if it's about iterating you have forEach which does not iterate over non assigned indexes ... this looks like you want a new feature with an ES5 method as filter is so that you can use an ES3 for loop after ...
I mean, you have forEach, map, etc to iterate valid indexes, why would you need that? On Mon, Nov 12, 2012 at 1:24 PM, Asen Bozhilov <[email protected]>wrote: > Hi, > > Array.prototype.filter could be used to convert sparse to dense array, e.g. > > [1,,,,,2,,,,,3].filter(Boolean.bind(null, true)); //[1, 2, 3] > > Would be pretty straightforward if built-in filter could be called without > callback function and returns a dense array. > I guess the engines will optimize that and library authors could > gracefully iterate over index properties of arrays without checking for > existance. > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > >
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