漩涡型二维数组

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/**
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 * 漩涡型二维数组
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 * @param {number} col  列
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 * @param {number} row  行
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 * @returns {Array}     二维数组
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 * @example
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 * 1  2  3  4  
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 * 10 11 12 5
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 * 9  8  7  6
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 */
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function vortexMatrix(col, row) {
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    // 创建二维数组 初始值为0
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    const matrix = Array.from({ length: row }, () => Array.from({ length: col }, () => 0))
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    // 定义上下左右边界
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    let top = 0
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    let bottom = row - 1
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    let left = 0
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    let right = col - 1
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    // 定义当前位置
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    let current = 1
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    // 循环填充
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    while (current <= col * row) {
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        // 从左到右
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        for (let i = left; i <= right; i++) {
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            matrix[top][i] = current++
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        }
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        top++
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        // 从上到下
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        for (let i = top; i <= bottom; i++) {
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            matrix[i][right] = current++
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        }
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        right--
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        // 从右到左
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        for (let i = right; i >= left; i--) {
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            matrix[bottom][i] = current++
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        }
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        bottom--
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        // 从下到上
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        for (let i = bottom; i >= top; i--) {
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            matrix[i][left] = current++
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        }
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        left++
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    }
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    // 打印
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    matrix.forEach(row => {
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        console.log(row.join(' '))
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    })
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    return matrix
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}
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vortexMatrix(4, 3)

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1 2 3 4
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10 13 12 5
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9 8 7 6