irb − Interactive Ruby Shell
irb [−-version] [−dfUw] [−I directory] [−r library] [−E external[:internal]] [−W[level]] [−-[no]inspect] [−-[no]multiline] [−-[no]singleline] [−-[no]echo] [−-[no]colorize] [−-[no]autocomplete] [−-[no]verbose] [−-prompt mode] [−-prompt-mode mode] [−-inf-ruby-mode] [−-simple-prompt] [−-noprompt] [−-tracer] [−-back-trace-limit n] [−-] [program_file] [argument ...]
irb is the REPL(read-eval-print loop) environment for Ruby programs.
−-version
Prints the version of .
−E
external[:internal]
−-encoding external[:internal]
Same as ‘ruby -E’ . Specifies the default value(s) for external encodings and internal encoding. Values should be separated with colon (:).
You can omit the one for internal encodings, then the value ("Encoding.default_internal") will be nil.
−I path
Same as ‘ruby -I’ . Specifies $LOAD_PATH directory
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−U |
Same as ‘ruby -U’ . Sets the default value for internal encodings ("Encoding.default_internal") to UTF-8. | ||
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−d |
Same as ‘ruby -d’ . Sets $DEBUG to true. | ||
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−f |
Suppresses read of ˜/.irbrc. | ||
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−w |
Same as ‘ruby -w’ . | ||
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−W |
Same as ‘ruby -W’ . | ||
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−h |
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−-help |
Prints a summary of the options. |
−r library
Same as ‘ruby -r’. Causes irb to load the library using require.
−-inspect
Uses ‘inspect’ for output (default except for bc mode)
−-noinspect
Doesn’t use inspect for output
−-multiline
Uses multiline editor module.
−-nomultiline
Doesn’t use multiline editor module.
−-singleline
Uses singleline editor module.
−-nosingleline
Doesn’t use singleline editor module.
−-extra-doc-dir
Add an extra doc dir for the doc dialog.
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−-echo |
Show result (default). |
−-noecho
Don’t show result.
−-echo-on-assignment
Show result on assignment.
−-noecho-on-assignment
Don’t show result on assignment.
−-truncate-echo-on-assignment
Show truncated result on assignment (default).
−-colorize
Use colorization.
−-nocolorize
Don’t use colorization.
−-autocomplete
Use autocompletion.
−-noautocomplete
Don’t use autocompletion.
−-verbose
Show details.
−-noverbose
Don’t show details.
−-prompt
mode
−-prompt-mode mode
Switch prompt mode. Pre-defined prompt modes are ‘default’, ‘simple’, ‘xmp’ and ‘inf-ruby’.
−-inf-ruby-mode
Uses prompt appropriate for inf-ruby-mode on emacs. Suppresses --multiline and --singleline.
−-simple-prompt
Makes prompts simple.
−-noprompt
No prompt mode.
−-tracer
Displays trace for each execution of commands.
−-back-trace-limit n
Displays backtrace top n and tail n. The default value is 16.
IRB_LANG
The locale used for .
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IRBRC |
The path to the personal initialization file. |
XDG_CONFIG_HOME
irb respects XDG_CONFIG_HOME. If this is set, load $XDG_CONFIG_HOME/irb/irbrc as a personal initialization file.
Also irb depends on same variables as ruby(1).
˜/.irbrc
Personal irb initialization. If IRBRC is set, read $IRBRC instead. If IRBRC is not set and XDG_CONFIG_HOME is set, $XDG_CONFIG_HOME/irb/irbrc is loaded.
% irb
irb(main):001:0> 1 + 1
2
irb(main):002:0> def t(x)
irb(main):003:1> x + 1
irb(main):004:1> end
=> :t
irb(main):005:0> t(3)
=> 4
irb(main):006:0> if t(3) == 4
irb(main):007:1> p :ok
irb(main):008:1> end
:ok
=> :ok
irb(main):009:0> quit
%
ruby(1).
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Security vulnerabilities should be reported via an email to Mt [email protected]. Reported problems will be published after being fixed. | ||
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Other bugs and feature requests can be reported via the Ruby Issue Tracking System (https://bugs.ruby-lang.org/). Do not report security vulnerabilities via this system because it publishes the vulnerabilities immediately. |
Written by Keiju ISHITSUKA.