How to read Object?

Question

Say i have object like

var a = {"user":
                {'average':
                           {'score':4
                           }
                }
         }

How can I read object value using its keys

Say I have user Object with me and have key "average.score" can I get the value directly?

a.user["average.score"];
//Coming as undefined
a.user["average"]["score"]
// Working as expected  : 4

I have the key of "average.score" all together with me want to get the value of score how can I do it directly without splitting the key.

@MohitBhardwaj key is coming in parameter that can't be done — Kunal Vashist, Jul 20 '17 at 06:14
any key that is dynamic can be put in square brackets. Suppose `average` key is dynamic. Then, use `a.user[average].score` — Mohit Bhardwaj, Jul 20 '17 at 06:15
Which keys are you getting in parameters? I mean what keys are fixed and which ones are dynamic? — Kamesh, Jul 20 '17 at 06:17

score -2 · Answer 1 · answered Jul 20 '17 at 06:16

-2

Use a.user["average"].score

var a = {"user":
                {'average':
                           {'score':4
                           }
                }
         }
         
         console.log(a.user["average"].score);

answered Jul 20 '17 at 06:16

JSON Derulo

9,780
7
39
56

That's no different than `a.user.average.score`. – Mohit Bhardwaj Jul 20 '17 at 06:16
Like the author said, the "average" string is dynamic. Mycode snippet is just for understandig the concept. I totally don't understand why you are downvoting my answer. – JSON Derulo Jul 20 '17 at 06:20
I did not downvote your answer. But it's incorrect. You are using a string in square brackets `"average"`. It will always look for `average` key. If `average` is a variable you should use it without quotes - `a.user[average].score`. – Mohit Bhardwaj Jul 20 '17 at 06:22

How to read Object?

1 Answers1