After you learn to manually do the 4-step process, then you can use a shortcut for that process that perl provides:

Its best not to use that shortcut; it has caveats, and it can be dangerous, see magic-diamond <> behavior -- WHAT?!

I would use Iterator::Diamond

Or with ARGV::readonly like Re^2: perl -pi -e s'/^\s+//'g $file

In reply to Re^2: Rewriting into file by Anonymous Monk
in thread Rewriting into file by pr09

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