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isacjunior/reduceSumSales.js

Last active August 29, 2017 21:47
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reduceSumSales.js
const sumSales = (previusSales, nextSales) => previusSales + nextSales
const bySales = (item) => item.sales
const totalSales = users.map(bySales).reduce(sumSales)
console.log(totalSales) // 49991
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