You mean to say you *don't* have ```js var undefined = [].forEach(Array.prototype.forEach.call); ```
at the top of every file!? On Friday, 16 October 2015, Niloy Mondal <niloy.monda...@gmail.com> wrote: > > That'd be a compatibility break. > > Ugh... you mean people actually depend on `forEach` returning `undefined` > (which it always does) to do further task? > > I wonder what that kinda code would look like >.< > > On Fri, Oct 16, 2015 at 6:08 PM, Frankie Bagnardi <f.bagna...@gmail.com > <javascript:_e(%7B%7D,'cvml','f.bagna...@gmail.com');>> wrote: > >> That'd be a compatibility break. >> >> If we end up getting :: though: >> >> ```js >> function logEach(){ >> this.forEach((x) => console.log(x)); >> return this; >> } >> >> >> const a = [1, 2, 3] >> .map(square) >> ::logEach() >> .map(plus1) >> .reduce(add); >> ``` >> >> You could make that a global variable so you can sprinkle it around your >> code in development. >> >> Having some developer tools in the language would be nice though. I don't >> even think console.log is in the spec. A global like Debug.logThis for >> example would be a more general ::-able. >> >> >> On Fri, Oct 16, 2015 at 5:32 AM, Andrea Giammarchi < >> andrea.giammar...@gmail.com >> <javascript:_e(%7B%7D,'cvml','andrea.giammar...@gmail.com');>> wrote: >> >>> ```js >>> const a = [1, 2, 3] >>> .map(square) >>> .map(x => console.log(x) || x ) >>> .map(plus1) >>> .reduce(add); >>> ``` >>> >>> Regards >>> >>> >>> On Fri, Oct 16, 2015 at 10:13 AM, Niloy Mondal <niloy.monda...@gmail.com >>> <javascript:_e(%7B%7D,'cvml','niloy.monda...@gmail.com');>> wrote: >>> >>>> Currently, `Array.prototype.forEach` returns `undefined`. It would be >>>> more >>>> useful if it returns the array itself. >>>> >>>> Say I have written some code like this... >>>> >>>> ```js >>>> const a = [1, 2, 3] >>>> .map(square) >>>> .map(plus1) >>>> .reduce(add); >>>> ``` >>>> >>>> For some reason, I am not getting the expected output. For debugging, I >>>> would >>>> like the print the values after each step. My first initial reaction is >>>> to >>>> put a `forEach` step in between and print the values like so... >>>> >>>> ```js >>>> const a = [1, 2, 3] >>>> .map(square) >>>> .forEach(x => console.log(x)) >>>> .map(plus1) >>>> .reduce(add); >>>> ``` >>>> >>>> Unfortunately, this does not work as `forEach` returns `undefined`. I >>>> now have >>>> to comment out all the code below it. Having the _plug and play_ >>>> behaviour for >>>> `forEach` would be very convenient. >>>> >>>> _______________________________________________ >>>> es-discuss mailing list >>>> es-discuss@mozilla.org >>>> <javascript:_e(%7B%7D,'cvml','es-discuss@mozilla.org');> >>>> https://mail.mozilla.org/listinfo/es-discuss >>>> >>>> >>> >>> _______________________________________________ >>> es-discuss mailing list >>> es-discuss@mozilla.org >>> <javascript:_e(%7B%7D,'cvml','es-discuss@mozilla.org');> >>> https://mail.mozilla.org/listinfo/es-discuss >>> >>> >> >
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