如何找到一个数组的索引并使用该索引值从另一个数组中选择值

Question

const COUNTY = ["DELHI","GUJARAT","GOA","ANDHRA"]

const COUNTY_CODE = ["001","002","003","004"]

我们有2个数组。第一个数组，我们在下拉列表中显示。我们需要根据第一个数组中选择的县来传递第二个数组中的县代码。

如何通过使用角度JS和javascript和打字稿来实现它？

Answer 1

您可以使用indexOf函数查找县的索引，然后使用它在第二个数组中查找代码。

const COUNTY = ["DELHI","GUJARAT","GOA","ANDHRA"]

const COUNTY_CODE = ["001","002","003","004"]

const selected = "DELHI";

const selectedIndex = COUNTY.indexOf(selected);

const code = COUNTY_CODE[selectedIndex];

console.log(code);