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If you want to be a bit more thorough, you could do something like
use File::Spec::Functions( rel2abs canonpath ); my $full_inpath = canonpath( rel2abs( $infile ) ); my $full_outpath = canonpath( rel2abs( $outfile ) ); if ( $full_inpath eq $full_outpath ) { ... }
Yes, there are ways to fool this. Ideally, there would be some is_same_real_file() in File::Spec that would take into account symlinks, case sensitivity, volume names, and the like.

My criteria for good software:
  1. Does it work?
  2. Can someone else come in, make a change, and be reasonably certain no bugs were introduced?

In reply to Re^4: Perl Best Practices book: is this one a best practice or a dodgy practice? by dragonchild
in thread Perl Best Practices book: is this one a best practice or a dodgy practice? by eyepopslikeamosquito

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