在JS中嵌套值Reduce

早上好，在array.map之后，我有一個數(shù)組，其中包含相同的賦值和一些嵌套的評級：

const assignments = [
    {
      name: "assignmentOne",
      difficultyRating: 1,
      funRating: 2
    },
    {
      name: "assignmentOne",
      difficultyRating: 3,
      funRating: 4
    },
    {
      name: "assignmentOne",
      difficultyRating: 5,
      funRating: 1
    }
]

現(xiàn)在我想得到總難度/樂趣評分，如下所示：

//Both the difficulty and fun rating in the same record
const assignmentsTotal = [
    {
      name: "assignmentOne",
      totalDifficultyRating: 9,
      totalFunRating: 7
    }
]

//Difficulty and fun rating as separate records
const assignmentsDifficultyTotal = [
    {
      name: "assignmentOne",
      totalDifficultyRating: 9
    }
]
const assignmentsFunTotal = [
    {
      name: "assignmentOne",
      totalFunRating: 7
    }
]

我很有信心最好的方法就是使用reduce方法。經(jīng)過一番挖掘之后，唯一接近我想要實現(xiàn)的是下面的文章，但是我不能讓它正常工作。有沒有一個好的方法從上面的起點開始，或者在使用reduce方法之后使用array.map創(chuàng)建單獨的數(shù)組會更好嗎？