Question

我想使用2 for循环将类似（你可以在下面找到）这样的东西绘制成一个字符串数组。

let matrix = [
  "....................",
  ".000000000000000000.",
  ".0................0.",
  ".0.00000000000000.0.",
  ".0.0............0.0.",
  ".0.0.0000000000.0.0.",
  ".0.0.0........0.0.0.",
  ".0.0.0.000000.0.0.0.",
  ".0.0.0.0....0.0.0.0.",
  ".0.0.0.0.00.0.0.0.0.",
  ".0.0.0.0.00.0.0.0.0.",
  ".0.0.0.0....0.0.0.0.",
  ".0.0.0.000000.0.0.0.",
  ".0.0.0........0.0.0.",
  ".0.0.0000000000.0.0.",
  ".0.0............0.0.",
  ".0.00000000000000.0.",
  ".0................0.",
  ".000000000000000000.",
  "....................",
]

console.log(matrix)

注意：我希望能够指定模%（相同字符的行和列的宽度，在一种情况下，在另一种情况下更大）一个更小的模式。

这是我到目前为止的代码。目前它只能从topLeft到bottomRight绘制一个“对角线”。

let matrix = [
  "00000000000000000000",
  "00000000000000000000",
  "00000000000000000000",
  "00000000000000000000",
  "00000000000000000000",
  "00000000000000000000",
  "00000000000000000000",
  "00000000000000000000",
  "00000000000000000000",
  "00000000000000000000",
  "00000000000000000000",
  "00000000000000000000",
  "00000000000000000000",
  "00000000000000000000",
  "00000000000000000000",
  "00000000000000000000",
  "00000000000000000000",
  "00000000000000000000",
  "00000000000000000000",
  "00000000000000000000",
]

for (let y=0; y<matrix.length; y++) {
  for (let x=0; x<matrix[y].length; x++) {
    if (x==y) {
      let row = matrix[y].split("")
      row[x] = ".";
      matrix[y] = row.join("")
    }
  }
}

console.log(matrix)

任何帮助都会非常感激。

Answer 1

您可以使用迭代方法检查外框并转到内部较小的框架，通过使用数组作为角点的起点进行检查。

var length = 20,
    even = Array.from({ length: length >> 2 }, (_, i) => i << 1),
    result = Array.from({ length }, (_, i) => Array.from({ length }, (_, j) =>
        even.some(v =>
            i >= v && i <= length - 1 - v && (j === v || j === length - 1 - v) ||
            (i === v || i === length - 1 - v) && j >= v && j <= length - 1 - v)
            ? '.'
            : 'x'
    ).join(' '));

document.getElementById('out').innerHTML = result.join('\n');

<pre id="out"></pre>

模式到阵列

1 个答案: