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

One liners for ES6+

If you want to find uniq by x and y:

arr.filter((v,i,a)=>a.findIndex(t=>(t.x === v.x && t.y===v.y))===i)

If you want to find uniques by all properties:

arr.filter((v,i,a)=>a.findIndex(t=>(JSON.stringify(t) === JSON.stringify(v)))===i)