`x+''` produces different results than ToString when `x = { toString() { return
'5'; }, valueOf() { return 10; } }`
________________________________________
From: es-discuss <[email protected]> on behalf of Brendan Eich
<[email protected]>
Sent: Tuesday, August 26, 2014 12:14
To: Claude Pache; Jeff Walden
Cc: Erik Arvidsson; [email protected]
Subject: Re: String(symbol)
Claude Pache wrote:
> Personally, I use the following expression in order to coerce a variable to a
> string:
>
> var obj = this + ''
>
> and its in-place variant:
>
> x += ''
>
> I think it'll continue to work in ES6.
Agreed, this is the correct-and-most-concise way to do it. It should
throw on symbols, that's important.
Having String(sym) not throw is a win for other reasons Arv identified,
but using String(any) to invoke ToString is verbose and fragile, because
String could be rebound :-P. Use +'' if you want ToString in the
language, I say.
/be
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