How to match a string with values in a object array? [duplicate]

Question

I have an array of objects as

array = [{"key": "English", "value": "en-ca"}, 
{"key": "French", "value": "fr-ca"}];

I am detecting the browser language using the following:

var brwsrlang = window.navigator.language;

I need to match the obtained browser language(brwsrlang) with the value in my array and return the matching string "en-ca".

For example: If my broswer language is "en-ca" it should return true or else false. I tried the following way. But, I want to make it work with the array values.

const x = brwsrlang.match( /[a-z]|-/g).join('');

This gives me the following result.

Output x=:
"en-ca"

But, I don't want to match it with all the alphabets. I just want it to check from the given array. I want to replace the regex with my array values.

Why are the objects { key: 'English', value: 'en-ca' } instead of { "english": "en-ca" }? — evolutionxbox
– evolutionxbox, Commented Apr 5, 2021 at 20:32
const inArray = array.some(language=> language.value.toLowerCase() === brwsrlang.toLowerCase()); — Gabriele Petrioli
– Gabriele Petrioli, Commented Apr 5, 2021 at 20:37

CertainPerformance · Accepted Answer · 2021-04-05 20:34:49Z

1

I'd turn the array into an object, eg into

{
  'en-ca': 'English',
  'fr-ca': 'French',
}

Ideally, do this once, in advance - eg, restructure your source code to an object of this structure.

Then just use bracket notation to look up the language on the object.

const languagesObj = Object.fromEntries(
  array.map(
    ({ key, value }) => [value, key]
  )
);
const thisLanguage = languagesObj[window.navigator.language];

answered Apr 5, 2021 at 20:34

CertainPerformance

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