ruby

Interpreted object-oriented scripting language

Options

Name	Description
`--copyright`	Prints the copyright notice
`--version`	Prints the version of Ruby interpreter
`-0 <octal>`	Specifies the input record separator ($/) as an octal number
`-C <directory>`	Causes Ruby to switch to the directory
`-F <pattern>`	Specifies input field separator ($;)
`-I <directory>`	Used to tell Ruby where to load the library scripts. Directory path will be added to the load-path variable ($:)
`-K <kcode>`	Specifies KANJI (Japanese) encoding
`-S`	Makes Ruby use the PATH environment variable to search for script, unless its name begins with a slash. This is used to emulate #! on machines that don't support it, in the following manner: #! /usr/local/bin/ruby # This line makes the next one a comment in Ruby \ exec /usr/local/bin/ruby -S $0 $*
`-T <level>`	Turns on taint checks at the specified level (default 1)
`-a`	Turns on auto-split mode when used with -n or -p
`-c`	Causes Ruby to check the syntax of the script and exit without executing. If there are no syntax errors, Ruby will print “Syntax OK” to the standard output
`-d, --debug`	Turns on debug mode. $DEBUG will be set to true
`-e <command>`	Specifies script from command-line while telling Ruby not to search the rest of arguments for a script file name
`-h, --help`	Prints a summary of the options
`-i [extension]`	Specifies in-place-edit mode. The extension, if specified, is added to old file name to make a backup copy
`-l`	Enables automatic line-ending processing, which means to firstly set $\ to the value of $/, and secondly chops every line read using chop!
`-n`	Causes Ruby to assume the following loop around your script
`-p`	Acts mostly same as -n switch, but print the value of variable $_ at the each end of the loop
`-r <library>`	Causes Ruby to load the library using require
`-s`	Enables some switch parsing for switches after script name but before any file name arguments (or before a --)
`-v, --verbose`	Enables verbose mode
`-w`	Enables verbose mode without printing version message at the beginning. It sets the $VERBOSE variable to true
`-x <directory>`	Tells Ruby that the script is embedded in a message. Leading garbage will be discarded until the first that starts with “#!” and contains the string, “ruby”. Any meaningful switches on that line will applied. The end of script must be specified with either EOF, ^D (control-D), ^Z (control-Z), or reserved word __END__. If the directory name is specified, Ruby will switch to that directory before executing script
`-y, --yydebug`	Turns on compiler debug mode. Ruby will print a bunch of internal state messages during compiling scripts. You don't have to specify this switch, unless you are going to debug the Ruby interpreter