PEP 3107 -- Function Annotations described the specification, defining the grammar changes, the existence of func.annotations in which they are stored and, the fact that it's use case is still open. In Python 3.5 though, PEP 484 -- Type Hints attaches a single meaning to this: -> is used to indicate the type that the function returns.
$ = function() { alert('I am in the $ function'); } JQuery is a very famous JavaScript library and they have decided to put their entire framework inside a function named jQuery. To make it easier for people to use the framework and reduce typing the whole word jQuery every single time they want to call the function, they have also created an alias for it. That alias is $. Therefore $ is the ...
javascript - What does $ (function () {} ); do? - Stack Overflow
Actually, the above function will be treated as function expression without a name. The main purpose of wrapping a function with close and open parenthesis is to avoid polluting the global space.
What these functions do is that when the function is defined, The function is immediately called, which saves time and extra lines of code (as compared to calling it on a seperate line).
What is the (function () { } ) () construct in JavaScript?
I had some experience lately with function pointers in C. So going on with the tradition of answering your own questions, I decided to make a small summary of the very basics, for those who need a...
The difference is that functionOne is a function expression and so only defined when that line is reached, whereas functionTwo is a function declaration and is defined as soon as its surrounding function or script is executed (due to hoisting). For example, a function expression: