Usage
Not commonly mentioned in the context of regular expressions, however the delimiter specifier can be a regular expression. In most instances split only splits on a single character. Consider the following statement:
| split /,/, $line |
This is expecting to read a Comma Separated Values file. However the following statement assumes the field separator can be either whitespace, a comma or colon and there is at least one character:
| split /[\s,:]+/, $line |