleq
53 Synchronous concurrency
53 Terminal control/Cursor positioning    
53 Topological sort
53 XML/DOM serialization
52 Bernoulli numbers
52 Handle a signal
52 Inverted syntax
52 Iterated digits squaring
52 Maximum triangle path sum
52 Statistics/Basic
52 Text processing/2
52 Truncate a file
51 100 prisoners
51 Cartesian product of two or more lists
51 Draw a pixel
51 First-class functions/Use numbers analogously    
51 Keyboard input/Keypress check
51 Longest common prefix
51 Ludic numbers
51 Mad Libs  
51 Modulinos  
51 Quickselect algorithm
51 Ternary logic
50 Chinese zodiac
50 Convert decimal number to rational
50 Dining philosophers
50 Heronian triangles
50 Long year    
50 Non-continuous subsequences
50 Respond to an unknown method call    
50 Terminal control/Coloured text  
50 Unbias a random generator
50 Universal Turing machine
50 Wireworld  
49 Archimedean spiral
49 Attractive numbers
49 Damm algorithm
49 Dijkstra's algorithm
49 Farey sequence
49 Fractran
49 GUI component interaction  
49 Seven-sided dice from five-sided dice
49 Text processing/1
49 Validate International Securities Identification Number
48 Call a function in a shared library
48 Colour bars/Display
48 Doubly-linked list/Element insertion
48 Doubly-linked list/Traversal  
48 Extensible prime generator
48 FASTA format
48 Find the intersection of two lines
48 Gaussian elimination
48 Longest increasing subsequence
48 Loops/Increment loop index within loop body
48 Smith numbers
48 Strip block comments
48 Tokenize a string with escaping
47 Abundant odd numbers
47 Base64 decode data  
47 DNS query      
47 Echo server  
47 Longest common substring
47 Make directory path
47 Move-to-front algorithm
47 Polymorphic copy
47 Polynomial regression
47 Rate counter
47 Shoelace formula for polygonal area
47 Vector
47 Zebra puzzle
46 Append a record to the end of a text file
46 Bitmap/Flood fill
46 Determinant and permanent
46 Determine if a string has all the same characters
46 Determine if only one instance is running
46 Egyptian division
46 Greyscale bars/Display
46 Holidays related to Easter
46 Jaro distance
46 Longest string challenge
46 Metaprogramming  
46 Pascal matrix generation
46 Search a list of records
46 Stable marriage problem
46 Stern-Brocot sequence
45 Average loop length
45 Chaos game
45 History variables  
45 Hofstadter Figure-Figure sequences  
45 Image noise
45 Naming conventions  
45 Password generator
45 Pig the dice game
45 Send an unknown method call  
45 Set consolidation
44 Carmichael 3 strong pseudoprimes
44 Doubly-linked list/Definition  
44 Element-wise operations
44 Execute a Markov algorithm
44 Last letter-first letter
44 OpenGL
44 Perfect shuffle
44 Polynomial long division
44 Rosetta Code/Count examples    
44 Sattolo cycle
44 Sort numbers lexicographically
44 Sparkline in unicode
43 Active object
43 Bitmap/Read a PPM file  
43 Kronecker product
43 Narcissist
43 Parsing/Shunting-yard algorithm
43 Sorting algorithms/Radix sort
43 Verify distribution uniformity/Naive
43 Visualize a tree
42 Atomic updates
42 Bulls and cows/Player
42 Cantor set
42 Determine if a string has all unique characters  
42 Determine if a string is collapsible  
42 Digital root/Multiplicative digital root
42 Elementary cellular automaton
42 GUI/Maximum window dimensions
42 Generate Chess960 starting position
42 Keyboard input/Flush the keyboard buffer  
42 Percentage difference between images
42 RPG attributes generator
42 Ulam spiral (for primes)
41 Aliquot sequence classifications
41 Calendar - for "REAL" programmers    
41 Hickerson series of almost integers
41 Knapsack problem/Bounded
41 MD5/Implementation
41 McNuggets problem
41 Nim game
41 Secure temporary file
41 Speech synthesis  
41 Spinning rod animation/Text
41 Start from a main routine    
41 Sum to 100
