Singletons: Pattern or Anti-pattern?

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While talking about design patterns, most developers have fumbled upon this one; especially cocoa developers (both iOS and Mac application developers). Singletons are the most common design pattern you'll come to…

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Introduction to Strategy Pattern

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In real life software development one particular challenge we developers constantly face is requirement changes. Anyone who is in the software business game knows how frequently and drastically software specification…

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Strong vs Weak Reference in Cocoa

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In iOS we always end up defining our instance variables as  @property (strong) or @property(weak). But what does strong and weak mean, and when to use which one? In cocoa,…

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