TA貢獻(xiàn)1806條經(jīng)驗(yàn) 獲得超5個(gè)贊
function circle(array) {
return array.length < 2 ? array[0] : array.shift().concat(
array.map(e=>e.pop()),
circle(array.map(e=>e.reverse()).reverse())
);
}
// test
circle([[1,2,3,4],[5,6,7,8],[9,10,11,12]]);
TA貢獻(xiàn)1825條經(jīng)驗(yàn) 獲得超4個(gè)贊
function printMatrix(matrix) {
if (matrix == null || matrix.length == 0) {
return;
}
var rows = matrix.length;
var cols = matrix[0].length;
var start = 0;
var result = [];
while (cols > start * 2 && rows > start * 2) {
var endX = cols - 1 - start;
var endY = rows - 1 - start;
//從左到右打印一行
for (var i = start; i <= endX; i++) {
result.push(matrix[start][i]);
}
//從上到下打印一列
if (start < endY) {
for (var i = start + 1; i <= endY; i++) {
result.push(matrix[i][endX]);
}
}
//從右到左打印一行
if (start < endX && start < endY) {
for (var i = endX - 1; i >= start; i--) {
result.push(matrix[endY][i]);
}
}
//從下到上打印一列
if (start < endX && start < endY - 1) {
for (var i = endY - 1; i >= start + 1; i--) {
result.push(matrix[i][start]);
}
}
start++;
}
return result
}
TA貢獻(xiàn)1779條經(jīng)驗(yàn) 獲得超6個(gè)贊
var test = function (matrix) {
var x, y, border = [x = y = 0, matrix.length - 1], result = [];
while (x <= border[1] || y <= border[1]) {
result.push(matrix[y][x]);
if (y == border[0] && x < border[1]) x++;
else if (x == border[1] && y < border[1]) y++;
else if (y == border[1] && x > border[0]) x--;
else if (x == border[0] && y > border[0]) y--;
if (x == border[0] && y == border[0]) {
y = x = ++border[0];
border[1]--;
}
}
return result;
}
TA貢獻(xiàn)1876條經(jīng)驗(yàn) 獲得超6個(gè)贊
原答案
var nums = "1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16";
var arr = nums.split(',');
for(var i in arr){
i-=0;
if(i>0&&(i+1)%4==0){
var str = arr.slice(i-3,i+1).join(' ');
console.log(str)
}
}
我理解錯(cuò)誤了
TA貢獻(xiàn)1836條經(jīng)驗(yàn) 獲得超3個(gè)贊
var arr = [
[1, 2, 3, 4],
[5, 6, 7, 8],
[9, 10, 11, 12],
[13, 14, 15, 16]
]
arr.forEach(row => {
row.forEach(n => console.log(n))
})
舉報(bào)