name Kleine Demonstrationen zu Closures dir ftp://ftp.mathematik.uni-ulm.de/pub/vorlesungen/ws99/uxdb2/skript/counters load counters.pl load counters2.pl test test1 (echo a; echo b; echo a; echo a) | counters.pl test test2 (echo +a; echo +b; echo +a; echo -a) | counters2.pl