How does console.log work?

Question

First Example:

In the following example: http://jsfiddle.net/maniator/ScTAW/4/
I have this js:

var storage = (function () {
    var store = [];
            


        

Answer 1

When you're calling console.log like this

console.log(storage, storage.get(), storage.add('hi there #2'));

storage.add('hi there #2') is evaluated and the return value is passed to console.log. Evaluating it causes the array item to be added to store immediately.

Same thing with storage.get() -> store. So effectively, the statement becomes:

console.log(storage, store, [return value of add which is undefined]);

When it prints, store is evaluated and its content are output which is why you see ["hi there", "hi there #2"]

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In your second example also, the anonymous function is evaluated first and the results are passed on.