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  1. or download this
    18:38 >perl -Mstrict -wE "foreach (my $RID) { say qq[\$RID = >$RID<]; 
+}"
Use of uninitialized value $RID in concatenation (.) or string at -e l
+ine 1.
$RID = ><

18:43 >
  2. or download this
    18:45 >perl -Mstrict -wE "foreach (my @RID) { say 'okay'; }"

18:46 >
  3. or download this
    18:46 >perl -Mstrict -wE "foreach (my @RID = (undef)) { say 'okay'; }"
okay

18:51 >