41 Table creation/Postal addresses    
41 Terminal control/Dimensions  
41 Twelve statements  
41 Variable size/Set  
41 Voronoi diagram
40 Combinations and permutations
40 Currency
40 Fusc sequence
40 Hilbert curve
40 Kernighans large earthquake problem
40 Pascal's triangle/Puzzle
40 Problem of Apollonius
40 Sorting algorithms/Strand sort
40 Subtractive generator
40 Text between
40 Van Eck sequence
40 Variable-length quantity
40 Water collected between towers
39 Associative array/Merging  
39 Balanced ternary
39 Brace expansion
39 Casting out nines
39 Color of a screen pixel
39 Copy stdin to stdout
39 GUI enabling/disabling of controls  
39 Inverted index
39 Parametric polymorphism    
39 Permutations/Derangements
39 S-expressions
39 Topswops
39 UTF-8 encode and decode
38 Abbreviations, automatic  
38 Break OO privacy    
38 Colour pinstripe/Display
38 Constrained genericity      
38 Deepcopy
38 Julia set
38 LU decomposition
38 Magic 8-ball
38 Parallel calculations
38 Prime conspiracy
38 Sorting Algorithms/Circle Sort
38 Taxicab numbers
37 Bitmap/Midpoint circle algorithm      
37 Chowla numbers
37 Cramer's rule
37 Create a file on magnetic tape  
37 Euler's identity
37 Fivenum
37 Flipping bits game
37 Gapful numbers  
37 Knuth's algorithm S
37 Magic squares of doubly even order  
37 Order disjoint list items  
37 Parsing/RPN to infix conversion
37 Permutations by swapping
37 Primorial numbers
37 Pythagorean quadruples
37 QR decomposition  
37 Ray-casting algorithm
37 Sailors, coconuts and a monkey problem
37 Sort a list of object identifiers
37 Statistics/Normal distribution
37 Summarize and say sequence
37 Terminal control/Inverse video  
37 Vampire number
36 21 game  
36 Abbreviations, easy
36 Bell numbers  
36 File extension is in extensions list
36 Find palindromic numbers in both binary and ternary bases
36 Function prototype    
36 MAC Vendor Lookup
36 Musical scale  
36 Object serialization  
36 Pathological floating point problems
36 Permutation test
36 Scope/Function names and labels  
36 Square but not cube
36 Terminal control/Hiding the cursor  
36 Test integerness
35 Bitmap/Bézier curves/Cubic    
35 Bitwise IO  
35 Brazilian numbers  
35 Days between dates  
35 Events    
35 Feigenbaum constant calculation
35 Floyd-Warshall algorithm
35 ISBN13 check digit
35 Input/Output for lines of text
35 Input/Output for pairs of numbers
35 Lychrel numbers  
35 MD4
35 Metered concurrency
35 Minesweeper game  
35 Multiline shebang    
35 Numerical integration/Gauss-Legendre Quadrature
35 Permutations with repetitions
35 Pinstripe/Display
35 Solve the no connection puzzle
35 Substitution cipher
35 Terminal control/Unicode output  
35 The Name Game  
34 Arithmetic-geometric mean/Calculate Pi
34 Conjugate transpose  
34 Cuban primes
34 Display a linear combination
34 Egyptian fractions
34 Entropy/Narcissist
34 Fibonacci word/fractal
34 Kahan summation
34 Largest number divisible by its digits  
34 Maze solving
34 Penney's game
34 Read a file character by character/UTF8
34 Sutherland-Hodgman polygon clipping
33 Abbreviations, simple
33 Approximate equality
33 Check output device is a terminal  
33 Determine if a string is squeezable  
33 Executable library  
33 Find the intersection of a line with a plane
33 Integer roots
33 Long primes
33 Loops/Wrong ranges
33 Ordered partitions  
33 Parametrized SQL statement
33 Parse command-line arguments  
33 RIPEMD-160
33 Ranking methods
33 Rosetta Code/Find bare lang tags    
33 Square-free integers
33 Topic variable    
33 Totient function
33 Truth table
32 Bitcoin/address validation
32 Bitmap/Bézier curves/Quadratic    
32 Cheryl's birthday
32 Convex hull
32 Humble numbers
32 Metronome
32 Mutex  
32 Pentagram
32 Pythagoras tree
32 Recaman's sequence  
32 Sorting algorithms/Patience sort
