In what situation would storing in an array different data types be useful in Javascript?

Question

I have been learning some javascript recently and found out that you can store different data types in an array like this:

var myArray = [12, 23.5, "hello", true]; 

I have some Java background and this is not possible in Java as you would have to declare the data type otherwise you would get an error (int myArray = blah blah blah)

So my question is, in what situations would you use this instead of an object for example. Examples would be great. Thanks.

Answer 1

This is the case in any language that is not strongly typed. Your array members can be of different primitive and they also can be objects. In most cases you wouldn't want to use this because there is no clear structure to your array. You would rather have something like:

var data = {
    prop: 12,
    otherProp: 24.5,
    stringProp: "hello",
    boolProp: true
};