Thanks very much to you and all those who clarified the ternary if to me. However, what is meant by the C in C<?:>? Is that shorthand for some concept?
Comment on Re^2: Ternary if versus normal if question
It's the pod format of Perl documentation. Apart that, it is also used in ASCII contexts to visually mark code, but I generally avoid it here since whe have <code> tags anyway. In this situation, however, it seemed to me to be too be too short and confusing, so I added that pseudo-markup.