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kjkasi/block nil

Created December 25, 2015 13:54
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block nil
This macro for checking block nullability before executing them:
#define BLOCK_EXEC(block, ...) if (block) { block(__VA_ARGS__); };
Moves from this:
if (completionBlock)
{
completionBlock(arg1, arg2);
}
to:
BLOCK_EXEC(completionBlock, arg1, arg2);
source
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