Binary "," is the comma operator. In scalar context it evaluates its left argument,
throws that value away, then evaluates its right argument and returns that value.
This is just like Cís comma operator.
In list context, itís just the list argument separator, and inserts both its
arguments into the list. These arguments are also evaluated from left to right.
Re^3: Confused as to why the "casting context" is mis-behaving