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{{boxright|__TOC__}}[[Computing]]: [[Programming]]: [[Perl]]: [[Perl built-in functions|built-in functions]]{{seed}} * '''listen'''(''socket'',''queuesize'') - waits for incoming events on a socket

| '''-S''' || Is the file a [[socket (programming)|socket]]?

[[Object-oriented programming]] is a big seller these days. Some managers would rather have [[object (OO ...array (programming)|array]], or a [[hash (programming)|hash]] [[reference (programming)|reference]]. It could even be a code reference. But because of its inher