August 2011
Intermediate to advanced
552 pages
23h 48m
English
Content preview from Advanced Mac OS X Programming: The Big Nerd Ranch GuideBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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GCD or NSOperation?
You have now seen two different ways of architecting your code to support task-oriented parallelism, NSOperation and Grand Central Dispatch.
With GCD, the code for a particular operation tends to be concentrated in one place. You have a block that does work and then puts blocks onto other queues to do other work – the whole “layers of an onion” thing. GCD is very fast. There is little baggage associated with it. There is no reliance on KVO. GCD calls tend to be more ad-hoc and disposable, “I’ll just put this here to run this on the main queue” kinds of things. Plus, it is easier to copy and paste and create similar blocks doing the same work.
NSOperation tends to have the code more spread around. The code implementing an ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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