irb (1) - Linux Manuals
irb: Interactive Ruby Shell
UNIXNAME
irb - Interactive Ruby Shell
SYNOPSIS
irb [--version ] [-dfUw [-I directory ] ] [-r library ] [-E external [: internal ] ] [-W [level ] ] [-- [no inspect ] ] [-- [no multiline ] ] [-- [no singleline ] ] [-- [no echo ] ] [-- [no colorize ] ] [-- [no verbose ] ] [--prompt mode ] [--prompt-mode mode ] [--inf-ruby-mode ] [--simple-prompt ] [--noprompt ] [--tracer ] [--back-trace-limit n ] [- ] [program_file] [argument ...]DESCRIPTION
irb is the REPL(read-eval-print loop) environment for Ruby programs.OPTIONS
- --version
-
Prints the version of
irb.
- -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
- -U
-
Same as `ruby -U' .
Sets the default value for internal encodings
( Encoding.default_internal ) to UTF-8.
- -d
-
Same as `ruby -d' .
Sets
$DEBUG
to true.
- -f
-
Suppresses read of
~/.irbrc
- -w
-
Same as `ruby -w' .
- -W
-
Same as `ruby -W' .
- -h
- --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.
- --echo
-
Show result(default).
- --noecho
-
Don't show result.
- --colorize
-
Use colorization.
- --nocolorize
-
Don't use colorization.
- --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.
ENVIRONMENT
- IRBRC
-
Also irb depends on same variables as ruby(1).
FILES
- ~/.irbrc
-
Personal irb initialization.
EXAMPLES
% 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
%
REPORTING BUGS
-
Security vulnerabilities should be reported via an email to
Mt security [at] ruby-lang.org .
Reported problems will be published after being fixed.
- Other bugs and feature requests can be reported via the Ruby Issue Tracking System (Lk https://bugs.ruby-lang.org/ ) Do not report security vulnerabilities via this system because it publishes the vulnerabilities immediately.
AUTHORS
Written by Keiju ISHITSUKA.