A Brief Introduction to JavaScript Map, Filter and Reduce Methods
JavaScript Map, Reduce and Filter Functions Introduction Arrays are important Data Structures in programming. All the methods which we are going to discuss in this article will iterate over an array and return a new array based on the result function...
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Michael Geary
const sum = arr.reduce((result, item) => { result = result + item; return result; });Since
resultis local to the callback, you can simplify this to:const sum = arr.reduce((result, item) => { return result + item; });