> So this style I favorite since I want to avoid creating another function:
this is like believing that `fn.bind()` won't create a different object/function ... right? Or you want to lock that function to receive one forever until you unlock it? That's the only way you could mutate the function behavior without creating a new object/function like bind would do. And since bind is at least 3X slower than fat arrow, why would you do that? On Thu, May 14, 2015 at 7:36 PM, Emanuel Allen <[email protected]> wrote: > It should allow for: > > arr.forEach(arr.push.only(1));//only return a function limiting the number > of arguments pass to it... > > But I guess this work too: > arr.forEach(e=>arr.push(e)); > > But my goal was to just: > arr.forEach(arr.push);//will not work > > So this style I favorite since I want to avoid creating another function: > arr.forEach(arr.push.only(1)); > > Even know only will return another function base on the parameter to you > pass to it. > > Still, I think it would be a great addition to the Function.prototype > object. > > JS4L > > On May 14, 2015, at 1:42 PM, Andrea Giammarchi < > [email protected]> wrote: > > `$1 => a.push($1)` > > fat arrow function shines mostly in these cases, not sure there's a need > for anything else. > > `($1, $2, $3) => a.push($2, $3)` > > Regards > > On Thu, May 14, 2015 at 5:26 PM, Emanuel Allen <[email protected]> > wrote: > >> That would be great to have an only method on Function.prototype.only >> >> It can take one to three parameters as arguments: >> -Only with using the first argument: >> >> SomeFunction.only(1); >> only allow the first argument in. It target the place holder so: >> fn.only(2) allow the two most left argument in. >> >> -Only with using the first 2 argument: >> >> SomeFunction.only(1,2); >> only allow the second argument in; the second argument target where to >> start and the first not how many to let in. So fn.only(2,3); let the third >> and fourth argument in. >> >> -Only with using all arguments placeholder: >> >> SomeFunction.only(1,2,true); >> This will denote that we start from the right and and let the second from >> last argument in >> >> The last parameter is informing if we should start left or right when >> choosing the parameters to let in. The default is false; start left to right >> >> >> Internally this could use the function's arguments object to query what >> to let in. >> >> JS4L >> >> On May 14, 2015, at 11:37 AM, Allen Wirfs-Brock <[email protected]> >> wrote: >> >> >> On May 14, 2015, at 8:19 AM, Emanuel Allen wrote: >> >> Oh yes that is correct since push will push in elements separated by >> commas... Still my original problem is that I can't simply do >> arr.push(arr2.push); but it doesn't matter since it'll also push the three >> parameters into the array as well. >> >> >> exactly, see http://www.wirfs-brock.com/allen/posts/166 >> >> >> >> Sent from my iPhone >> >> On May 14, 2015, at 10:49 AM, Erik Arvidsson <[email protected]> >> wrote: >> >> Still, the callback for forEach is called with 3 arguments; value, index >> and the array. >> >> This is clearly documented in the spec and mdn and other resources. >> >> On Thu, May 14, 2015, 10:42 Garrett Smith <[email protected]> wrote: >> >>> On 5/14/15, Emanuel Allen <[email protected]> wrote: >>> > Surprise that I can't do arr1.forEeach(arr2.push); >>> > >>> >>> Check that line more carefully. >>> >>> >>> > Will throw an error. >>> > >>> > Using bind as: >>> > >>> > push = arr2.bind(push); >>> >>> Arrays don't have a bind method. >>> -- >>> Garrett >>> @xkit >>> ChordCycles.com >>> garretts.github.io >>> personx.tumblr.com >>> _______________________________________________ >>> es-discuss mailing list >>> [email protected] >>> https://mail.mozilla.org/listinfo/es-discuss >>> >> _______________________________________________ >> es-discuss mailing list >> [email protected] >> https://mail.mozilla.org/listinfo/es-discuss >> >> >> >> _______________________________________________ >> es-discuss mailing list >> [email protected] >> https://mail.mozilla.org/listinfo/es-discuss >> >> >
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