Javascript JSON - Convert items to new array

Question

I have a javascript object converted using stringify that looks like this..

var myJSON = JSON.stringify(response);

{"0":{"trigger":17},"1":{"trigger":3},"2":{"trigger":40},"3":{"trigger":4},"4":{"trigger":19},"5":{"trigger":70},"6":{"trigger":80},"7":{"trigger":0},"8":{"trigger":0},"9":{"trigger":5},"10":{"trigger":4}}

I am trying to create an array but only of the value of trigger.

Should I loop through the response and do it that way or is there a better way like map?

Nenad Vracar · Accepted Answer · 2018-06-07 09:12:40Z

5

You can use map method on Object.values.

const json = {"0":{"trigger":17},"1":{"trigger":3},"2":{"trigger":40},"3":{"trigger":4},"4":{"trigger":19},"5":{"trigger":70},"6":{"trigger":80},"7":{"trigger":0},"8":{"trigger":0},"9":{"trigger":5},"10":{"trigger":4}}

const arr = Object.values(json).map(({trigger}) => trigger);
console.log(arr)

answered Jun 7, 2018 at 9:12

Nenad Vracar

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1 Comment

fightstarr20 Over a year ago

Thank you, this seemed like the most straightforward method. Works great

31piy · Accepted Answer · 2018-06-07 09:13:31Z

3

You may get all the values from the object using Object.values and then apply Array.map on the collection to get the values of trigger only:

const obj = {"0":{"trigger":17},"1":{"trigger":3},"2":{"trigger":40},"3":{"trigger":4},"4":{"trigger":19},"5":{"trigger":70},"6":{"trigger":80},"7":{"trigger":0},"8":{"trigger":0},"9":{"trigger":5},"10":{"trigger":4}};

const arr = Object.values(obj).map(item => item.trigger);
console.log(arr);

answered Jun 7, 2018 at 9:13

31piy

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Comments

brk · Accepted Answer · 2018-06-07 09:14:19Z

2

Use for..in to iterate over the object and push the value to trigger to another array

let data = {
  "0": {
    "trigger": 17
  },
  "1": {
    "trigger": 3
  },
  "2": {
    "trigger": 40
  },
  "3": {
    "trigger": 4
  },
  "4": {
    "trigger": 19
  },
  "5": {
    "trigger": 70
  },
  "6": {
    "trigger": 80
  },
  "7": {
    "trigger": 0
  },
  "8": {
    "trigger": 0
  },
  "9": {
    "trigger": 5
  },
  "10": {
    "trigger": 4
  }
}
let arrVal = [];

for (var keys in data) {

  arrVal.push(data[keys].trigger)
};
console.log(arrVal)

answered Jun 7, 2018 at 9:14

brk

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