Using map when grep would do takes more code and an easy to miss trick with returning empty lists. Plus saying map gives no indication of why you have the operation. Saying grep gives a strong indication of filtering to anyone who has been near Unix or who has read perlfunc.

Therefore I would say that using map and tricky return lists is significantly less maintainable than using grep where grep would fit.

In reply to Re (tilly) 4: How do I remove an element from any array while iterating over it in a loop? by tilly
in thread How do I remove an element from any array while iterating over it in a loop? by Anonymous Monk

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