Get the value from objects in JavaScript

Question

I was inspecting some code through Firebug's debugger. The value I found is wrapped in this.executions. So when I print the value of temp

var temp = this.executions;
console.log(temp);

I am getting output as

[Object { context="1461223497558",  value1="TEST1",  value2="TEST2"}]

I tried using a for...in loop

for(var key in temp) {
  var value = temp[key];
}

Though then I am still getting output like

Object { context="1461223497558",  value1="TEST1",  value2="TEST2"}

I want to extract the values TEST1 and TEST2 of the variables value1 and value2 key. Any idea how to get them?

Because you have an array of objects, you need to use 2 loops to get each key and value. If you are sure that the array will have only 1 item then var temp = this.executions[0]; — Arun P Johny
– Arun P Johny, Commented Apr 21, 2016 at 8:25

mimiz · Accepted Answer · 2016-04-21 08:33:03Z

3

Iterate over keys :

var keys  = Object.keys(temp[0]); // As your first temp var is an array
keys.forEach(function(key){
 console.log(key +" : " +temp[key]);
});

Or first iterate on executions :

this.executions.forEach(function(temp){ // loop over executions
    var keys  = Object.keys(temp);
    keys.forEach(function(key){ // loop over keys
     console.log(key +" : " +temp[key]);
    });
});

this will outpout

context : 1461223497558
value1 : TEST1
...

So now you can do what you want with your data

edited Apr 21, 2016 at 8:33

answered Apr 21, 2016 at 8:27

mimiz

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1 Comment

Ruhan Konduru Over a year ago

Hey thanks for your solution...it worked,sorry i don't have enough reputation otherwise i could have upvoted this answer....

Sebastian Zartner · Accepted Answer · 2016-04-21 09:53:42Z

0

Note that your first output

[Object { context="1461223497558",  value1="TEST1",  value2="TEST2"}]

is an array of objects indicated by the square brackets around the object.

Therefore you first need to loop over that array (e.g. by using your for...in loop) and then access the properties of the current object:

for(var key in temp) {
  var object = temp[key];
  console.log(object.value1, object.value2);
}

answered Apr 21, 2016 at 9:53

Sebastian Zartner

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1 Comment

Ruhan Konduru Over a year ago

Thanks a lot @Sebastian

Andy · Accepted Answer · 2016-04-21 10:01:57Z

0

filter the object values that start with 'TEST' (ES6):

var obj = arr[0];
var out = Object.keys(obj).filter(el => obj[el].substring(0, 4) === 'TEST');

DEMO

Or perhaps a more general function (this time ES5):

function extractValues(obj, str) {
  return Object.keys(obj).filter(function(el) {
    return obj[el].substring(0, str.length) === str;
  });
}

extractValues(obj, 'TEST'); // ['TEST1', 'TEST2']

DEMO

edited Apr 21, 2016 at 10:01

answered Apr 21, 2016 at 9:03

Andy

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1 Comment

Ruhan Konduru Over a year ago

Thanks a lot @Andy

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