Global Constants list : Global Constants « Language Basics « Ruby

1. Ruby
2. Language Basics
3. Global Constants

Global Constants list

Constant            Description
ARGF                all files provided on the command line, 
                    or standard input if no files are provided. 
                    Synonym for $<.
ARGV                Array that contains all the command-line arguments. 
                    Synonym for $*.
DATA                Input stream for reading the lines of code following the _ _END_ _ directive. 
                    Not defined if _ _END_ _ is not present in code.
ENV                 Hash-like object containing the program's environment variables; can be treated as a hash.
FALSE               Synonym for false.
NIL                 Synonym for nil; 
PLATFORM            Synonym for RUBY_PLATFORM. 
                    Deprecated.
RELEASE_DATE        Synonym for RUBY_RELEASE_DATE. Deprecated.
RUBY_PLATFORM   
RUBY_RELEASE_DATE   release date of the Ruby interpreter; e.g., "2006-08-25".
RUBY_VERSION        The Ruby version; e.g., "1.8.5".
STDERR              error output stream with default value of $stderr.
STDIN               input stream with default value of $stdin.
STDOUT              output stream with default value of $stdout.
TOPLEVEL_BINDING    Binding object at Ruby's top level.
TRUE                Synonym for true; true is preferred.
VERSION             Synonym for RUBY_VERSION. Deprecated.

 

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