On Thu, 2004-08-05 at 11:07, [EMAIL PROTECTED] wrote: > Hi All, Hi
> I am using code written by some one else. I didn't understand the difference
> between these subroutines, the way they were defined.
>
> 1. sub addToLog { Some code } Any specific reason where we should
> not use braces ??
> 2. sub displayEnv( ) { " } Any specific reason why we should
> use braces ??
> 3. sub trim($) { " } Any specific reason why we should
> use a brace with a $ sign in it ??
Those are prototypes. Basically, you use them to specify how your
subroutine is to be treated.
sub trim($), for instance, means that trim will work on a scalar.
This is useful to, instead of something such as
trim($var)
use something such as
trim $var
Also,
trim
by itself is interpreted as trim($_)
trim $var1, $var2
is the same as
trim($var1), $var2
> sub displayEnv( ) { " }
This makes displayEnv by itself (that is, with no braces) work in your
code, not munching up anything following it :-)
> Could some one specify reason when to use braces and when not to use .
> Replies are highly appreciated and thanks in advance for your help.
You're the one who has to choose, I guess :-)
> Regards
> Anand
HTH,
jac
--
José Alves de Castro <[EMAIL PROTECTED]>
http://natura.di.uminho.pt/~jac
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