Name | Aliases | Description |
---|---|---|
$! | $ERROR_INFO | The exception information message set by the last 'raise' (last exception thrown). |
$@ | $ERROR_POSITION | Array of the backtrace of the last exception thrown. |
$& | $MATCH | The string matched by the last successful pattern match in this scope. |
$` | $PREMATCH | The string to the left of the last successful match. |
$' | $POSTMATCH | The string to the right of the last successful match. |
$+ | $LAST_PAREN_MATCH | The last group of the last successful match. |
$1 to $9 | The Nth group of the last successful regexp match. | |
$~ | $LAST_MATCH_INFO | The information about the last match in the current scope. |
$= | $IGNORECASE | The flag for case insensitive, nil by default (deprecated). |
$/ | $INPUT_RECORD_SEPARATOR, |
The input record separator, newline by default. |
$\ | $OUTPUT_RECORD_SEPARATOR or $ORS | The output record separator for the print and IO#write. Default is nil. |
$, | $OUTPUT_FIELD_SEPARATOR or $OFS | The output field separator for the print and Array#join. |
$; | $FIELD_SEPARATOR, |
The default separator for String#split. |
$. | $INPUT_LINE_NUMBER or $NR | The current input line number of the last file that was read. |
$< | $DEFAULT_INPUT | 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). Read only. |
$FILENAME | Current input file from |
|
$> | $DEFAULT_OUTPUT | The destination of output for Kernel.print and Kernel.printf. The default value is $stdout. |
$_ | $LAST_READ_LINE | The last input line of string by gets or readline. |
$0 | Contains the name of the script being executed. May be assignable. | |
$* | ARGV | Command line arguments given for the script. Also known as ARGV |
$$ | $PROCESS_ID, $PID or Process.pid | The process number of the Ruby running this script. |
$? | $CHILD_STATUS | The status of the last executed child process. |
$: | $LOAD_PATH | Load path for scripts and binary modules by load or require. |
$" |
|
The array contains the module names loaded by require. |
$stderr | The current standard error output. | |
$stdin | The current standard input. | |
$stdout | The current standard output. | |
$-d | $DEBUG | The status of the -d switch. Assignable. |
$-K | $KCODE | Character encoding of the source code. |
$-v | $VERBOSE | The verbose flag, which is set by the -v switch. |
$-a | True if option -a ("autosplit" mode) is set. Read-only variable. | |
$-i | If in-place-edit mode is set, this variable holds the extension, otherwise nil. | |
$-l | True if option -l is set ("line-ending processing" is on). Read-only variable. | |
$-p | True if option -p is set ("loop" mode is on). Read-only variable. | |
$-w | True if option -w is set. |
Predefined Constants:
- _FILE_ (current file)
- _LINE_ (current line)
- _dir_ (current directory)