如何从其他数组的数字位置获取数组

Question

我有一个数组A = [1,3]，它存储来自另一个数组B = ["answer1","answer2","answer3","answer4"]的正确答案的位置。我需要得到一个数组C，它将由正确的答案组成，类似于["answer1","answer3"]。

示例：如果数组A由1个元素组成(例如A = [2](，则数组C应类似于C = ["answer2"]。

当我有一个由1个元素组成的数组A时，我可以用indexOf()解决这个问题。但当有2个或更多元素时，我会陷入

Answer 1

您应该执行以下操作：

let A = [1,3];
let B = ["answer1","answer2","answer3","answer4"];
let C = A.map(i => B[i-1]);