Get single object from array using JavaScript functions [duplicate]

Question

I have this array of objects:

var frequencies = [{id:124,name:'qqq'}, {id:589,name:'www'}, {id:45,name:'eee'}, {id:567,name:'rrr'}]; 

I need to get an object from the array above by the id value.

For example I need to get the object with id = 45.

I tried this:

var t = frequencies.map(function (obj) { return obj.id==45; }); 

But I didn't get the desired object.

How can I implement it using JavaScript prototype functions?

Answer 1

If your id's are unique you can use find()

var frequencies = [{"id":124,"name":"qqq"},{"id":589,"name":"www"},{"id":45,"name":"eee"},{"id":567,"name":"rrr"}]; var result = frequencies.find(function(e) { return e.id == 45; }); console.log(result)

Answer 2

You need filter() not map()

var t = frequencies.filter(function (obj) { return obj.id==45; })[0];