print '(' . join( ',', @things ) . ')'; ## (1,2,3,4,5,6,7,8,9,10)

print '(' . join ',', @things . ')';;   ## (10) Whoops!

print '(', join ',', @things, ')';;   ## ( 1,2,3,4,5,6,7,8,9,10,) Double whoops!