[removed] how to remove duplicate arrays inside array of arrays

Question

Input:

[[-1,-1,2],[-1,0,1],[-1,-1,2],[-1,0,1],[-1,-1,2],[-1,0,1],[-1,0,1]]

The output I want:

[[-1,-1,2],[-1,0,1]]
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Answer 1

Magic

d.filter(( t={}, a=> !(t[a]=a in t) ));

I assume your input data are in array d. Explanation here.

let d = [[-1,-1,2],[-1,0,1],[-1,-1,2],[-1,0,1],[-1,-1,2],[-1,0,1],[-1,0,1]];

var r = d.filter((t={},a=>!(t[a]=a in t)));

console.log(JSON.stringify(r));