32 Subset sum problem
32 URL parser  
31 Apply a digital filter (direct form II transposed)
31 Bitmap/Histogram  
31 Continued fraction/Arithmetic/Construct from rational number
31 Decimal floating point number to binary  
31 Determine if two triangles overlap
31 Eban numbers  
31 Execute SNUSP
31 Factorions  
31 Galton box animation
31 Loops/With multiple ranges  
31 Multiple regression  
31 Multiplicative order
31 Negative base numbers
31 Numeric error propagation
31 Pattern matching      
31 RSA code
31 Remove vowels from a string  
31 Resistor mesh
31 Set puzzle
31 Straddling checkerboard
31 Terminal control/Cursor movement  
31 Textonyms
31 Write to Windows event log
30 Check Machin-like formulas  
30 Check input device is a terminal  
30 Cycle detection
30 First class environments  
30 Idiomatically determine all the lowercase and uppercase letters
30 Implicit type conversion
30 Keyboard macros
30 Koch curve  
30 Mersenne primes  
30 Multi-dimensional array
30 Partition an integer x into n primes
30 Poker hand analyser
30 Reflection/List properties    
30 Simple database
30 Solve a Hidato puzzle
29 Chat server  
29 Checkpoint synchronization
29 Death Star  
29 Dice game probabilities
29 FTP
29 Faulhaber's triangle
29 Memory layout of a data structure    
29 Old Russian measure of length
29 Palindrome dates    
29 Parallel brute force
29 Perfect totient numbers
29 Terminal control/Preserve screen
29 Use another language to call a function    
29 Window creation/X11
29 Zhang-Suen thinning algorithm
28 Arena storage pool    
28 Bacon cipher
28 Chaocipher  
28 Church numerals    
28 Compiler/lexical analyzer  
28 Deconvolution/1D
28 Faulhaber's formula  
28 HTTPS/Authenticated  
28 Mian-Chowla sequence  
28 Modular arithmetic
28 Pragmatic directives  
28 Rosetta Code/Find unimplemented tasks        
28 Safe primes and unsafe primes  
28 Sequence: smallest number greater than previous term with exactly n divisors  
28 Sequence: smallest number with exactly n divisors  
28 Set of real numbers
28 Word break problem  
28 Xiaolin Wu's line algorithm
27 AVL tree    
27 Active Directory/Connect  
27 Burrows–Wheeler transform  
27 Chebyshev coefficients
27 Decision tables
27 Diversity prediction theorem  
27 Draw a rotating cube
27 Find first and last set bit of a long integer
27 Formal power series
27 Four is magic
27 Honeycombs  
27 Jacobi symbol  
27 Lah numbers  
27 Paraffins
27 Ramsey's theorem
27 Rosetta Code/Fix code tags    
27 Safe addition
27 Sorting algorithms/Cycle sort
27 State name puzzle
27 Sum and product puzzle
27 Superellipse
27 Update a configuration file
27 Verify distribution uniformity/Chi-squared test
27 Weird numbers
27 Yellowstone sequence
26 Angles (geometric), normalization and conversion
26 Bioinformatics/base count  
26 Chemical calculator
26 Cut a rectangle
26 Distributed programming      
26 Find largest left truncatable prime in a given base
26 Go Fish  
26 Natural sorting  
26 Nautical bell
26 Polyspiral  
26 Reflection/List methods    
26 Same fringe  
26 Strong and weak primes  
26 Table creation      
26 Thiele's interpolation formula
25 Birthday problem
25 Card shuffles
25 Color wheel  
25 Create an object at a given address      
25 Fairshare between two and more  
25 Fraction reduction
25 Image convolution
25 Law of cosines - triples  
25 N-smooth numbers  
25 RCRPG  
25 Sequence of primorial primes
25 Sexy primes  
25 Smarandache prime-digital sequence    
25 Super-d numbers  
25 The ISAAC Cipher
25 Type detection    
24 First power of 2 that has leading decimal digits of 12  
24 K-means++ clustering  
24 Kronecker product based fractals  
24 Length of an arc between two angles  
24 Peano curve  
24 Pell's equation  
24 Perlin noise
24 Plasma effect
24 Play recorded sounds          
24 Primality by Wilson's theorem    
