How are javascript object capital keys?

Question

Does anyone know how to do this ?:

var obj = [{key1: value1,key2: value2},{key3: value3,key4: value4}];

at

var obj = [{key1: value1,key2: value2},{key3: value3,key4: value4}];

Answer 1

Loop using delete and replace:

var obj = [{key1: 1,key2: 1},{key3: 1,key4: 1}];
for(var i = 0; i<obj.length;i++) {

    var a = obj[i];
    for (var key in a) {
        var temp; 
        if (a.hasOwnProperty(key)) {
          temp = a[key];
          delete a[key];
          a[key.charAt(0).toUpperCase() + key.substring(1)] = temp;
        }
    }
    obj[i] = a;

}

Answer 2

use the lodash _.capitalize function

_.capitalize('firstName') => FirstName