TypeError: Cannot read property '0' of undefined (Google App Script)

Question

Error:

TypeError: Cannot read property '0' of undefined (line 59)

Here is the script where such an error appears:

Line 59        if (obj_data.data[int_i].entities.urls[0].expanded_url != undefined){
Line 60          array_Expanded_url.push([obj_data.data[int_i].entities.urls[0].expanded_url]);
Line 61        } else {
Line 62         array_Expanded_url.push([""]); 
Line 63        }

The idea of if was exactly when the value was undefined, it would define in else the empty value, but this is not happening. Are there any errors in the script visibly that I can't see?

If would be easier to help you if you provided a minimal reproducible example rather than a code fragment. — Cooper
– Cooper, Commented Jun 14, 2021 at 0:11

Tanaike · Accepted Answer · 2021-06-14 00:14:39Z

1

From your error message, I thought that in that situation, urls of obj_data.data[int_i].entities.urls might not be included. So in order to avoid this, how about the following modification?

Modified script:

if (
  obj_data.data[int_i].entities.hasOwnProperty("urls") &&
  Array.isArray(obj_data.data[int_i].entities.urls) &&
  obj_data.data[int_i].entities.urls[0].expanded_url != undefined
) {
  array_Expanded_url.push([obj_data.data[int_i].entities.urls[0].expanded_url]);
} else {
  array_Expanded_url.push([""]); 
}

answered Jun 14, 2021 at 0:14

Tanaike

203k12 gold badges126 silver badges222 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Digital Farmer Over a year ago

Perfectly solved the error, thank you very much!

Collectives™ on Stack Overflow

TypeError: Cannot read property '0' of undefined (Google App Script)

1 Answer 1

Modified script:

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Modified script:

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related