I feel that part of it relates to the popularity and ranking a lot of legacy content has, and the (often dubious) availability of old books. For people making minimum effort it's too easy just to cut and paste something old, which 'works', for various definitions of the term. Try phrasing some "How do I .... in perl?" type questions and check out the results.

In reply to Re^3: Need to print file contents on page (updated) by marto
in thread Need to print file contents on page by coolsaurabh

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