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"]; 

Answer 1

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"] 

Answer 2

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; }) 

Answer 3

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);