things that look different

[Scott Penrose]

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On Wednesday, Oct 8, 2003, at 00:28 Australia/Melbourne, Michael 
Stillwell wrote:

> On the topic of things that look different but do (almost?) the same 
> thing, is there ever any reason to prefer one of these over the other:
>
> my $v1 = do {
>   1;
> };
>
> my $v2 = sub {
>   1;
> }->();
>
> ?

I guess it is just execution time. I would prefer the first...

It is clearer to the next programmer if they see...

	do = Execute now
	sub = Keep for later

Of course you can do the sub { ... }->() but that is just ugly (as you 
said) and adds some confusion.

On the other hand it is always good to know how something works. You 
can see now how a do {} can be created from a sub {} :-)

Scott

> (The sub approach lets you do an actual return, which does suit the 
> construction, but the "}->();" bit sure is ugly...)
>
>
>
>
> --M.
>
> -- 
> http://beebo.org
>
>
>
>
>
>
> -- 
> http://beebo.org
>
>
>
>
- -- 
Scott Penrose
Welcome to the Digital Dimension
http://www.dd.com.au/
scottp at dd.com.au

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