A Practical Example of FlatMap
The Swift standard library introduces some unfamiliar concepts if you’re coming from Obj-C and Cocoa. map is one thing, but for some, flatMap seems a bridge too far. It’s a question of taste, and of background, if something comes across as a well-chosen, expressive phrase or if it just seems like status signaling, high-falutin’ bullshit. Well, I’m not going to sort that all out, but I did find mys
Leak-Free Recursive Blocks
Sometimes, you want a block to be able to call itself. That means it needs a reference to itself. And that means you have a wonderful opportunity to create a strong reference cycle that will endure till the end of time, or at least till your app exits. The Solution __weak __block block_t recurse; block_t block; recurse = block = ^(id val) { … recurse(subval); … } Getting There The prototypical rec
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