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JavaScript - find object in array

3 points
Created by:
Elmer-Li
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In this article, we would like to show you how to find an object in array of objects in JavaScript.

There are three methods you can use to find object in array of objects:

  • find()
  • findIndex()
  • filter()

 

1. find() method

The find() method returns the first value in the array, if an element satisfies the provided testing function.

// ONLINE-RUNNER:browser;

const food = [
	{name: 'Apple', type: 'fruit'},
	{name: 'Broccoli', type: 'vegetable'},
 	{name: 'Banana', type: 'fruit'},
 	{name: 'Fries', type: 'fast-food'},
 	{name: 'Cherry', type: 'fruit'}
];

var result = food.find(item => item.name === 'Banana');

console.log(JSON.stringify(result, null, 4));

2. findIndex() method

The findIndex() method returns the index of the first element in the array that satisfies the provided testing function.

// ONLINE-RUNNER:browser;

const food = [
	{name: 'Apple', type: 'fruit'},
	{name: 'Broccoli', type: 'vegetable'},
 	{name: 'Banana', type: 'fruit'},
 	{name: 'Fries', type: 'fast-food'},
 	{name: 'Cherry', type: 'fruit'}
];

var result = food.findIndex(item => item.name === 'Broccoli');

console.log(JSON.stringify(result, null, 4));

3. filter() method

The filter() method creates a new array with all elements that pass the test implemented by the provided function.

Find a single object by name property:

// ONLINE-RUNNER:browser;

const food = [
	{name: 'Apple', type: 'fruit'},
	{name: 'Broccoli', type: 'vegetable'},
 	{name: 'Banana', type: 'fruit'},
 	{name: 'Fries', type: 'fast-food'},
 	{name: 'Cherry', type: 'fruit'}
];

var result = food.filter(item => item.name === 'Broccoli');

console.log(JSON.stringify(result, null, 4));

Find multiple objects by type property:

// ONLINE-RUNNER:browser;

const food = [
	{name: 'Apple', type: 'fruit'},
	{name: 'Broccoli', type: 'vegetable'},
 	{name: 'Banana', type: 'fruit'},
 	{name: 'Fries', type: 'fast-food'},
 	{name: 'Cherry', type: 'fruit'}
];

var result = food.filter(item => item.type === 'fruit');

console.log(JSON.stringify(result, null, 4));

References

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