1. The hack author just omitted the parens. When find is predeclared (or imported in this case), these two lines are identical: 
    find  sub { ... }, $dir_name  ;
find( sub { ... }, $dir_name );

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  2. I thought that as well, but when I tried to refactor to the more efficient form (passing all directories at once), I noticed that the code in the &wanted sub needs to know the "root" directory name: $file =~ s{^\Q$incl_dir/\E}{ };. Passing all the dirs at once removes the ability to see $incl_dir.

In reply to Re^5: while following perl hack book by Util
in thread while following perl hack book by convenientstore

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