如何找到一个数组的索引并将该索引值用于另一个数组中的 select 值

Question

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

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

We have 2 arrays. First array, we are showing in dropdown. We need to pass the county code from 2nd array based on the county selected in 1st array.

How to do it from using angular JS and javascript and typescript??

Answer 1

You can use indexOf function to find the index of the county and then use it to find the code in the second array.

 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);