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"];

• Barmar: 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.

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;
 })

• webbydevy: Unfortunately, I have to use ES5.

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);