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I use the same thing to construct NSDecimalNumber instances. N(100.5) instead of [NSDecimalNumber decimalNumberFromString:@"100.5"]

SO handy.

You can do this now @(100.5) for NSNumber literals.

And even shorter, just @100.5 if what you have is a literal. The parentheses are needed if you're boxing a value, e.g.: @(price + 100.5)