$ ReadAPipe3.pl
This was read from the pipe:
<>

These are the list of parameters:
<>


$ ReadAPipe3.pl 1 2 3
This was read from the pipe:
<>


These are the list of parameters:
<1 2 3>


$ echo abc | ReadAPipe3.pl 1 2 3
This was read from the pipe:
<abc>

These are the list of parameters:
<1 2 3>


$ (sleep 3; echo abc ) | ReadAPipe3.pl 1 2 3
This was read from the pipe:
<abc>

These are the list of parameters:
<1 2 3>


$ echo abc | ReadAPipe3.pl
This was read from the pipe:
<abc>

These are the list of parameters:
<>


$ sleep 3 | ReadAPipe3.pl 1 2 3
This was read from the pipe:
<>

These are the list of parameters:
<1 2 3>