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// ES6 Set
function removeDups(arr) {
	let noDup = [...new Set(arr)];
	return noDup;
}
removeDups(["John", "Taylor", "John"]) // ["John", "Taylor"]

// Reduce
function removeDups(arr) {
	let uniq = arr.reduce((a,b) => {
      if (a.indexOf(b) < 0) a.push(b);
      return a;
    },[])
    console.log(uniq)
}
removeDups(["John", "Taylor", "John"]) // ["John", "Taylor"]