24 Ramer-Douglas-Peucker line simplification
24 Range consolidation
24 Sierpinski pentagon  
24 Simulate input/Keyboard    
24 Solve a Holy Knight's tour  
24 Stirling numbers of the second kind  
24 Successive prime differences  
24 Welch's t-test
24 Yahoo! search interface      
23 A* search algorithm  
23 Circular primes  
23 Deming's Funnel  
23 Fermat numbers  
23 First perfect square in base n with n unique digits  
23 Generate random chess position  
23 Hough transform
23 Machine code    
23 Magic squares of singly even order  
23 Main step of GOST 28147-89  
23 Make a backup file  
23 Markov chain text generator  
23 Minimum positive multiple in base 10 using only 0 and 1    
23 Monads/Maybe monad      
23 Palindromic gapful numbers      
23 Record sound    
23 SOAP    
23 Stirling numbers of the first kind  
23 Stream merge  
23 Teacup rim text    
23 Unprimeable numbers
23 Video display modes      
23 World Cup group stage  
23 Zumkeller numbers  
22 Audio alarm      
22 Base58Check encoding  
22 Cipolla's algorithm
22 Create an object/Native demonstration  
22 Elementary cellular automaton/Random Number Generator  
22 Elliptic curve arithmetic
22 Function frequency    
22 Gauss-Jordan matrix inversion    
22 Idiomatically determine all the characters that can be used for symbols  
22 Linux CPU utilization  
22 Lucky and even lucky numbers  
22 Mind boggling card trick    
22 Nonoblock  
22 Parse an IP Address
22 Percolation/Mean run density  
22 Permutations/Rank of a permutation
22 Reverse the gender of a string  
22 Spelling of ordinal numbers  
22 Superpermutation minimisation
22 Tonelli-Shanks algorithm
22 Total circles area
21 Abelian sandpile model    
21 Active Directory/Search for a user        
21 Commatizing numbers  
21 De Bruijn sequences  
21 Fixed length records        
21 Intersecting number wheels  
21 Isqrt (integer square root) of X        
21 Joystick position          
21 Möbius function    
21 Pig the dice game/Player    
21 Playfair cipher    
21 Sorting algorithms/Cocktail sort with shifting bounds    
21 Window management  
20 Addition chains
20 Data Encryption Standard  
20 Find duplicate files    
20 Kolakoski sequence  
20 Magnanimous numbers      
20 Mastermind      
20 Median filter  
20 Native shebang    
20 Next highest int from digits  
20 Numeric separator syntax  
20 Orbital elements  
20 Pierpont primes  
20 Random Latin squares  
20 Reflection/Get source      
20 Shortest common supersequence
20 Snake and Ladder
20 Sokoban
20 Solve a Hopido puzzle  
20 Solve a Numbrix puzzle    
19 Bilinear interpolation
19 Bioinformatics/Sequence mutation  
19 Color quantization  
19 Eertree  
19 Finite state machine  
19 Hunt the Wumpus      
19 Index finite lists of positive integers  
19 Monads/List monad      
19 N-body problem  
19 Names to numbers    
19 Numbers with prime digits whose sum is 13        
19 Perceptron    
19 Readline interface
19 Simulate input/Mouse    
19 Sunflower fractal    
19 Untrusted environment      
18 Arithmetic coding/As a generalized change of radix    
18 Assertions in design by contract      
18 Code segment unload  
18 Compiler/code generator    
18 EKG sequence convergence  
18 Elementary cellular automaton/Infinite length    
18 Esthetic numbers    
18 Find URI in text      
18 K-d tree  
18 Knuth's power tree  
18 Monads/Writer monad        
18 Print debugging statement
18 SQL-based authentication
18 Selective file copy    
18 Sierpinski arrowhead curve        
18 Sum data type      
18 Vigenère cipher/Cryptanalysis
18 Vogel's approximation method  
17 15 puzzle solver          
17 Bitcoin/public point to address    
17 Compiler/syntax analyzer      
17 Compiler/virtual machine interpreter      
17 Draw pixel 2    
17 Imaginary base numbers  
