Remove duplicates in an object array Javascript

Question

I have an array of objects

list = [{x:1,y:2}, {x:3,y:4}, {x:5,y:6}, {x:1,y:2}]

And I\'m looking for an efficient way (if possible O(

Answer 1

The following will work:

var a = [{x:1,y:2}, {x:3,y:4}, {x:5,y:6}, {x:1,y:2}];

var b = _.uniq(a, function(v) { 
    return v.x && v.y;
})

console.log(b);  // [ { x: 1, y: 2 }, { x: 3, y: 4 }, { x: 5, y: 6 } ]