Came here to mention, yo-yo code sometimes exists as a workaround for legacy implemenations: take XML-RPC for example, and the fact that the data types that can

Came here to mention, yo-yo code sometimes exists as a workaround for legacy implemenations: take XML-RPC for example, and the fact that the data types that can be passed are limited, and int is fixed at 32-bits. What happens when you need to pass a 64-bit int? You either need to convert it to its alphanumeric string representation or convert it raw into a character array, and then convert back on the server side. Often converting to the numeric string winds up producing more readable and maintainable code.