NSMutableArray add object with order

Question

I have a NSMUtableArray which has elements, for example:

a,b,c,e

And I want to add an object d to behind c and befor

Answer 1

To inject element to known index (position) use

- (void)insertObject:(id)anObject atIndex:(NSUInteger)index

http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSMutableArray_Class/Reference/Reference.html

And to find position of object previously placed into NSMutableArray use

- (int)indexOfObject:(id)anObject

NSMutableArray - Get Arrays Index Integer By Searching With A String

Section Finding Objects in an Array
http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSArray_Class/NSArray.html