Get array of strings by key

Question

On an Angular 7 application I have the following:

var name_key = "name";
var language_key = "language";
var type_key = "type"

Then an API returns the following JSON:

{
  "errors": {
    "language": [
      "language not found"
    ],
    "name": [
      "name not found",
      "name must not exceed 200 characters"
    ]
  }
}

I need to get the error messages for each key so that would be:

"name" > "name not found",
         "name must not exceed 200 characters"

"language" > "language not found"

"type" > NULL

How can I do this?

grreeenn · Accepted Answer · 2019-09-04 12:52:26Z

1

looks like that you need an array-like syntax allows you to access the object fields with variable keys:

const apiResponse = getApiData(); //your API response
const errorKeys = [name_key, language_key, type_key];
let errors = [];
for (let errKey of errorKeys) {
  errors.push(apiResponse.errors[errKey]);
}

P.S.: You don't usually use var keyword in typescript, because it messes with the scopes. Use let or const instead, here's why

edited Sep 4, 2019 at 12:52

answered May 4, 2019 at 21:46

grreeenn

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