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62 lines
3 KiB
Text
62 lines
3 KiB
Text
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# -*- mode: rdoc; coding: utf-8; fill-column: 74; -*-
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== Pre-defined variables
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$!:: The exception information message set by 'raise'.
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$@:: Array of backtrace of the last exception thrown.
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$&:: The string matched by the last successful match.
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$`:: The string to the left of the last successful match.
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$':: The string to the right of the last successful match.
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$+:: The highest group matched by the last successful match.
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$1:: The Nth group of the last successful match. May be > 1.
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$~:: The information about the last match in the current scope.
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$=:: The flag for case insensitive, nil by default.
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$/:: The input record separator, newline by default.
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$\:: The output record separator for the print and IO#write. Default is nil.
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$,:: The output field separator for the print and Array#join.
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$;:: The default separator for String#split.
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$.:: The current input line number of the last file that was read.
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$<:: The virtual concatenation file of the files given on command line (or from $stdin if no files were given).
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$>:: The default output for print, printf. $stdout by default.
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$_:: The last input line of string by gets or readline.
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$0:: Contains the name of the script being executed. May be assignable.
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$*:: Command line arguments given for the script sans args.
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$$:: The process number of the Ruby running this script.
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$?:: The status of the last executed child process.
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$::: Load path for scripts and binary modules by load or require.
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$":: The array contains the module names loaded by require.
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$DEBUG:: The status of the -d switch.
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$FILENAME:: Current input file from $<. Same as $<.filename.
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$LOAD_PATH:: The alias to the $:.
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$stderr:: The current standard error output.
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$stdin:: The current standard input.
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$stdout:: The current standard output.
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$VERBOSE:: The verbose flag, which is set by the -v switch.
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$-0:: The alias to $/.
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$-a:: True if option -a is set. Read-only variable.
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$-d:: The alias to $DEBUG.
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$-F:: The alias to $;.
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$-i:: In in-place-edit mode, this variable holds the extension, otherwise nil.
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$-I:: The alias to $:.
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$-l:: True if option -l is set. Read-only variable.
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$-p:: True if option -p is set. Read-only variable.
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$-v:: The alias to $VERBOSE.
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$-w:: True if option -w is set.
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== Pre-defined global constants
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TRUE:: The typical true value.
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FALSE:: The false itself.
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NIL:: The nil itself.
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STDIN:: The standard input. The default value for $stdin.
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STDOUT:: The standard output. The default value for $stdout.
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STDERR:: The standard error output. The default value for $stderr.
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ENV:: The hash contains current environment variables.
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ARGF:: The alias to the $<.
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ARGV:: The alias to the $*.
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DATA:: The file object of the script, pointing just after __END__.
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RUBY_VERSION:: The ruby version string (VERSION was deprecated).
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RUBY_RELEASE_DATE:: The release date string.
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RUBY_PLATFORM:: The platform identifier.
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