forEach on an Array

Question

I'm a little baffled. For some reason this won't work:

[1, 2, 3].forEach(function(num) {
  console.log(num)
})

I get this error:

TypeError: Cannot call method 'forEach' of undefined

However, this will:

var nums = [1, 2, 3]

nums.forEach(function(num) {
  console.log(num)
})

Anyone have any idea what's going on here?

What's the output of Array.prototype.forEach right before the first statement? Does it output a function? — Jorge Silva
– Jorge Silva, Commented Aug 29, 2014 at 18:43
Oh, YEAH! It seems (at least in your fiddle) to be interpreting that you are setting your foo variable to [1,2,3]. var foo = 'bar' [1, 2, 3].forEach(function(num) { console.log(num) }) — Jorge Silva
– Jorge Silva, Commented Aug 29, 2014 at 18:51

daryl · Accepted Answer · 2014-08-29 18:55:32Z

1

So, it turns out it was because I'm not using semicolons, and the preceding code conflicted.

var foo = 'bar'

[1, 2, 3].forEach(function(num) {
  console.log(num)
})

answered Aug 29, 2014 at 18:55

daryl

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Comments

tmruss · Accepted Answer · 2014-08-29 18:41:54Z

0

and in version v0.10.26 of node.js. Perhaps this is a platform issue?

answered Aug 29, 2014 at 18:41

tmruss

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