#javascript Array.reduce()
▻https://hackernoon.com/javascript-array-reduce-50403c421968?source=rss----3a8144eabfe3---4
How do I loathe thee? Let me count the ways…The Array.reduce() method has been around awhile. Like map(), filter() and find(), it operates upon an array of values by invoking a callback function.Here’s an example from the developer.mozilla.org site:const array1 = [1, 2, 3, 4];const reducer = (accumulator, currentValue) => accumulator + currentValue;// 1 + 2 + 3 + 4console.log(array1.reduce(reducer));// expected output: 10// 5 + 1 + 2 + 3 + 4console.log(array1.reduce(reducer, 5));// expected output: 15Seems straightforward, right? On with the grievances:0. It doesn’t do what you expectLet’s look at this again:const array1 = [1, 2, 3, 4];const reducer = (accumulator, currentValue) => accumulator + currentValue;// expected: 1 + 2 + 3 + 4 === 10Now I’ll modify the reducer function to add 1 (...)