I see Array.contains as a great idea. This is an operation I use constantly when I write code and it'd be nice to have it be a first class Array operation. Sure it's not so different than indexOf, but the semantics are much more intuitive and it may very well be the more common operation.
-Greg On Fri, Dec 30, 2011 at 6:29 PM, Rick Waldron <waldron.r...@gmail.com>wrote: > That's what I figured - I guess I thinking of implementations that would > be ES3 & 5 compat > > Thanks! > > > On Fri, Dec 30, 2011 at 6:26 PM, Brendan Eich <bren...@mozilla.com> wrote: > >> Jason doesn't want a wrapper written in JS that depends on the current >> value of this.indexOf, I think. That's enough reason for a built-in. This >> is a no-brainer for ES6 IMHO. >> >> /be >> >> ----- Original Message ----- >> From: "Rick Waldron" <waldron.r...@gmail.com> >> To: "Jason Orendorff" <jason.orendo...@gmail.com> >> Cc: "es-discuss" <es-discuss@mozilla.org> >> Sent: Friday, December 30, 2011 2:28:28 PM >> Subject: Re: Array.prototype.contains >> >> >> >> On Fri, Dec 30, 2011 at 5:24 PM, Jason Orendorff < >> jason.orendo...@gmail.com > wrote: >> >> >> >> On Fri, Dec 30, 2011 at 6:58 AM, Xavier MONTILLET >> < xavierm02....@gmail.com > wrote: >> > http://wiki.ecmascript.org/doku.php?id=harmony:string_extras >> > There is a proposal for String.prototype.contains so why can't I find >> > one for Array.prototype.contains? >> >> No kidding. I need this method every time I write ECMAScript code. >> What I want is like: >> >> Object.defineProperty(Array.prototype, "contains", { >> configurable: true, >> writable: true, >> value: function contains(x) { >> return this.indexOf(x) !== -1; >> } >> }); >> >> except without the property lookup for indexOf. >> >> >> >> At this.indexOf ? Or the whole "this.indexOf(x) !== -1;" lookup? How else >> could it work? >> >> >> Rick >> >> >> >> -j >> >> >> _______________________________________________ >> es-discuss mailing list >> es-discuss@mozilla.org >> https://mail.mozilla.org/listinfo/es-discuss >> >> >> _______________________________________________ >> es-discuss mailing list >> es-discuss@mozilla.org >> https://mail.mozilla.org/listinfo/es-discuss >> > > > _______________________________________________ > es-discuss mailing list > es-discuss@mozilla.org > https://mail.mozilla.org/listinfo/es-discuss > >
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