Interactive Ruby Shell
Screenshot The screenshot session as same as the article example | |
Developer(s) | Keiju Ishitsuka |
---|---|
Stable release |
0.9.6
/ June 30, 2009 |
Written in | Ruby |
Operating system | Cross-platform |
Platform | Ruby interpreter |
Type | Ruby shell |
License |
Ruby License BSD License |
Website |
www |
Interactive Ruby Shell (IRB or irb) is a REPL for programming in the object-oriented scripting language Ruby. The abbreviation irb comes from the fact that the filename extension for Ruby is ".rb", although interactive Ruby files do not have an extension of ".irb". The program is launched from a command line and allows the execution of Ruby commands with immediate response, experimenting in real-time. It features command history, line editing capabilities, and job control, and is able to communicate directly as a shell script over the Internet and interact with a live server. It was developed by Keiju Ishitsuka. Program usage:
irb [ options ] [ programfile ] [ argument... ]
Example usage:
irb(main):001:0> n = 5
=> 5
irb(main):002:0> def fact(n)
irb(main):003:1> if n <= 1
irb(main):004:2> 1
irb(main):005:2> else
irb(main):006:2* n * fact(n - 1)
irb(main):007:2> end
irb(main):008:1> end
=> :fact
irb(main):009:0> fact(n)
=> 120
See also
External links
- "Try Ruby" Online IRB
- "When Trouble Strikes" chapter from Programming Ruby
- "Interactive Ruby Shell" chapter from Programming Ruby
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