Rick Waldron wrote: > > On Mon, Jan 2, 2012 at 3:56 PM, Mariusz Nowak < > medikoo+mozilla....@medikoo.com> wrote: > >> >> I like it, it indeed looks very logical, however it's a bit controversial >> that we need to create temporary array object to get one that we want. >> > > Is the controversy editorial or fact, because the following methods are > all > specified to use a temporary, newly initialized Array internally: > > Array.prototype.concat > Array.prototype.filter (...) >
Rick, you say that apart of output arrays this methods create some other temporary arrays internally ? I don't see anything like that in specification, where exactly is it stated ? > This doesn't produce the same as Array.prototype.repeat.. > > // regular > console.log( Array.generate( 3, [1,2,3] ) ); > // sparse > console.log( Array.generate( 3, [1,2,,3] ) ); > > [ [ 1, 2, 3 ], [ 1, 2, 3 ], [ 1, 2, 3 ] ] > [ [ 1, 2, , 3 ], [ 1, 2, , 3 ], [ 1, 2, , 3 ] ] > It is supposed to be used that way: Array.generate(4, 1, 2, 3) // -> [1, 2, 3, 1]; Usage you suggested as with Array.prototype.repeat will imply need of creating temporary array object. -- Mariusz Nowak https://github.com/medikoo ----- Mariusz Nowak https://github.com/medikoo -- View this message in context: http://old.nabble.com/Suggestion%3A-Array.prototype.repeat-tp33067649p33070367.html Sent from the Mozilla - ECMAScript 4 discussion mailing list archive at Nabble.com. _______________________________________________ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss
