Rosetta Code is a wiki-based programming chrestomathy website with implementations of common algorithms and solutions to various programming problems in many different programming languages. It was created in 2007 by Mike Mol.
- 848 programming tasks (or problems),
- 197 additional draft programming tasks,
- 628 programming languages,
- 54,598 programming language examples/entries.
The Rosetta Code web repository illustrates how desired functionality is implemented very differently in various programming paradigms,  and how "the same" task is accomplished in different programming languages.
Data and structure
The Rosetta Code site is organized as a browsable cross-section of tasks (specific programming problems or considerations) and computer programming languages. A task's page displays visitor-contributed solutions in various computer languages, allowing a viewer to compare each language's approach to the task's stated problem. Task pages are included in per-language listings based on the languages of provided solutions; a task with a solution in the C programming language will appear in the listing for C. If the same task has a solution in Ruby, the task will appear in the listing for Ruby as well.
Selection of languages
The following represents a small sample of the over 600 computer programming languages found on Rosetta Code:
- BBC Basic
Selection of tasks
The following represents a sample of the tasks found on Rosetta Code:
- Ackermann function
- Bitwise operations
- Empty program
- Fibonacci sequence
- Function definition
- Hello world/Text
- Random numbers
- sorting algorithms
- 99 Bottles of Beer
- 100 doors
- Ralf Lämmel. "Software chrestomathies". doi:10.1016/j.scico.2013.11.014. 2013.
- "Welcome to Rosetta Code". Retrieved 2017-05-14.
- "Rosetta Code:Copyrights". Retrieved 2010-12-19.
- Neil Walkinshaw. Chapter One: "Reverse-Engineering Software Behavior". "Advances in Computers". 2013. p. 14.
- Geoff Cox. "Speaking Code: Coding as Aesthetic and Political Expression". MIT Press, 2013. p. 6.
- Nick Montfort "No Code: Null Programs". 2013. p. 10.
- "Most linked-to categories". Retrieved 2016-04-10.
- "Pages with the most categories". Retrieved 2011-07-18.