Re^2: Strange Global Array issue

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Re^3: Strange Global Array issue by hdb (Monsignor) on Apr 16, 2013 at 15:01 UTC
There is only one $_ in your program and you did use it for two different purposes. One has to be careful sometimes with Perl's build-in variables. From "Modern Perl", page 7: http://onyxneon.com/books/modern_perl/modern_perl_a4.pdf As English gets confusing when you have too many pronouns and antecedents, you must take care mixing uses of $_ implicitly or explicitly. Uncautious simultaneous use of $_ may lead to one piece of code silently overwriting the value written by another. If you write a function which uses $_, you may clobber a caller function's use of $_. UPDATE: In order to make your script more robust overall, you might also want to remove $_ from your outer loop. `foreach my $regex (@regexes){ ($fileBodyMatch, $decode ) = checkFileBody ($file, $regex->{bodyre +gex}); }` [download]	[reply] [d/l]
Re^4: Strange Global Array issue by topher (Scribe) on Apr 16, 2013 at 17:39 UTC
The use of `$_` in a `foreach` doesn't add much risk or cause much reduction in the robustness of the code. `foreach`, like `map` and `grep`, will always localize `$_` within its scope. There is only the slight risk of the function mucking with `$_` (as the original poster's original function did); however, any function that uses or modifies a non-localized `$_` is broken. Christopher Cashell	[reply] [d/l] [select]