groupBy与Lodash模块

Question

我使用lodash模块分组如下：

export class DtoTransactionCategory {
    categoryName: String;
    totalPrice: number;
}

GROUPBY

import { groupBy} from 'lodash';

  let result = groupBy(transactionCategoryList, (c: DtoTransactionCategory) => {
      return c.categoryName
    });

结果：

所以现在我需要像这样得到上面的数组（即totalPrice是sum的{​​{1}}）：

group

你能告诉我如何实现最后一步吗？我在这里使用let myNewArry = [{categoryName:"cat1",totalPrice: 9400}, {categoryName:"cat2",totalPrice: 600}] 。

Answer 1

let result = {
cat1: [{totalPrice: 2}, {totalPrice: 3}],
cat2: [{totalPrice: 2}, {totalPrice: 5}]
}
const totals = _.map(result, (val, key) => ({categoryName: key, totalPrice: _.sumBy(val, 'totalPrice')}))

console.log(totals)

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