2 Answered Questions for the topic language theory

06/22/19

Exactly what is the difference between a "closure" and a "block"?

I've found that lots of people use the words *closure* and *block* interchangeably. Most of these people can't explain what they're talking about. I'm looking for a precise, computer science... more
Language Theory Computer Programming Theory Perl

05/24/19

The recognizing power of "modern" regexes?

What class of languages do real modern regexes actually recognise?Whenever there is an unbounded length capturing group with a back-reference (e.g. `(.*)_\\1`) a regex is now matching a non-regular... more

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