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Understanding the Context

Reduce is the function to take all the elements of an array and come out with a single value out of an array. All of the above answers have explained the arr.reduce() for addition only, what if I want to perform something else with the reduce, like subtraction, multiplication etc. I have this code for a class where I'm supposed to use the reduce() method to find the min and max values in an array. However, we are required to use only a single call to reduce.

Key Insights

The return array This answer is divided in 3 parts: Defining and deciding between map and reduce (7 minutes) Using reduce intentionally (8 minutes) Bridging map and reduce with transducers (5 minutes) map or reduce Common traits map and reduce are implemented in a meaningful and consistent way on a wide range of objects which are not necessarily collections.