he/him 
@sebmck Used too much hyperbole with "very rare". Something to keep in mind if you're matching large strings as they'll be kept around.
TIL in Web ECMAScript. Has the potential to be a memory leak in a very rare scenario.pic.twitter.com/BORGQQQMhA
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@sebmck this thing is quite usefull in some cases, especially when debuging `replace()` patterns: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/n … -
@alekna_info Doesn't really justify the massive footman though.
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@sebmck This also means `RegExp`s cannot be used in parallel JS. TC39 is working on a patch to opt-out of it: https://esdiscuss.org/topic/regexps-that-don-t-modify-global-state …Thanks. Twitter will use this to make your timeline better. UndoUndo
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@sebmck it's a feature and not rare at all ;-) http://webreflection.blogspot.co.uk/2014/10/unusual-tricks-via-array-some.html#RegExp …Thanks. Twitter will use this to make your timeline better. UndoUndo
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