flipAndInvertImage.js

//input = array of string
//output = array of string

// test case
// [[1,1,0],[1,0,1],[0,0,0]]
// [[1,0,0],[0,1,0],[1,1,1]]

function flipAndInvertImage(array) {
  var result = [];
  //horizontal flip
  for (var i = 0; i < array.length; i++) {
    var modified = [];
    for (var j = array[i].length-1; j >= 0; j--) {
      modified.push(array[i][j]);
    }
    result.push(modified);
  }
  //inversion
  console.log('result', result);
  for (var k = 0; k < result.length; k++) {
    for (var l = 0; l < result[k].length; l++) {
      if (result[k][l] == 0) {
        result[k][l] = 1;
      } else if (result[k][l] == 1) {
        result[k][l] = 0;
      }
    }
  }
  return result; 
}

flipAndInvertImage([[1,1,0],[1,0,1],[0,0,0]]);