\d in a regex isn't always equal to [0-9]Published on in JavaScript and Regular expressions
In JavaScript, \d and [0-9] are equal and match only Arabic numerals (the numbers 0–9).
But in some other languages, \d matches also non-Arabic numerals.
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Greedy quantifiers (the default, e.g. *) match as much as possible.
Lazy quantifiers (e.g. *?) match as little as possible.
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How to convert
'/foo/bar/baz/'
into an array of
'/', '/foo/', '/foo/bar/', and '/foo/bar/baz/'.
Example use case: building breadcrumb navigations.
Published on in JavaScript and Regular expressions
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E.g. how to capture overlapping pairs of letters from the string 'abcde',
i.e. 'ab', 'bc', 'cd' and 'de'.
Spoiler: with lookahead and lookbehind assertions.