Hey guys I need some Programming help

"Cherry_man1" (Cherry_man1) 12/02/2014 at 14:13 • Filed to: Programming

2

2

I am doing the #1 on this thing and its stumping me.

Any insight?

Language python: 3.4.1

!!!error: Indecipherable SUB-paragraph formatting!!!

Have a ford GT for help.

mattc993 > Cherry_man1 12/02/2014 at 14:21

2

Assuming you want to return the non-orange (non-favorite colors) to the bottom of the stack, something like this will be your eatFavoriteCandy method:

currentPez = self.s.pop()

if currentPez != "Orange"
self.s.push(currentPez)

else
return

That's probably not code complete or syntactically correct, but hopefully you get the idea? The fact that the example is a pez dispenser is not coincidental. Think of how one works in real life, and you have the concept of a stack in CS. Push items to the bottom, or pop them off the top.

Redline > mattc993 12/02/2014 at 15:45

0

That's not how a stack works in CS. You both put/push or take/pop items from the same end of the stack. You are thinking of a FIFO queue. Stacks operate via LIFO, Last In First Out.

To solve problem number 1 you can exploit the code in the displayContents method. Create a new stack (like s2), pop everything out of the self.s stack containing the candy onto the new stack s2 unless it is orange.

In pseudocode:

s2 = LinkedStack()
while self.s stack is not empty
currentPez = self.s.pop()
if currentPez != "Orange"
s2.push(currentPez)
#now candy is stored in stack s2 in the reverse order. Move it back to original stack
while not s2.isEmpty()
self.s.push(s2.pop())