Just overwrite the file: 
open HANDLE,">","/path/to/file" or die "Cannot overwrite file: $!";
print HANDLE "Whatever";
close HANDLE;

[download]
Will clear the file when the open statement executes, so you get an "empty" file to write to.

See perldoc perlopentut.

edit: typo in print statement fixed.

"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re: empty a file by Joost
in thread empty a file by GS

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