Use variable to access array results in undefined [duplicate]

Question

I am getting several arrays returned from a GET reponse, which I need to access. Since their names can change based on the request, I have a variable specifing which array to use.

However I always get undefined. See this:

            console.log(current); // trips_out_201702
            console.log(theResponse.current); // undefined
            console.log(theResponse.trips_out_201702); // this works

How can I make theResponse.current work such that it returns what current actually stands for? Why do I get undefined there?

Vincent Ramdhanie · Accepted Answer · 2017-05-24 10:09:10Z

1

When the property key in an object is a variable you can use the square bracket notation to access that property.

  console.log(theResponse[current]);

answered May 24, 2017 at 10:09

Vincent Ramdhanie

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1 Comment

ffritz Over a year ago

Thanks, that makes sense.

Arjun · Accepted Answer · 2017-05-24 10:10:06Z

1

when acessing with dynamic attribute You should do as

theResponse[current] not theResponse.current

answered May 24, 2017 at 10:10

Arjun

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Comments

Itzik.B · Accepted Answer · 2017-05-24 10:10:52Z

1

You are trying to get array value using object's way. You should try this one instant variable['keyName'] Good Luck!

answered May 24, 2017 at 10:10

Itzik.B

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