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lang-js
string.match(/best/i);.matchfor boolean comparison. It searches beyond the first result. You need to stop after first match which.testor.searchdo. Check performance here.toLowerCasewill most likely fail the Turkey Test (moserware.com/2008/02/does-your-code-pass-turkey-test.html) and similar case conversion issues. I'm not sure howReGexhandles it, but if I had to guess I'd say better.var text = "best"; var exp = new RegExp(test, "i");. This is same as/best/i.RegExp.escape()which does the trick for you.