> 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 <[email protected]> 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 < > [email protected]> 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 <[email protected]> >> 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 >>> [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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