While if u need to pass only the arguments where in u will be declaring the return variable inside the function and will be returnig the value but where as when u go with context the argument options itself will change .. there we need to pass arguments as well with Resultlist which is of java type.. that carries the result of the function..
Simple UDFs uses Value, wherein we can manipulate only one value (input is one String). Therefore a single string is expected as input and the output would also b a single string.
Advanced UDFs uses Context or Queue, where you manipulate many values (input is an array of Strings).
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