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)

Answer 1

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);
});