How to search a JSON file's key case insensititvely

Question

I have a JSON object like below,

"Data Center": {
        "TMSLevel2": {
            "Comp-NX2/4/5/6K": "NX2/4/5/6K",
            "Comp-NX3K": "NX3K",
            "Comp-NX7K": "NX7K",
            "Comp-NX9K": "NX9K",
            "Comp-ACI": "ACI"
         }
}

I named the file as map.js and import it by var map = require ('./map.js') from Node JS. I am accessing it like console.log(map["Data center"]["TMSLevel2"][name]). Now the name be "Comp-NX3K" or "Comp-NX3k" or "Comp-nx3K".

When it is "Comp-NX3K" it prints the corresponding value. But, if it is "Comp-nx3K" it prints "undefined" as there is no matching value. How to fix it ??

Answer 1

JavaScript object attributes are case sensitive, which means that JSON keys are also case sensitive. However, assuming you don't have a gargantuan list, then you could use Object.keys, Object.values, and create a lower-cased index.

var searchedFor = ("NX3K").toLowerCase(); // make sure to have them match case
var data =  {
            "Comp-NX2/4/5/6K": "NX2/4/5/6K",
            "Comp-NX3K": "NX3K",
            "Comp-NX7K": "NX7K",
            "Comp-NX9K": "NX9K",
            "Comp-ACI": "ACI"
         };
var iKeys = Object.keys(data) // this is a list of all of the attributed above (Comp-…)
               .map( // this calls a function on every member of an Array
                  function(x){ // this function returns a lower cased version of whatever
                               // value it was given
                      return x.toLowerCase();});

// iKeys is now an array of lower-cased keys.
var myValue = Object.values(data)[
                      // wherever the searched for element shows up, 
                      // will correspond to that value.
                      iKeys.indexOf(searchedFor)];

I do have to warn you, the above will only match the first instance of the key. So if there are cases of Comp-NX9K and Comp-nx9k you'll only get one.