narr
i < 0
. You need the length of the array this.length
include
its includes
Array.prototype.uniq = function() {
let narr = [];
for (let i = 0; i < this.length; i++) {
if (!narr.includes(this[i])) {
narr.push(this[i]);
}
}
return narr;
}
console.log([1, 2, 2, 3, 3, 3].uniq());
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