# frozen_string_literal: true
# Include the English library file in a Ruby script, and you can
# reference the global variables such as $_ using less
# cryptic names, listed below.
#
# Without 'English':
#
# $\ = ' -- '
# "waterbuffalo" =~ /buff/
# print $', $$, "\n"
#
# With English:
#
# require "English"
#
# $OUTPUT_FIELD_SEPARATOR = ' -- '
# "waterbuffalo" =~ /buff/
# print $POSTMATCH, $PID, "\n"
#
# Below is a full list of descriptive aliases and their associated global
# variable:
#
# $ERROR_INFO:: $!
# $ERROR_POSITION:: $@
# $FS:: $;
# $FIELD_SEPARATOR:: $;
# $OFS:: $,
# $OUTPUT_FIELD_SEPARATOR:: $,
# $RS:: $/
# $INPUT_RECORD_SEPARATOR:: $/
# $ORS:: $\
# $OUTPUT_RECORD_SEPARATOR:: $\
# $INPUT_LINE_NUMBER:: $.
# $NR:: $.
# $LAST_READ_LINE:: $_
# $DEFAULT_OUTPUT:: $>
# $DEFAULT_INPUT:: $<
# $PID:: $$
# $PROCESS_ID:: $$
# $CHILD_STATUS:: $?
# $LAST_MATCH_INFO:: $~
# $IGNORECASE:: $=
# $ARGV:: $*
# $MATCH:: $&
# $PREMATCH:: $`
# $POSTMATCH:: $'
# $LAST_PAREN_MATCH:: $+
#
module English end if false
# The exception object passed to +raise+.
alias $ERROR_INFO $!
# The stack backtrace generated by the last
# exception. See Kernel.caller for details. Thread local.
alias $ERROR_POSITION $@
# The default separator pattern used by String.split. May be
# set from the command line using the -F flag.
alias $FS $;
# The default separator pattern used by String.split. May be
# set from the command line using the -F flag.
alias $FIELD_SEPARATOR $;
# The separator string output between the parameters to methods such
# as Kernel.print and Array.join. Defaults to +nil+,
# which adds no text.
alias $OFS $,
# The separator string output between the parameters to methods such
# as Kernel.print and Array.join. Defaults to +nil+,
# which adds no text.
alias $OUTPUT_FIELD_SEPARATOR $,
# The input record separator (newline by default). This is the value
# that routines such as Kernel.gets use to determine record
# boundaries. If set to +nil+, +gets+ will read the entire file.
alias $RS $/
# The input record separator (newline by default). This is the value
# that routines such as Kernel.gets use to determine record
# boundaries. If set to +nil+, +gets+ will read the entire file.
alias $INPUT_RECORD_SEPARATOR $/
# The string appended to the output of every call to methods such as
# Kernel.print and IO.write. The default value is
# +nil+.
alias $ORS $\
# The string appended to the output of every call to methods such as
# Kernel.print and IO.write. The default value is
# +nil+.
alias $OUTPUT_RECORD_SEPARATOR $\
# The number of the last line read from the current input file.
alias $INPUT_LINE_NUMBER $.
# The number of the last line read from the current input file.
alias $NR $.
# The last line read by Kernel.gets or
# Kernel.readline. Many string-related functions in the
# +Kernel+ module operate on $_ by default. The variable is
# local to the current scope. Thread local.
alias $LAST_READ_LINE $_
# The destination of output for Kernel.print
# and Kernel.printf. The default value is
# $stdout.
alias $DEFAULT_OUTPUT $>
# An object that provides access to the concatenation
# of the contents of all the files
# given as command-line arguments, or $stdin
# (in the case where there are no
# arguments). $< supports methods similar to a
# +File+ object:
# +inmode+, +close+,
# closed?, +each+,
# each_byte, each_line,
# +eof+, eof?, +file+,
# +filename+, +fileno+,
# +getc+, +gets+, +lineno+,
# lineno=, +path+,
# +pos+, pos=,
# +read+, +readchar+,
# +readline+, +readlines+,
# +rewind+, +seek+, +skip+,
# +tell+, to_a, to_i,
# to_io, to_s, along with the
# methods in +Enumerable+. The method +file+
# returns a +File+ object for the file currently
# being read. This may change as $< reads
# through the files on the command line. Read only.
alias $DEFAULT_INPUT $<
# The process number of the program being executed. Read only.
alias $PID $$
# The process number of the program being executed. Read only.
alias $PROCESS_ID $$
# The exit status of the last child process to terminate. Read
# only. Thread local.
alias $CHILD_STATUS $?
# A +MatchData+ object that encapsulates the results of a successful
# pattern match. The variables $&, $`, $',
# and $1 to $9 are all derived from
# $~. Assigning to $~ changes the values of these
# derived variables. This variable is local to the current
# scope.
alias $LAST_MATCH_INFO $~
# This variable is no longer effective. Deprecated.
alias $IGNORECASE $=
# An array of strings containing the command-line
# options from the invocation of the program. Options
# used by the Ruby interpreter will have been
# removed. Read only. Also known simply as +ARGV+.
alias $ARGV $*
# The string matched by the last successful pattern
# match. This variable is local to the current
# scope. Read only.
alias $MATCH $&
# The string preceding the match in the last
# successful pattern match. This variable is local to
# the current scope. Read only.
alias $PREMATCH $`
# The string following the match in the last
# successful pattern match. This variable is local to
# the current scope. Read only.
alias $POSTMATCH $'
# The contents of the highest-numbered group matched in the last
# successful pattern match. Thus, in "cat" =~ /(c|a)(t|z)/,
# $+ will be set to "t". This variable is local to the
# current scope. Read only.
alias $LAST_PAREN_MATCH $+