A Few Topics On Design And Coding Style

A Few Cautions

Apply quotemeta() for search key.

Use access method for object not handle directly within objects. Example: To access to main.cf object, not use

$curproc->{ ... }->{ main_cf }

instead use

$curproc->main_cf();

style.

It is better not to use @EXPORT and @EXPORT_OK.

How depth of classes is allowed ? two such as String::is_japanese_string() ? At least 3, I think.