IRB
Section: Misc. Reference Manual Pages (\&1)
Updated: Ruby Programmer's Reference Guide
Page Index
BSD mandoc
UNIX
NAME
irb
- Interactive Ruby Shell
SYNOPSIS
[-
-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
is the REPL(read-eval-print loop) environment for Ruby programs.
OPTIONS
- --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
- -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
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
%
SEE ALSO
ruby(1).
REPORTING BUGS
-
Security vulnerabilities should be reported via an email to
Mt security@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.