Assalam-o-Alakum :- I do not understand two important concept of classes one is "pass be value" and the other is "pass by reference". so if anyone explain these two with example, I am very thankful to him/her. thanks.
Check out the Campfire Stories here at the Ranch, especially the one on this very topic. Remember that there is a lot of useful stuff outside the saloon, even though some of the "bar flies" in here may have forgotten