17 Just in time processing on a character stream
17 Kosaraju  
17 Levenshtein distance/Alignment  
17 List rooted trees  
17 Longest common suffix        
17 Mertens function      
17 Metallic ratios    
17 Montgomery reduction
17 Numbers with equal rises and falls        
17 P-value correction  
17 Percolation/Site percolation  
17 Primes - allocate descendants to their ancestors
17 Proof            
17 Separate the house number from the street name    
17 Solve triangle solitare puzzle  
17 UPC    
17 Zeckendorf arithmetic  
16 Aspect oriented programming  
16 Bitmap/Read an image through a pipe      
16 File size distribution  
16 HTTPS/Client-authenticated    
16 Increasing gaps between consecutive Niven numbers      
16 Line circle intersection    
16 Matrix digital rain    
16 Most frequent k chars distance    
16 NYSIIS  
16 Particle swarm optimization  
16 Polynomial synthetic division  
16 Self-hosting compiler          
16 Terminal control/Positional read  
16 Transportation problem      
16 Twin primes    
16 Word search  
16 Word wheel      
15 ASCII art diagram converter    
15 Canonicalize CIDR      
15 Chernick's Carmichael numbers      
15 Free polyominoes enumeration      
15 Geometric algebra      
15 Matrix chain multiplication    
15 Mayan numerals      
15 Nested templated data      
15 Nonogram solver    
15 Percolation/Bond percolation  
15 Percolation/Mean cluster density  
15 Rendezvous        
15 Retrieve and search chat history        
15 Singly-linked list/Element removal    
15 Snake    
15 Suffix tree  
14 Bitmap/PPM conversion through a pipe      
14 Compare sorting algorithms' performance        
14 Compiler/AST interpreter      
14 Cyclotomic polynomial    
14 Gradient descent        
14 Latin Squares in reduced form      
14 Logistic curve fitting in epidemiology  
14 Numerical integration/Adaptive Simpson's method  
14 Peaceful chess queen armies  
14 Permutations with some identical elements          
14 Rare numbers          
14 Self numbers          
14 Tarjan    
14 Vibrating rectangles    
14 XML validation    
13 Biorhythms          
13 Deconvolution/2D+      
13 Four is the number of letters in the ...  
13 Functional coverage tree    
13 Generalised floating point addition    
13 Jaro-Winkler distance        
13 Long literals, with continuations          
13 Sequence: nth number with exactly n divisors    
13 Sine wave      
13 Topological sort/Extracted top item
12 Abelian sandpile model/Identity          
12 Banker's algorithm    
12 Canny edge detector          
12 Continued fraction/Arithmetic/G(matrix ng, continued fraction n)      
12 Interactive help        
12 Nimber arithmetic        
12 OpenWebNet password    
12 Pisano period      
12 Print itself        
12 Pseudo-random numbers/Splitmix64        
12 Ramanujan's constant      
12 Safe mode            
12 Sierpinski curve        
12 Simulated annealing        
11 Audio frequency generator            
11 Factorial base numbers indexing permutations of a collection        
11 Geohash        
11 Getting the number of decimals      
11 Greed        
11 Longest palindromic substrings        
11 Pseudo-random numbers/PCG32          
11 Sierpinski square curve        
11 Sorting algorithms/Tree sort on a linked list      
11 Square root by hand          
11 Tetris          
11 Text completion        
11 VList        
10 Almkvist-Giullera formula for pi          
10 Catmull–Clark subdivision surface            
10 Checksumcolor        
10 Cistercian numerals          
10 Colour pinstripe/Printer        
10 Execute CopyPasta Language      
10 Exponentiation with infix operators in (or operating on) the base          
10 External sort        
10 Find if a point is within a triangle        
10 One-time pad  
10 Pancake numbers        
10 Penrose tiling    
