To be clear, this solution works perfectly if it's guaranteed that `testString` *only* contains parentheses. Otherwise you have to strip all the non-parentheses out first
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Check for balanced parentheses in a string using a regular expression? Piece of cake try { new RegExp(testString) } catch (e) { return false } return true
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If you don't strip non-parentheses out first, there are a few failure cases: (abc\) - returns false, should be true [abc)(] - returns true, should be false
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this is how JS programmers check for valid JSON
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try { eval(json) } ...
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Thanks i hate it
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the regex could also be invalid for other reasons ;-)
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wouldn't work if there's a "\)" combination, i think
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/cc
@ForbesLindesay - wish I'd thought of that in my interview.Thanks. Twitter will use this to make your timeline better. UndoUndo
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Regexes are super obscure. I usually just do: isBalanced = (t) => CSS.supports(`($${t}) or (not ())`)
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