Javascript array showing not an array Error

Question

i have an array of object inside another object. when i iterate this array with

t.schedules.forEach(function(item) {
    console.log(item[index]);

});

it shows error Uncaught TypeError: t.schedules.forEach is not a function.

but i am able to get it with t.schedules[index];

Please post more of the code. Where does `t` get populated with respect to your `forEach`? — CertainPerformance, Aug 31 '18 at 05:27
What ever `schedules` is, it is not an array (or you're using a really old IE). — Andreas, Aug 31 '18 at 05:32
if it is not an array how it is possible to get it with index? i am getting data with t.schedules[0].. t.schedules[1] @ChanchalPrashantTapase — Neha, Aug 31 '18 at 05:46
@Neha If you create object like `var a = {1: 'Hello'};` then it will also return `Hello` with `a[1]`. But `a` is `object` not `array`. — Karan, Aug 31 '18 at 05:55
Log t.schedules not t.schedules[0] so we can see it’s structure. — Chris Cousins, Aug 31 '18 at 06:01

score 1 · Answer 1 · answered Aug 31 '18 at 06:03

1

Try like this. If t.schedules is an object then Object.values(t.schedules) will return array of values from that object. Then you can use forEach

if (typeof t.schedules == "object") {
    t.schedules = Object.values(t.schedules);
}
t.schedules.forEach(function(item) {
    console.log(item[index]);
});

answered Aug 31 '18 at 06:03

Karan

12,059
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Thank you! typeof(t.schedules) returns Object – Neha Aug 31 '18 at 06:20

score 0 · Answer 2 · answered Aug 31 '18 at 05:34

0

This sort of thing often happens if you try iterating before the array is populated. The logged object looks like a database entry judging by the "created_at", "updated_at" etc. keys so I'm guessing you are retrieving the array from a database? If so, check that you are waiting for the response before iterating.

answered Aug 31 '18 at 05:34

Code_Frank

381
1
6

yes array is populated from ajax response – Neha Aug 31 '18 at 05:40
1

That's a comment and not an answer – Andreas Aug 31 '18 at 05:41
An answer shouldn’t be speculative. Are you sure this answer is correct? – Chris Cousins Aug 31 '18 at 06:02

Javascript array showing not an array Error

2 Answers2