dictionary - Are javascript object keys case sensitive?

Question

I was trying to fix duplicate items in an array on javascript by the means of object keys. The loop added 'virtual reality' and 'Virtual Reality' in the same object as different keys. Is there a way to make Javascript object not case sensitive ?

Answer 1

While object properties are strings and they are case sensitive, you could use an own standard and use only lower case letters for the access.

You could apply a String#toLowerCase to the key and use a function as wrapper for the access.

Example with a wrapper object.

function insert(key, value) {
    if (!wrapper[key.toLowerCase()]) {
        wrapper[key.toLowerCase()] = key;
    }
    data[wrapper[key.toLowerCase()]] = value;
}

var data = {},
    wrapper = {};

insert('Foo', 'bar');
console.log(data);
insert('FOO', '42');
console.log(data);