| \f |
Find a form feed character |
| \r |
Find a carriage return character |
| \t |
Find a tab character |
| \v |
Find a vertical tab character |
| \xxx |
Find the character specified by the octal number xxx |
| \xdd |
Find the character specified by the hex number dd |
| \uxxxx |
Find the unicode character specified by hex number xxxx |
| n+ |
Matches any string that contains at least one n |
| n* |
Matches any string that contains zero or more occurrences of n |
| n? |
Matches any string that contains zero or one occurrences of n |
| n{X} |
Matches any string that contains a sequence of X n's |
| n{X,Y} |
Matches any string that contains a sequence of X or Y n's |
| n{X,} |
Matches any string that contains a sequence of at least X n's |
| n$ |
Matches any string with n at the end |
| ^n |
Matches any string with n at the beginning |
| ?=n |
Matches any string that is followed by a specific string n |
| ?!n |
Matches any string that is not followed by a specific string n |