How to make dictionary search as case insensitive in Typescript?

Question

I have dictionary object dictionary withing TypeScript which is storing values in the following fashion:

{
  "abc": {
    "country": "Germany",
    "population": 83623528
  },
  "CDE": {
    "country": "Austria",
    "population": 8975552
  },
  "efg": {
    "country": "Switzerland",
    "population": 8616571
  }
}

I have another array tabledata which is storing values of keys as Name but the case for Name can be different within array.

Now, I am trying to search for values within dictionary using the following statement:

hostDictionary[tableData[i].Name]

It works fine when the case matches between tableData[i].Name and dictionary key

But I am getting null value when the case doesn't match.

For example,

hostDictionary[tableData[i].Name] is returning null when tableData[i].Name = "cde"

Does this answer your question? https://stackoverflow.com/questions/12484386/access-javascript-property-case-insensitively — sujeet, Apr 23 '20 at 18:05

sujeet · Answer 1 · 2020-04-23T18:37:45.623

0

You have to iterate over its keys to compare .

Keys are case-senstitive, comparing them after converting lower or upper case will cause inconsistency in your search.

If you want to get the value without minding case.

function getKey(key, obj) {
   return Object.keys(obj).find((el) => el.toLowerCase() === key.toLowerCase()) ? obj[el]: null;
}

edited Apr 23 '20 at 18:37

answered Apr 23 '20 at 18:17

sujeet

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score 0 · Answer 2 · answered Apr 23 '20 at 18:25

0

It will not be as efficient as a dictionary but this might work.

function get(key){ 
   for(let prop in hostDictionary){
     if( prop.toLowerCase() == key.toLowerCase())
        return hostDictionary[prop];
     }
}

answered Apr 23 '20 at 18:25

Redet Getachew

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score -2 · Answer 3 · answered Apr 23 '20 at 18:06

-2

Just use toUppercase on each side of the comparison https://www.w3schools.com/jsref/jsref_touppercase.asp

const A = 'Asdf'
const B = 'asdf'

A === B // false
A.toUpperCase() === B.toUpperCase() // true

answered Apr 23 '20 at 18:06

Odinn

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How to make dictionary search as case insensitive in Typescript?

3 Answers3