Global Constants list
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.
RELEASE_DATE Synonym for RUBY_RELEASE_DATE. Deprecated.
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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