Find an object in an array by id property

gistfile1.js

var myId = 10;

var index;
var item = _.detect(this._list, function(val, indx) {
  if (val.id == myId) {
    index = indx;
    return true;
  }
}, this);

if (index) {
  console.log('Matching index is: ' + index);
  console.log('Matching item is : ' + item);
}