The core documentation is not always clear about the difference between lists and arrays--and much credit to the author for identifying the comma operator as an

The core documentation is not always clear about the difference between lists and arrays--and much credit to the author for identifying the comma operator as an operator--but this is really confused: By default, the arguments to a procedure are in the array context, which means that the comma operator expects both of its operands to be arrays. It promotes them to single-element arrays if they are scalars. In Perl, comma (,) can mean cons, append, flatten all at once. I wrote an explanation of context in Perl which is hopefully clearer: http://modernperlbooks.com/books/modern_perl/chapter_01.html#context http://modernperlbooks.com/books/modern_perl/chapter_01.html...