Consider class methods instead of globals. See:

<http://www.thotzy.com/THOTZY/Robust_Cocoa_Coding.html>

Unmentioned there is the additional advantage of lazy initialization: (composed in Mail)

+ (NSMutableDictionay *) myGlobalDict
{
static NSMutableDictionary * result = nil;
if(!result)
        {
        result = [[self myComplicatedGlobalFactoryMethod] retain]
        }
return result;
}

Caveat: Multi-threaded access may require additional precautions, depending on sequence.


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