832 Flipping an Image.js

/**
 * Given a binary matrix A, we want to flip the image horizontally,
 * then invert it, and return the resulting image.
 * To flip an image horizontally means that each row of the image
 * is reversed.
 * For example, flipping [1, 1, 0] horizontally results in [0, 1, 1].
 * To invert an image means that each 0 is replaced by 1, and each 1
 * is replaced by 0. For example, inverting [0, 1, 1] results in [1, 0, 0].
 * 给定一个二进制矩阵 A，我们想先水平翻转图像，然后反转图像并返回结果。
 * 水平翻转图片就是将图片的每一行都进行翻转，即逆序。例如，水平翻转 [1, 1, 0]
 * 的结果是 [0, 1, 1]。
 * 反转图片的意思是图片中的 0 全部被 1 替换， 1 全部被 0 替换。例如，反转 [0, 1, 1]
 * 的结果是 [1, 0, 0]。
 */

/**
 * Example:
 * Input: [[1,1,0],[1,0,1],[0,0,0]]
 * Output: [[1,0,0],[0,1,0],[1,1,1]]
 * Explanation:
 * First reverse each row: [[0,1,1],[1,0,1],[0,0,0]].
 * Then, invert the image: [[1,0,0],[0,1,0],[1,1,1]]
 */

/**
 * @param {number[][]} A
 * @return {number[][]}
 */
const flipAndInvertImage = (A) => {
  const fres = []
  A.forEach((arr) => {
    const res = []
    arr.forEach((item) => {
      const temp = item === 0 ? 1 : 0
      res.unshift(temp)
    })
    fres.push(res)
  })
  return fres
}

console.log(flipAndInvertImage([[1, 1, 0], [1, 0, 1], [0, 0, 0]]))