irb(1) [osx man page]

IRB(1)							 Ruby Programmers Reference Guide						    IRB(1)

NAME

     irb -- Interactive Ruby Shell

SYNOPSIS

     irb [--version] [-dfm] [-I directory] [-r library] [--[no]inspect] [--[no]readline] [--prompt mode] [--prompt-mode mode] [--inf-ruby-mode]
	 [--simple-prompt] [--noprompt] [--tracer] [--back-trace-limit n] [--irb_debug 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.

     -h
     --help	    Prints a summary of the options.

     -m 	    Bc mode (load mathn, fraction or matrix are available)

     -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

     --readline     Uses Readline extension module.

     --noreadline   Doesn't use Readline extension module.

     --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 --readline.

     --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_debug n  Sets internal debug level to n (not for popular use)

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
	   => nil
	   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 <security@ruby-lang.org>.  Reported problems will be published after being fixed.

     And you can report other bugs and feature requests via the Ruby Issue Tracking System (http://bugs.ruby-lang.org).  Do not report security
     vulnerabilities via the system because it publishes the vulnerabilities immediately.

AUTHORS

     Written by Keiju ISHITSUKA.

UNIX
								 November 7, 2012							      UNIX

Check Out this Related Man Page

ERB(1)							 Ruby Programmer's Reference Guide						    ERB(1)

NAME

     erb -- Ruby Templating

SYNOPSIS

     erb [--version] [-UPdnvx] [-E ext[:int]] [-S level] [-T mode] [-r library] [--] [file ...]

DESCRIPTION

     erb is a command line front-end for ERB library, which is an implementation of eRuby.

     ERB provides an easy to use but powerful templating system for Ruby.  Using ERB, actual Ruby code can be added to any plain text document for
     the purposes of generating document information details and/or flow control.

     erb is a part of Ruby.

OPTIONS

     --version	    Prints the version of erb.

     -E external[:internal]
     --encoding external[:internal]
		    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.

     -P 	    Evaluates lines starting with % as Ruby code and removes the tailing EOLs.

     -S level	    Specifies the safe level in which eRuby script will run.

     -T mode	    Specifies trim mode (default 0).  mode can be one of

			  0	  EOL remains after the embedded ruby script is evaluated.

			  1	  EOL is removed if the line ends with %>.

			  2	  EOL is removed if the line starts with <% and ends with %>.

			  -	  EOL is removed if the line ends with -%>.  And leading whitespaces are removed if the erb directive starts with
				  <%-.

     -U 	    can be one of Sets the default value for internal encodings (Encoding.default_internal) to UTF-8.

     -d
     --debug	    Turns on debug mode.  $DEBUG will be set to true.

     -h
     --help	    Prints a summary of the options.

     -n 	    Used with -x.  Prepends the line number to each line in the output.

     -v 	    Enables verbose mode.  $VERBOSE will be set to true.

     -x 	    Converts the eRuby script into Ruby script and prints it without line numbers.

EXAMPLES

     Here is an eRuby script

	   <?xml version="1.0" ?>
	   <% require 'prime' -%>
	   <erb-example>
	     <calc><%= 1+1 %></calc>
	     <var><%= __FILE__ %></var>
	     <library><%= Prime.each(10).to_a.join(", ") %></library>
	   </erb-example>

     Command
	   % erb -T - example.erb
     prints

	   <?xml version="1.0" ?>
	   <erb-example>
	     <calc>2</calc>
	     <var>example.erb</var>
	     <library>2, 3, 5, 7</library>
	   </erb-example>

SEE ALSO

     ruby(1).

     And see ri(1) documentation for ERB class.

REPORTING BUGS

     o	 Security vulnerabilities should be reported via an email to security@ruby-lang.org.  Reported problems will be published after being
	 fixed.

     o	 Other bugs and feature requests can be reported via the Ruby Issue Tracking System (http://bugs.ruby-lang.org).  Do not report security
	 vulnerabilities via this system because it publishes the vulnerabilities immediately.

AUTHORS

     Written by Masatoshi SEKI.

UNIX
								 November 15, 2012							      UNIX

Linux and UNIX Man Pages

irb(1) [osx man page]

Check Out this Related Man Page