Grand Central Dispatch Isn't Just For Background Queues (Singletons in RubyMotion)
Tonight at SydInMotion I got in a discussion that lead to me explain Dispatch.once and why it’s so handy. I’ve decided to write this up as a quick tip as it’s useful in almost any application.
http://blog.motioninmotion.tv/grand-central-dispatch-isn-t-just-for-background-queues
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