Re: Creating a dictionary who's objects are also linked or indexed?
Re: Creating a dictionary who's objects are also linked or indexed?
- Subject: Re: Creating a dictionary who's objects are also linked or indexed?
- From: Aaron Jacobs <email@hidden>
- Date: Sat, 12 Aug 2006 13:42:51 -0700
Honestly, I don't understand your first paragraph. But if it's
saying the same thing as the second one, I guess you could make a
category on NSArray with a method like itemsBetweenFirst:andSecond:
that just returns an array with the items you are looking for using
simple comparison on the receiver's own objects.
On Aug 12, 2006, at 12:00 PM, Phil wrote:
I'm curious if there is a better Cocoa solution than I've found to
the following problem: I often have a list of items (strings,
numbers, or dates) where I know the values of the first and last
items and need to iterate over the inclusive set of items that fall
between the first and last items. I can accomplish this by
effectively implementing the lookup capability of a dictionary in
an object contained in an array or by adding an index to an object
in a dictionary. It can also be handled using Core Data which
seems a lot like using a sledgehammer to swat a fly.
For example, I have a list of names and want to enumerate over the
set of items from a given item to a given item. My code determines
that "Ball" is the first value of interest and "Smith" is the last
value, and given these, I need to return the inclusive set of items
that fall between (simple alpha comparison) these values in the
parent set.
It seems like a fairly common problem and am wondering if Cocoa
provides a simpler solution that I'm not seeing?
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