Access to unnamed array in Array.forEach

Question

Is there any way to access the target object's length property when using the forEach loop over an unnamed array?

# I'd like to be able to do something like:
[1, 2, 3].forEach (n, i) -> console.log n is < (arr.length - 1)

Well, it's a constant array, so you know the length. In this example, it's 3. What do you need it for? — daniel kullmann
– daniel kullmann, Commented Aug 24, 2011 at 7:15
@daniel kullmann, the question also applies for code like getSomething().forEach ... — Arnaud Le Blanc
– Arnaud Le Blanc, Commented Aug 24, 2011 at 11:35

Arnaud Le Blanc · Accepted Answer · 2011-08-24 15:41:19Z

6

The callback of Array.forEach takes tree arguments: value, index, and the array being traversed.

So you can do that:

[1, 2, 3].forEach (n, i, thearray) -> console.log n is < (thearray.length - 1)

Javascript:

[1, 2, 3].forEach(function(n, i, thearray) {
    console.log(n < thearray.length - 1);
});

answered Aug 24, 2011 at 11:34

Arnaud Le Blanc

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1 Comment

Note to self, RTFM!