Re: When -w and use strict aren't enough...

There is a way to do what you want, but you probably don't want to do it. Here goes:

my $handleNewYear = sub {
    # do something really useful
};

# ... lotsa logic...
if (1==$mday && 1==$month) {
    $handelNewYear->();
}
[download]

All that I have done is stored the subroutine in a variable. Do that with all of your subroutines and all of your typos in subroutines become typos in variable names which strict.pm catches.

You may note that I also reversed the order of your == comparisons. The reason for doing that is so that if you type = instead of == some day, Perl will complain because you can't assign to a constant. This is a useful habit in many C-like languages.

Comment on Re: When -w and use strict aren't enough... Download Code

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Re: Re: When -w and use strict aren't enough... by greenFox (Vicar) on Nov 07, 2003 at 15:17 UTC
I read this thread earlier today and I have to admit that I skimmed over the bit about == comparisons and then just now I was reading about the back door attempt on the Linux kernel and way down there in the comments (sorry I can't see a way to link directly to it) are two comments by "legobuff" and "Mr_Z" on the exact same topic. A real world example how a simple change in coding practice can potentially make a profound difference (presuming of course some-one writes the auditing tools). ++tilly its a good meme to spread. -- Do not seek to follow in the footsteps of the wise. Seek what they sought. -Basho	[reply]
Re^2: When -w and use strict aren't enough... by andyford (Curate) on Jun 15, 2006 at 21:56 UTC
This intrigues me. but Why do you say "Probably don't want to..."? because "it's too much work"? or because "it's dangerous/bad/ugly"?	[reply]
Re^3: When -w and use strict aren't enough... by ikegami (Patriarch) on Jun 15, 2006 at 22:24 UTC
Don't know, but one downside (upside?) is that your functions are no longer accessible from outside the package. That can easily be fixed by doing one of the following for exportable functions: `*handleNewYear = my $handleNewYear = sub { # do something really useful };` [download] `sub handleNewYear { # do something really useful } my $handleNewYear = \&handleNewYear;` [download]	[reply] [d/l] [select]
Re^3: When -w and use strict aren't enough... by tilly (Archbishop) on Jun 17, 2006 at 01:09 UTC
Because it is ugly. And will be sure to generate negative comments from any maintainance programmer. And cannot be mixed with OO techniques. Other than that, it is a veru good idea. But its goodness is simply not worth the arguments that you're bound to generate.	[reply]


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