On Mon, Sep 1, 2008 at 6:39 PM, Rob Dixon <[EMAIL PROTECTED]> wrote:
> Amit Saxena wrote:
> >
> > What's the difference between "perl -w" and "use warnings" in perl ?
> >
> > If there is no difference, then the "use warnings" can be removed from
> the
> > perl programs and replace them with "perl -w".of removing "use warnings".
>
> The difference is that the pragma is lexically scoped (it affects only
> statements in the block of code where it appears) and it allows fine
> control
> over warning categories. So for instance you could write
>
> use strict;
> use warnings;
>
> my $s = 'xxx';
>
> {
> no warnings qw/substr uninitialized/;
> my $sub = substr $s, 10, 10;
> print $sub;
> }
>
> which is impossible with the command line switch, which is either on or
> off. See
>
> perldoc perllexwarn
>
> for details.
>
> And I'm wondering why you would want to remove 'use warnings' from your
> program?
>
> Rob
>
It's a requirement from the client side, according to them as only "good"
code gets submitted from development environment to the production
environment, they don't need "use warnings" and also "perl -w" as well.
It might sound strange to you, (I also got surprised when I came to know
about it), but that's the truth !
Regards,
Amit Saxena
