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erb(1) [centos man page]

ERB(1)							 Ruby Programmers 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
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 Masatoshi SEKI. UNIX
November 7, 2012 UNIX

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IRB(1)							 Ruby Programmer's 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
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 Keiju ISHITSUKA. UNIX
November 15, 2012 UNIX

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