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Re: Lexical and Dynamic Scope


From: Emanuel Berg
Subject: Re: Lexical and Dynamic Scope
Date: Sun, 20 Jul 2014 21:47:30 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux)

Robert Thorpe <address@hidden> writes:

> Stefan and the Emacs maintainers added lexical scope
> because it makes Emacs Lisp faster and it's simpler
> to understand.

OK, this post made it much clearer... So lexical scope
is like in C exactly as I thought.

Dynamic scope is when you actually don't have a scope
(?) - you have a stack of variable names and when you
refer (read) to a variable name you get the latest, and
that can be put there by whoever.

But: is the stack of names global? Howcome all the Lisp
don't get crazy from other Lisp changing "its"
variables? But come to think of it, I very seldom use
variables - I use `let's, and perhaps that is both a
shield from interference and doesn't change the global
name stack?

-- 
underground experts united


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