deepintersect.js

var usedCoordinates = [ { x: 10, y: 5 }, { x: 10, y: 6 }, { x: 10, y: 7 } ];
var coordinates = [ { x: 10, y: 7 }, { x: 10, y: 8 } ];
 
// Should be [ { x: 10, y: 7 } ]
var intersection = _.select(coordinates, function(element){
  return _.any(usedCoordinates, function(otherElement){
    return _.isEqual(element, otherElement);
  });
});