Re^2: Backdating strict

The inverse is true too.

If you've got a long script and you don't feel ready to convert the whole thing over to strict, you can switch it on for a particular sub:

sub do_stuff {
  use strict;
  ...;
}
[download]

If your script is working fine as-is, leave it alone. If you notice a bug in a sub or need to add a new feature to a sub, then switch on strict for just that sub while you're making your improvements, and then leave it on for that sub. Over time, more and more of your script will become strict. Once most of the file seems to be strict, then making the whole file strict will be a much smaller task.

toby döt ink

Comment on Re^2: Backdating strict Download Code

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Re^3: Backdating strict by Bod (Parson) on Nov 19, 2020 at 17:14 UTC
That does sound like the best way forward for me...enforce `strict` initially one subroutine at a time then one lexical block at a time until the complete code unit has strictures enforced. Quick question... If I have `use strict;` followed by a `require` statement in the same block, does the code that is brought in by the `require` have strict applied to it - my guess is yes as it is in the same lexical block. I can't test it right now as I am using my mobile and AFAIK there isn't a version of Perl for Android.	[reply] [d/l] [select]
Re^4: Backdating strict by jcb (Parson) on Nov 20, 2020 at 02:49 UTC
No, code brought in with use or require is its own top-level lexical scope. Explained differently, lexical scopes do not cross file boundaries in Perl; the loading mechanism is not a preprocessor. If this were not so, the common convention of making `use strict;` the first statement in a script would also apply `strict` to all library modules, but this does not happen.	[reply] [d/l] [select]
Re^4: Backdating strict by marto (Cardinal) on Nov 19, 2020 at 17:55 UTC
I've not used this in a while, perhaps worth checking out.	[reply]
Re^5: Backdating strict by Bod (Parson) on Nov 19, 2020 at 18:02 UTC
Thanks marto - that looks rather interesting!	[reply]
Re^5: Backdating strict by Bod (Parson) on Nov 20, 2020 at 15:46 UTC
I was right...it is very interesting and now I have a newer version of Perl - 5.32 on my mobile than I do on my laptop or webserver!!! Somehow that doesn't seem quite right but some things are best left unquestioned :) Thanks for the information marto	[reply]
Re^3: Backdating strict by Bod (Parson) on Nov 30, 2020 at 23:01 UTC
then switch on strict for just that sub while you're making your improvements I suppose that `use strict;` makes the reset keyword obsolete.	[reply] [d/l]
Re^4: Backdating strict by tobyink (Canon) on Dec 02, 2020 at 01:23 UTC
I can't recall having ever used `reset`. toby döt ink	[reply] [d/l]
Re^5: Backdating strict by Bod (Parson) on Dec 02, 2020 at 18:49 UTC
I can't recall having ever used `reset` I used to regularly use reset at the end of loops to clear variables that were just being used in that loop - but now I use `my` instead which, I believe, is better practice.	[reply] [d/l] [select]
Re^4: Backdating strict by LanX (Saint) on Dec 01, 2020 at 04:55 UTC
No. Cheers Rolf _{(addicted to the Perl Programming Language :) Wikisyntax for the Monastery}	[reply]


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