js基础---数组去重

            var numArr = [3, 4, 1, 2, 1, 1, 3, 2, 4, 3, 4];
            for (var i = 0; i < numArr.length; i++) {
                for (var j = i + 1; j < numArr.length; j++) {
                    if(numArr[i] == numArr[j]){
                        numArr.splice(j,1);
                        j--;
                    }
                }
            }
            
            console.log(numArr)