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"be consistent"

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I've done that! For two reasons, one good, one bad.

Bad Reason

I thought

for my $i (1..10) { # some stuff with $i }

was the same as

my $i; for $i (1..10) { # some stuff with $i }

rather than being the same as

{ my $i; for $i (1..10) { # some stuff with $i } }

because in C++, (IIRC)

for (int i=0, i<5; i++) { ... } // i in still in scope here!

I didn't do use int as shown here, but my coworkers did and I would find it misleading. Perl doesn't have that problem, but I only learned that recently.

Good Reason

This fails ('Modification of a read-only value attempted')

foreach my $var ('a', 'b') { ...something that may modify $var... print($var); }

but this doesn't

foreach ('a', 'b') { my $var = $_; ...something that may modify $var... print($var); }

In reply to Re^2: Pearls (not really) of Perl programming by ikegami
in thread Pearls (not really) of Perl programming by PetaMem

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