Using map method to find a total?
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所以假设我有一些数据。
1 2 3 4 | const cart = [ [{name:"Jose", total: 5}], [{name:"Rich", total: 10}] ] |
如何使用map或foreach合计这些合计?
How do I total up those totals using map or forEach?
The function
Array.map() is to create new arrays applying a specific handler to each element. On the other hand, the functionArray.forEach() could be a good approach to loop and sum the values.
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最好的方法是使用函数
假设该样本总是有一个带一个索引的数组。
1 2 3 4 | const cart = [[{name:"Jose", total: 5}],[{name:"Rich", total: 10}]], total = cart.reduce((a, [{total} = [obj]]) => a + total, 0); console.log(total); |