puzzle, regex (screenreader-unfriendly)
So, here's a regular expression (JS flavour):
^(?=( +|\t+))\1(?:\t| )
This regex matches (at the start of a line) both "1+ spaces followed by a tab" and "1+ tabs followed by a space", but it does *not* match a sequence of just spaces or just tabs.
How does it work?
(Make sure to CW your answers please!)
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re: puzzle, regex (screenreader-unfriendly)
Believe it or not, this regex is actually extracted from a real, widely used software project :)
