Question

Is there a way to get one object property from the value of another property

for example (in SQL) Get id from object where object.name=”somename” ?

I need to get the id of that object, but I only know the name.

Answer 1

I will assume you are trying to do this with an array of objects, because it doesn’t make sense otherwise.

Depending on your desired browser support there is a method called filter on Array.prototype. If needed you can shim it too.

The code would end up looking something like this:

var list = ​[
    {id:1, name:'bob'},
    {id:2, name:'jim'},
    {id:3, name:'sam'},
    {id:4, name:'tim'}
];

var sams = list.filter(function(obj){
    return obj.name == 'sam';
});

console.log(sams[0].id);

Here is a jsfiddle link: http://jsfiddle.net/g8rTA/