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03.17.2008 at 12:17PM PDT, ID: 23248126
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What does _ do?

Asked by PurpleSlade in Perl Programming Language

I was investigating perl file test operators and found this program on the web:

foreach (@ARGV) {
  next unless -f;
  $fileSize = -s _;
  print("$_ is $fileSize bytes long.\n");
}

My question is - what is the purpose of the "$fileSize = -s _"?  Specifically what is the underscore meant to accomplish?  I ran it with just "$fileSize = -s" and it returns the same results.Start Free Trial
[+][-]03.17.2008 at 02:52PM PDT, ID: 21146508

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[+][-]03.17.2008 at 03:31PM PDT, ID: 21146834

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[+][-]03.17.2008 at 03:43PM PDT, ID: 21146952

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About this solution

Zone: Perl Programming Language
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Solution Provided By: ozo
Participating Experts: 1
Solution Grade: A
 
 
[+][-]03.17.2008 at 04:05PM PDT, ID: 21147180

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