This reminds me: I feel like the spec should've added Array.prototype[Symbol.isConcatSpreadable] (value:true, configurable:false, writable:false), and eliminated the final IsArray() test from [22.1.3.11](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-isconcatspreadable). Would've made the Array#concat() behaviour a little cleaner, in my opinion.
Unless, perhaps, the point was to leave it open and allow the end-user to monkey-patch it to false, thus finally "fixing" Array#concat() after all these years...? Was that the plan? _______________________________________________ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss
