Swap command from A1

[CooLiBoP]

Ok i'm re-writing my A1 URLList code the same way that it is sugeested on the 148 page (with a URLPair class etc.).  I was just wondering how they performed the swap command...Does their add method in URLList take an index?  How did they add to a specific index?  Currently my add method just creates a new URLPair object and puts it at the end of the list...is there something I'm missing here?

[1.8T]

i used setElementAt()

[CooLiBoP]

erm...I know that I can use add(index i, object b) (for an arraylist) but I was wondering about the add method in the URLList class...according to their solution they only have 1 add method which I assume adds the object to the end of the list?  So without making a new addToIndex method say, how would I do this?

[1.8T]

oh ic wut u mean,., i haven't started yet., but i think u iterate until the specified index, then add then add the rest.., .,
really haven't started so not sure.,., IM me if that works. kekeke

[Brutal_Chicken]

CooLiBoP said:

erm...I know that I can use add(index i, object b) (for an arraylist) but I was wondering about the add method in the URLList class...according to their solution they only have 1 add method which I assume adds the object to the end of the list?  So without making a new addToIndex method say, how would I do this?

The way they described it in their solution is that they used a lot of add and remove calls. I'm with you, I'm making an add method that just adds to a specific index. I mean, what if you have a large list of urls/titles? You'd have to iterate through all of them up to the ith and jth ones just to do what ArrayList and Vector already can do.

[Bahamut]

I'm sorry, but this has to be said:  1.8T, your icon is adorable!

[Brutal_Chicken]

Ok, so I wrote a remove method and a replace method for URLList bringing the total to 5 methods. I really don't wanna write a method that'll keep calling add() and remove() to swap two items. It's inefficient ain't it?

And, yes, that is so cute. What the hell is it?  

[1.8T]

Mashi Maro, some korean cartoon
u can watch the .swf here
www.plusq.com/mashimaro.html

;D ;D

anyways. back to the assignment hahaha, i'm having trouble doing the linkedlist methods for adding to an index, im not sure as to how the user inputs the index , is it through a parameter in my method?., and if so , how do i go about going through the linked list to the specified index when there isn't index values for the linked list?

[Brutal_Chicken]

You just have to use a for loop with an int index = 0 as your starting point. Just start with head.getLink() as your initial value before the for loop and you're in business. And yes, it needs to be a parameter.

[Brutal_Chicken]

Did anyone actually do the swap method the way they did? As in remove the two URLPairs at indices x and y then reshuffle the entire list from x or y (whichever was the least) swapping the two URLPairs apart in the process.

I just wrote a replace method and I'm wondering if I'm gonna get marks off... Probably will.  

[CooLiBoP]

Brutal_Chicken said:

Did anyone actually do the swap method the way they did?

I did after a bit of tweaking around with my URLList class...