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English.rb
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English.rb
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# Include the English library file in a Ruby script, and you can
# reference the global variables such as \VAR{\$\_} using less
# cryptic names, listed in the following table.% \vref{tab:english}.
#
# Without 'English':
#
# $\ = ' -- '
# "waterbuffalo" =~ /buff/
# print $", $', $$, "\n"
#
# With English:
#
# require "English"
#
# $OUTPUT_FIELD_SEPARATOR = ' -- '
# "waterbuffalo" =~ /buff/
# print $LOADED_FEATURES, $POSTMATCH, $PID, "\n"
# The exception object passed to +raise+.
alias $ERROR_INFO $!
# The stack backtrace generated by the last
# exception. <tt>See Kernel.caller</tt> for details. Thread local.
alias $ERROR_POSITION $@
# The default separator pattern used by <tt>String.split</tt>. May be
# set from the command line using the <tt>-F</tt> flag.
alias $FS $;
# The default separator pattern used by <tt>String.split</tt>. May be
# set from the command line using the <tt>-F</tt> flag.
alias $FIELD_SEPARATOR $;
# The separator string output between the parameters to methods such
# as <tt>Kernel.print</tt> and <tt>Array.join</tt>. Defaults to +nil+,
# which adds no text.
alias $OFS $,
# The separator string output between the parameters to methods such
# as <tt>Kernel.print</tt> and <tt>Array.join</tt>. 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 <tt>Kernel.gets</tt> 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 <tt>Kernel.gets</tt> 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
# <tt>Kernel.print</tt> and <tt>IO.write</tt>. The default value is
# +nil+.
alias $ORS $\
# The string appended to the output of every call to methods such as
# <tt>Kernel.print</tt> and <tt>IO.write</tt>. 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 <tt>Kernel.gets</tt> or
# <tt>Kernel.readline</tt>. Many string-related functions in the
# +Kernel+ module operate on <tt>$_</tt> by default. The variable is
# local to the current scope. Thread local.
alias $LAST_READ_LINE $_
# The destination of output for <tt>Kernel.print</tt>
# and <tt>Kernel.printf</tt>. The default value is
# <tt>$stdout</tt>.
alias $DEFAULT_OUTPUT $>
# An object that provides access to the concatenation
# of the contents of all the files
# given as command-line arguments, or <tt>$stdin</tt>
# (in the case where there are no
# arguments). <tt>$<</tt> supports methods similar to a
# +File+ object:
# +inmode+, +close+,
# <tt>closed?</tt>, +each+,
# <tt>each_byte</tt>, <tt>each_line</tt>,
# +eof+, <tt>eof?</tt>, +file+,
# +filename+, +fileno+,
# +getc+, +gets+, +lineno+,
# <tt>lineno=</tt>, +path+,
# +pos+, <tt>pos=</tt>,
# +read+, +readchar+,
# +readline+, +readlines+,
# +rewind+, +seek+, +skip+,
# +tell+, <tt>to_a</tt>, <tt>to_i</tt>,
# <tt>to_io</tt>, <tt>to_s</tt>, along with the
# methods in +Enumerable+. The method +file+
# returns a +File+ object for the file currently
# being read. This may change as <tt>$<</tt> 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 $?
# A +MatchData+ object that encapsulates the results of a successful
# pattern match. The variables <tt>$&</tt>, <tt>$`</tt>, <tt>$'</tt>,
# and <tt>$1</tt> to <tt>$9</tt> are all derived from
# <tt>$~</tt>. Assigning to <tt>$~</tt> changes the values of these
# derived variables. This variable is local to the current
# scope. Thread local.
alias $LAST_MATCH_INFO $~
# If set to any value apart from +nil+ or +false+, all pattern matches
# will be case insensitive, string comparisons will ignore case, and
# string hash values will be case insensitive. 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. Thread local.
alias $MATCH $&
# The string preceding the match in the last
# successful pattern match. This variable is local to
# the current scope. Read only. Thread local.
alias $PREMATCH $`
# The string following the match in the last
# successful pattern match. This variable is local to
# the current scope. Read only. Thread local.
alias $POSTMATCH $'
# The contents of the highest-numbered group matched in the last
# successful pattern match. Thus, in <tt>"cat" =~ /(c|a)(t|z)/</tt>,
# <tt>$+</tt> will be set to "t". This variable is local to the
# current scope. Read only. Thread local.
alias $LAST_PAREN_MATCH $+