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---
id: 594810f028c0303b75339ad8
title: 之字形矩阵
challengeType: 5
videoUrl: ''
dashedName: zig-zag-matrix
---
# --description--
“zig-zag”数组是第一个$ N ^ 2 $整数的正方形排列,当数组沿着数组的[反对角线](https://en.wiktionary.org/wiki/antidiagonal)曲折时,数字会逐渐增加。例如,给定“'5”',产生这个数组:
```
0 1 5 6 14
2 4 7 13 15
3 8 12 16 21
9 11 17 20 22
10 18 19 23 24
```
编写一个采用Z字形矩阵大小的函数并将相应的矩阵作为二维数组返回。
# --hints--
ZigZagMatrix必须是一个功能
```js
assert.equal(typeof ZigZagMatrix, 'function');
```
ZigZagMatrix应该返回数组
```js
assert.equal(typeof ZigZagMatrix(1), 'object');
```
ZigZagMatrix应该返回一个nestes数组的数组
```js
assert.equal(typeof ZigZagMatrix(1)[0], 'object');
```
ZigZagMatrix1应返回\[[0]]
```js
assert.deepEqual(ZigZagMatrix(1), zm1);
```
ZigZagMatrix2应返回\[[0,1][2,3]]
```js
assert.deepEqual(ZigZagMatrix(2), zm2);
```
ZigZagMatrix5必须返回指定的矩阵
```js
assert.deepEqual(ZigZagMatrix(5), zm5);
```
# --seed--
## --after-user-code--
```js
const zm1 = [[0]];
const zm2 = [[0, 1], [2, 3]];
const zm5 = [
[0, 1, 5, 6, 14],
[2, 4, 7, 13, 15],
[3, 8, 12, 16, 21],
[9, 11, 17, 20, 22],
[10, 18, 19, 23, 24]
];
```
## --seed-contents--
```js
function ZigZagMatrix(n) {
return [[], []];
}
```
# --solutions--
```js
function ZigZagMatrix(n) {
const mtx = [];
for (let i = 0; i < n; i++) {
mtx[i] = [];
}
let i = 1;
let j = 1;
for (let e = 0; e < n * n; e++) {
mtx[i - 1][j - 1] = e;
if ((i + j) % 2 === 0) {
// Even stripes
if (j < n) j++;
else i += 2;
if (i > 1) i--;
} else {
// Odd stripes
if (i < n) i++;
else j += 2;
if (j > 1) j--;
}
}
return mtx;
}
```