The original Regex website was tragically lost in the GoDaddy purge of 2016. An abbreviated version is below:
The Regex program allows you to use perl-style extended regular expressions anywhere on your computer. Here are some examples of usage…
You can fix all occurrences of a certain misspelling, preserving the capitalization of the first letter (this example uses the regex “ignorecase” option,
i, and the “global” option,
You can substitute with the “quoted” feature (note the
sq instead of
s at the beginning), so that no special characters need to be escaped (useful for simple find-and-replace operations that don’t need special regex features):
Note: For the “quoted” feature, the regex delimiters may not be escaped either, so you MUST pick a unique character for them (e.g.
s@\qquad 2/3@\quad 2/3@ ), or in the case of brackets, have proper nesting. The
s regex options are not available, but the
i option is still available!
You can save regular expressions under a keyword…
…and then whip them out later:
You can perform the classic “translate” operation with the “tr” keyword:
Note that a green checkmark will appear to indicate when the expression you’ve typed is valid.