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thegitfather/sum-reduce.js

Created September 10, 2019 09:51
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use reduce() to calc sum of some property in object[]
Raw
sum-reduce.js
calcSum = (items, prop) => {
return items.reduce((a, b) => a + b[prop], 0);
}
let foo = [{price: 1}, {price: 2}, {price: 3}];
calcSum(foo, 'price'); // 6
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