sort array of dictionaries by multiple critera
sort array of dictionaries by multiple critera
- Subject: sort array of dictionaries by multiple critera
- From: Martin Batholdy <email@hidden>
- Date: Wed, 27 Apr 2011 15:59:05 +0200
Hi,
I have an array of dictionaries.
One dictionary-entry looks like this:
{
ID = 34;
counter = 2;
date = "2011-04-19 15:43:52 +0200";
title = "test.pdf";
type = file;
}
Now I would like to sort my array of dictionaries first by type and then (within the type-dictionaries) by date.
I can sort my array by one critierion with a NSSortDescriptor:
NSSortDescriptor *descriptor;
descriptor = [[NSSortDescriptor alloc] initWithKey:@"date" ascending:NO];
[bookmarks sortUsingDescriptors:[NSArray arrayWithObjects:descriptor, nil]];
but how can I first "group" the dictionaries by type and then within the types sort them by date?
(so use two sorting-criteria with a different priority)
thanks for any suggestions!_______________________________________________
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