lexical-scoping

Closures in Python

Hi, I've been trying to learn Python, and while I'm enthusiastic about using closures in Python, I've been having trouble getting some code to work properly: def memoize(fn): def get(key): return (False,) def vset(key, value): global get oldget = get def newget(ky): if key==ky: return...

Why does jQuery has a "window=this" at the very begining and say it would speed up references to window?

When I open jQuery's source code I find this line. var // Will speed up references to window, and allows munging its name. window = this Why and how this line will speed up? ...

Lexical scoping in C# lambda/anonymous delegates

I want to check whether a simple mathematical expression would overflow (using checked and catch(OverflowException)), but without the need to use a try-catch block every time. So the expression (not the result!) should be passed to a function checkOverflow, which then acts accordingly in case of an overflow. This is what I attempted, bu...