On Wednesday, October 10, 2012 at 6:19 AM, gaz Heyes wrote:
> This wasn't totally unexpected but seriously made me go WTF. It appears that
> arguments to regexp.test are cast to a string. This was bad for me since I
> was writing a js parser at the time and checking the argument to see if it
> matched one of the reserved words. See the example below:-
>
> if(/^(?:undefined|ok|wtf|js)$/.test(undefined)){
> alert('WTF');
> } else {
> alert('NO WTF');
> }
This is by design and surely not a wtf. test() is specified to accept and
operate on a string argument and therefore coerces it's arg to a string.
This is very common throughout ES
Rick
>
> That's pretty much all I got but if you didn't go WTF then I apologise for
> the wasted thread.
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