iphone - Accessing NSDictionary inside NSArray -

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i have nsarray of nsdictionary. each dictionary in array has 3 keys: 'name', 'sex' , 'age'

how can find index in nsarray of nsdictionary where, example, name = 'roger'?

    nsuinteger count = [array count];     (nsuinteger index = 0; index < count; index++)     {           if ([[[array objectatindex: index] objectforkey: @"name"] isequaltostring: @"roger"])         {               return index;         }        }     return nsnotfound;

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