http://www.perlmonks.org?node_id=5191

Just a suggestion for a new section wherein snippets of code are posted by the monks with one small error, (hopefully an error that is common in practice). The educational challenge is for the other monks to spot and explain the subtle programming defect. After a while (hours, days ?) the original monk who posted the snippet posts the corrected code. The idea is to get the monks quick at spotting common mistakes so that they may avoid the Illusions of Maya in their everyday Perl meditations.