Rules for using open:

  1. Always use the 3 parameter version of open
  2. Always use locally scoped lexical file handles
  3. Always check the result

The template is:

open my $inFile, '<', $filename or die "Failed to open $filename: $!\n
+";

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Omit the newline in the die if you want to show the line number where the open failed.

True laziness is hard work

In reply to Re: concatenate directories and files into one csv by GrandFather
in thread concatenate directories and files into one csv by grashoper

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