Grand Central Dispatch Design Patterns3. Blocks Blocks are a proposed addition to C. Like a function pointer, except it also stores the context the block was created in. Similar to closures, lambdas, and anonymous functions in other languages. 4. Blocks Declaration Syntax: returnType (^blockName) (Arguments) Blocks may be anonymous. Definition Syntax: ^ returnType (Arguments) { code; } The return type and arguments are optional. GCD pr
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