FInd value in array of objects using javascript

Question

Given the following:

var myArray = [
  { 
    id: "3283267",
    innerArray: ["434","6565","343","3665"]
  },
  {
    id: "9747439",
    innerArray: ["3434","38493","4308403840","34343"]
  },
  {
    id: "0849374",
    innerArray: ["343434","57575","389843","38493"]
  }
];

How would I search the objects inside myArray to determine if the string "38493" is present in the innerArray and then return a new array with the id of the object....like such:

var arrayWithIds = ["9747439", "0849374"];

Write a loop that uses currentElement.innerArray.indexOf("38493") to tell if the string is in the array and pushes currentElement.id onto the result array. — Barmar
– Barmar, Commented Nov 9, 2016 at 22:09

RomanPerekhrest · Accepted Answer · 2016-11-09 22:14:40Z

4

Simple solution using Array.forEach and Array.indexOf functions:

var search =  "38493", 
    result = [];

myArray.forEach(function(o) {
     if (o.innerArray.indexOf(search) !== -1) this.push(o.id);   
}, result);

console.log(result);  // ["9747439", "0849374"]

answered Nov 9, 2016 at 22:14

RomanPerekhrest

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Comments

madox2 · Accepted Answer · 2016-11-09 22:12:52Z

4

You can filter your array and then map ids (using ES6 syntax):

const arrayWithIds = myArray
  .filter(a => a.innerArray.includes('38493'))
  .map(a => a.id)

Here is ES5 alternative:

var arrayWithIds = myArray
  .filter(function(a) {
    return ~a.innerArray.indexOf('38493');
  })
  .map(function(a) {
    return a.id;
  })

edited Nov 9, 2016 at 22:12

answered Nov 9, 2016 at 22:09

madox2

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1 Comment

webbydevy Over a year ago

Unfortunately, I have to use ES5.

Redu · Accepted Answer · 2016-11-10 09:45:06Z

0

ES5 way, you may also do as follows.

var myArray = [
  { 
    id: "3283267",
    innerArray: ["434","6565","343","3665"]
  },
  {
    id: "9747439",
    innerArray: ["3434","38493","4308403840","34343"]
  },
  {
    id: "0849374",
    innerArray: ["343434","57575","389843","38493"]
  }
],
 searchData = "38493",
     result = myArray.reduce(function(p,c){
     	                       return ~c.innerArray.indexOf(searchData) ? (p.push(c.id),p) : p;
                             },[]);
console.log(result);

answered Nov 10, 2016 at 9:45

Redu

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