Free Knowledge Resources


Linux Manual Pages


Free Software * Books

Source Code

Free Media

Linux

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.



Opportunity


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.



Free Software


Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.



Free Books


The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.



Education


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.


birds banner