31 lines
495 B
Markdown
31 lines
495 B
Markdown
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---
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title: Spiral matrix
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---
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# Spiral matrix
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---
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## Solutions
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<details><summary>Solution 1 (Click to Show/Hide)</summary>
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```javascript
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function spiralArray(n) {
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var arr = Array(n),
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x = 0, y = n,
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total = n * n--,
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dx = 1, dy = 0,
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i = 0, j = 0;
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while (y) arr[--y] = [];
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while (i < total) {
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arr[y][x] = i++;
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x += dx; y += dy;
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if (++j == n) {
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if (dy < 0) { x++; y++; n -= 2 }
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j = dx; dx = -dy; dy = j; j = 0;
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}
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}
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return arr;
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}
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```
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</details>
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