Return value of forEach

[Andrea Giammarchi]

```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.mondal84 at 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.
>
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