How to find the key on javascript object

Question

const shortCode = {
  DA: ['934', '986', '879'],
  BA: ['914', '926', '849'],
  AD: ['911', '900', '899']
};

How to get the Key on that shortcode Object. Let say I have '879' value and search for the corresponding key?

In Javascript.

Possible duplicate of How to get a key in a JavaScript object by its value? — Tedinoz
– Tedinoz, Commented Nov 22, 2018 at 5:47

slider · Accepted Answer · 2018-11-22 04:11:49Z

2

You can use find on Object.keys of shortCode:

const shortCode = {
  DA: ['934', '986', '879'],
  BA: ['914', '926', '849'],
  AD: ['911', '900', '899']
};

const res = Object.keys(shortCode)
                  .find(k => shortCode[k].includes('879'));
              
console.log(res);

answered Nov 22, 2018 at 4:11

slider

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Comments

LDS · Accepted Answer · 2018-11-22 04:21:53Z

0

 <script>
        const shortCode = {
            DA: ['934', '986', '879'],
            BA: ['914', '926', '849'],
            AD: ['911', '900', '899']
        };
        var f = '879';
        for (var k in shortCode) {
           
            if (typeof shortCode[k] !== 'function') {
                var arr = shortCode[k];
                for (var i = 0; i < arr.length; i++) {
                    if (arr[i] == f) {
                        alert('key = ' + k);
                    }
                }
                
            }
        }
    </script>

answered Nov 22, 2018 at 4:21

LDS

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