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Javascript Searching an Array

The recommended way (Since ES5) is to use Array.prototype.find:

let people = [
 { name: "bob" },
 { name: "john" }
let bob = people.find(person => === "bob");
// Or, more verbose
let bob = people.find(function(person) {
 return === "bob";

In any version of JavaScript, a standard for loop can be used as well:

for (var i = 0; i < people.length; i++) {
 if (people[i].name === "bob") {




The findIndex() method returns an index in the array, if an element in the array satisfies the provided testing function. Otherwise -1 is returned.

array = [
 { value: 1 },
 { value: 2 },
 { value: 3 },
 { value: 4 },
 { value: 5 }
var index = array.findIndex(item => item.value === 3); 
var index = array.findIndex(item => item.value === 12); 




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