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  1. or download this
    my $code = << 'EOC';
sub mySub() {
...
print qq(\ncalling 'mySub("hello world")'\n);
eval 'mySub("hello world")';
print "error: $@" if $@;
  2. or download this
    calling 'mySub()'
args: 

calling 'mySub("hello world")'
error: Too many arguments for main::mySub at (eval 3) line 2, near ""h
+ello world")