10 Pentomino tiling      
10 Pseudo-random numbers/Xorshift star          
10 Railway circuit      
10 Resistance calculator        
10 Run as a daemon or service          
10 Spoof game      
10 Time-based one-time password algorithm          
10 Using a speech engine to highlight words              
9 Combinations with repetitions/Square digit chain        
9 Curve that touches three points          
9 Display an outline as a nested table        
9 Faces from a mesh        
9 Fibonacci matrix-exponentiation        
9 French Republican calendar        
9 IPC via named pipe          
9 Launch rocket with countdown and acceleration in stdout        
9 Morpion solitaire        
9 Parse EBNF            
9 Pinstripe/Printer          
9 Starting a web browser        
9 Suffixation of decimal numbers        
9 Text to HTML        
9 Three word location        
9 Unit testing          
9 XXXX redacted          
8 Minimal steps down to 1        
8 Minkowski question-mark function            
8 Non-transitive dice            
8 Numerical and alphabetical suffixes          
8 Partition function P          
8 Powerful numbers        
8 Quoting constructs            
8 Resistance network calculator        
8 Rosetta Code/Tasks without examples        
8 Sort an outline at every level          
8 Tree datastructures        
8 User defined pipe and redirection operators          
7 16 puzzle game            
7 Alternade words            
7 Brace expansion using ranges          
7 Compiler/Verifying syntax        
7 Elliptic Curve Digital Signature Algorithm        
7 Fibonacci heap        
7 Graph colouring        
7 Mayan calendar          
7 Multidimensional Newton-Raphson method          
7 Pseudo-random numbers/Combined recursive generator MRG32k3a          
7 Pseudorandom number generator image          
7 Range modifications          
7 Robots        
7 Rosetta Code/Rank languages by number of users          
7 Two bullet roulette          
7 URL shortener            
6 Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)            
6 Doubly-linked list/Element removal            
6 OpenGL pixel shader            
6 OpenGL/Utah Teapot            
6 Recursive descent parser generator            
6 Rosetta Code/Run examples                
6 SHA-256 Merkle tree          
5 Addition-chain exponentiation            
5 Audio overlap loop                
5 Black Box              
5 Boids          
5 Chess player            
5 Hexapawn              
5 Price list behind API            
5 Process SMIL directives in XML data            
5 Raster bars            
5 Remote agent/Agent interface              
5 Remote agent/Agent logic              
5 Remote agent/Simulation              
5 Smallest enclosing circle problem            
5 Solve a Rubik's Cube            
5 Terminal control/Restricted width positional input/No wrapping            
5 Terminal control/Restricted width positional input/With wrapping            
5 Waveform analysis/Doh ray me          
4 Generalised floating point multiplication              
4 I'm a software engineer, get me out of here              
4 OLE automation                
4 Strassen's algorithm              
4 Tamagotchi emulator                  
4 Unicode polynomial equation              
4 Using the Meetup.com API              
4 Weather routing              
3 Latin Squares in reduced form/Randomizing using Jacobson and Matthews’ Technique                
3 Rosetta Code/List authors of task descriptions              
3 Solving coin problems              
3 Ukkonen’s suffix tree construction              
3 Vidir                
3 Waveform analysis/Top and tail              
2 15 puzzle game in 3D                  
2 CLI-based maze-game                  
2 IRC gateway                  
1 Blackjack strategy