How to reduce cortisol: Often I study some JavaScript interview

Often I study some JavaScript interview questions, suddenly I saw a question about usage of reduce function for sorting an Array, I read about it in MDN and the usage of it in some medium articles... What scenarios would warrant the use of the "Map and Reduce " algorithm? Is there a .NET implementation of this algorithm? The __reduce_ex__ method will be called with a single integer argument, the protocol version. On the gripping hand, Guido says that this is an area that could be cleaned up. Reduce function does not reduce anything. Reduce is the function to take all the elements of an array and come out with a single value out of an array.