es5和es6怎么实现数组去重

	var arr = [1,2,3,1,3,4,5];
	Array.prototype.myInfo = function(){
		var newArr = [];
		for(var i=0;i<arr.length;i++){
			var a = newArr.indexOf(arr[i]);
			if(a == -1){
				newArr[newArr.length] = arr[i];
			}
		}
		return newArr;
	}
	var result = arr.myInfo();
	console.log(result);

	let arr = [1,2,1,2,3];
	let result = new Set(arr);

	console.log(result); 			
	console.log(Array.from(result));

	let arr = [1,2,1,2,3];
	let result = new Set(arr);

	console.log(result); 	
	console.log(...result); 		
	console.log([...result]); 			

	console.log([...new Set(arr)]);