Get JavaScript object from array of objects by value of property [duplicate]

Question

Let's say I have an array of four objects:

var jsObjects = [    {a: 1, b: 2},     {a: 3, b: 4},     {a: 5, b: 6},     {a: 7, b: 8} ]; 

Is there a way that I can get the third object ({a: 5, b: 6}) by the value of the property b for example without a for...in loop?

Answer 1

Filter array of objects, which property matches value, returns array:

var result = jsObjects.filter(obj => {   return obj.b === 6 }) 

See the MDN Docs on Array.prototype.filter()

const jsObjects = [    {a: 1, b: 2},     {a: 3, b: 4},     {a: 5, b: 6},     {a: 7, b: 8}  ]    let result = jsObjects.filter(obj => {    return obj.b === 6  })    console.log(result)

Find the value of the first element/object in the array, otherwise undefined is returned.

var result = jsObjects.find(obj => {   return obj.b === 6 }) 

See the MDN Docs on Array.prototype.find()

const jsObjects = [    {a: 1, b: 2},     {a: 3, b: 4},     {a: 5, b: 6},     {a: 7, b: 8}  ]    let result = jsObjects.find(obj => {    return obj.b === 6  })    console.log(result)