From: Minseok Choi <eraser95@...>
Date: 2008-04-18T08:40:12+09:00
Subject: Re: When are lambdas needed?

Stedwick wrote:
> I have seen many tutorials on the Internet explaining where lambdas
> CAN be used, such as clever multiplication functions, but when are
> they actually NEEDED?
> 
> Sure, I can take a lambda and "pass it around" so to speak, but I can
> call a function from anywhere too, right?
> 
> Can somebody give me an extremely useful, NOT complicated, example of
> when lambdas are the absolute perfect solution to a problem?
> 
> Thanks!

lambda is like a function pointer in c/c++.
Let me give you an example.

hello = lambda { "Hello" }
hello.call
=> "Hello"
hello = lambda { "World" }
hello.call
=> "World"

HTH,
Minseok Choi