JavaScript一个一维数组变为两个一维数组

  
        //例如[1,2,3,4,5,6,7,8]变为[[1,2,3,4],[5,6,7,8]]
        var arr=[1,2,3,4,5,6,7,8];
        function fixedArray(arr) {
            var bigArray = [];
            var smArray = [];
            for (var i = 0; i < arr.length; i++) {
                smArray.push(arr[i]);
　　　　　　　　　　//四个一组放到新数组
                if ((i + 1) % 4 == 0 || i == arr.length - 1) {
                    bigArray.push(smArray);
                    smArray = [];
                }
            }
            return bigArray;
        }
        console.log(fixedArray(arr))