W âbillion dollar mistakeâ http://en.wikipedia.org/wiki/Null_pointer#Null_pointer http://en.wikipedia.org/wiki/Null_pointer#Null_pointer “billion dollar mistake” null pointers Nil nil null pointer nil Null pointer address zero punteros con NULL http://en.wikipedia.org/wiki/Null_pointer#Null_pointer nulls Nil null pointers the Billion dollar mistake address zero null pointer Null Reference Mistake http://en.wikipedia.org/wiki/Null_pointer puntatore nullo NULL Null pointer http://en.wikipedia.org/wiki/Null_pointer#Null_pointer https://en.wikipedia...er#Null_pointer null pointer http://en.wikipedia.org/wiki/Null_pointer#Null_pointer http://en.wikipedia.org/wiki/Null_pointer#Null_pointer http://en.wikipedia.org/wiki/Null_pointer#Null_pointer null pointers