Simple Question

[dhopp]

Could someone please explain the use of -> and => as in following example?
(A poor Windows user ... )

 $file = "/home/images/$name";
 open(IMAGE, ">$file") || die "unable to open filehandle $file \n";
 $saveres = $ua->request(HTTP::Request->new(GET => $pic));
 print IMAGE "$saveres";