[adamk]

i haven't bought tiger yet, so i haven't had a chance to play with xcode 2.0, but i have been reading up on it. while, it seems powerful, i haven't found any evidence that it can do some things that i need to do.

i have a vector class with variables i, j, k. that should be fairly straightforward, but what if i want to find the length of the vector? is there a way to calculate that value based on the other three variables, or would it have to be explicitly set like all the other variables?

thanks, adam

[adamk]

okay, i read some more and think i have found the answer to my own question.

from http://www.cocoadevcentral.com/articles/000086.php :

Since the description of data is separate from a class implementation, you can assign multiple Entities to the same class, reducing the overall amount of code in a project. In a sense, each Entity is a different role played by NSManagedObject.

which seems to suggest that i could implement -(double)length in the class implementation and calculate it using the data stored in core data for that entity.

[insha]

Can't help you with your query. I clicked on the thread to see if you got touse Core Data and what were your impressions of it.

Anyway, all is not lost. I like your sig.