From: Arved Sandstrom <asandstrom@...>
Date: 2008-04-18T10:20:13+09:00
Subject: Re: When are lambdas needed?

"Stedwick" <philip.brocoum@gmail.com> wrote in message 
news:9568e4ae-6c60-4d8f-b460-7d9f414bcee9@l42g2000hsc.googlegroups.com...
>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!

One main use is precisely when you don't need to pass anything around - you 
need a one-off function, and probably the function isn't particularly 
complicated. Typical examples are when supplying a code block to a sort, 
group, map or filter function.

Are they needed? No. But then again, neither are subroutines or modules or 
for loops...

AHS