用对象总结数组 [英] Sum up array with objects
本文介绍了用对象总结数组的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我将对象与以下数组组合在一起,我想总结所有出现的watt
:
I am having the following array with objects and I would like to sum up all occurrences of watt
:
let allProducts = [{
"unique_id": "102",
"currency": "$",
"price": "529.99",
"watt": 150
},
{
"unique_id": "11",
"currency": "$",
"price": "323",
"watt": 150
},
{
"unique_id": "13",
"currency": "$",
"price": "23",
"watt": 77
}
]
let getWatt =
_(allProducts)
.map((objs, key) => ({
'watt': _.sumBy(objs, 'watt')
}))
.value()
console.log(getWatt)
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.10/lodash.min.js"></script>
如您所见,我返回了一个0
值数组.但是,我想取回377
的结果值.有什么建议我做错了吗?
As you can see I get back an array of 0
values. However, I would like to get back the result value of 377
. Any suggestions what I am doing wrong?
感谢您的答复!
推荐答案
使用普通js很容易
const sum = allProducts.reduce((a, {watt}) => a + watt, 0);
console.log(sum);
<script>
let allProducts = [{
"unique_id": "102",
"currency": "$",
"price": "529.99",
"watt": 150
},
{
"unique_id": "11",
"currency": "$",
"price": "323",
"watt": 150
},
{
"unique_id": "13",
"currency": "$",
"price": "23",
"watt": 77
}
]
</script>
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