Help for this page
print map { $_, $_, $_ } (1, 2, 3); #111222333 print map { ($_) x $_ } (1, 2, 3); #122333
print map { $_, ' ') } (1, 2, 3); #1 2 3
print map { $_ => ' ' } (1, 2, 3); #1 2 3