我有一個(gè)簡(jiǎn)單的函數(shù)，我試圖用 es6 重寫(xiě)它，但我沒(méi)有得到它其中 arr1 和 arr2 是不同寬度的多維數(shù)組，即 arr1[0].length != arr2[0].length 但具有相同的長(zhǎng)度f(wàn)unction conatArrAsColumns(arr1, arr2) {  //This works  var result = arr1.map(function(row, i){  return row.concat(arr2[i]);  });    //This works  var result = arr1.map((row, i) => {  return row.concat(arr2[i]);  });     //This does not work  var result = arr1.map((row) => {  return row.concat(arr2);  });  //This does not work  var result = arr1.map(row => row.concat(arr2)));  return result}我正在努力讓它發(fā)揮作用var result = arr1.map(row => row.concat(arr2)));感謝您對(duì)此提供的任何幫助