无法对二维数组中的每个数组进行排序

Question

我正在尝试使用两个排序层对一些项目进行排序。例如，我有一个带有列的列表。一列是类型，一列是年份。现在我想按类型对项目进行排序，并且所有具有相同类型的项目也必须按年份排序。

我的做法是获取所有项目的数组并对类型进行排序。 然后，我取出已排序的数组并将每个具有相同类型的项目推入一个数组中（这是一个二维数组），所以我将它们作为单独的数组。 然后，我想对2D数组中每个数组的年份进行排序。

这是我的代码：

function sortDivs(type, reverse) {

    let sortedList = items.map((e) => ({ // Map each item to a object with its element and its child element's text
        e, // element
        text: e.querySelector('.wrap.toggler .'+type).textContent, // the text to be compared
        year: e.querySelector('.wrap.toggler .'+'jahr').textContent.replace(' ', '').replace('-', '') // The year to compare

    })).sort(({text:a},{text:b}) => 

        reverse ? b.localeCompare(a) : a.localeCompare(b)

    )

    // if type 'year' no need to sort second layer
    if(type == 'jahr') return

    // Sort each duplicate type of clicked tab per year , newest top

    let currentText = sortedList[0].text

    let tmpArray = []
    let array2D = []

    // Push same items in seperate arrays of array2D
    sortedList.forEach((item, i) => { 

        if(item.text != currentText) {

            array2D.push(tmpArray)

            tmpArray = []

            currentText = item.text
        }

        if(item.text == currentText) {

            tmpArray.push(item)
        }

        if(i == sortedList.length - 1) {

            array2D.push(tmpArray)
        }
    })


    console.log('Seperated Arrays ', array2D)

    // Everything works till here... The arrays dont get sorted
    // Sort each array of array2D
    tmpArray = []

    array2D.forEach(array => {

        array.sort(({year:a}, {year:b}) =>  {

            b.localeCompare(a)

        })

    })

    console.log('seperate sorted arrays ',array2D)

    array2D.forEach(e =>  {

            console.log('final', e)

    })
}

我将所有排序类型存储在单独的数组中，这样做是有效的。但是，在循环遍历2D数组并对每个数组进行排序时，却无法生效。我得到的是未排序的数组...需要将2019放在第一位。

数组结构在屏幕截图中显示，或者在此处字符串化：

`
[
[
{"e":{"jQuery111307164768320580499":8},"text":"Fertiggestellt ","year":"2018"},
{"e":{"jQuery111307164768320580499":9},"text":"Fertiggestellt ","year":"2017"},
{"e":{"jQuery111307164768320580499":21},"text":"Fertiggestellt ","year":"2013"},
{"e":{"jQuery111307164768320580499":25},"text":"Fertiggestellt ","year":"2019"},
{"e":{"jQuery111307164768320580499":27},"text":"Fertiggestellt ","year":"2017"},
{"e":{"jQuery111307164768320580499":28},"text":"Fertiggestellt ","year":"2017"},
{"e":{"jQuery111307164768320580499":29},"text":"Fertiggestellt ","year":"2017"},
{"e":{"jQuery111307164768320580499":30},"text":"Fertiggestellt ","year":"2014"},
{"e":{"jQuery111307164768320580499":31},"text":"Fertiggestellt ","year":"2014"},
{"e":{"jQuery111307164768320580499":32},"text":"Fertiggestellt ","year":"2013"},
{"e":{"jQuery111307164768320580499":33},"text":"Fertiggestellt ","year":"2013"},
{"e":{"jQuery111307164768320580499":34},"text":"Fertiggestellt ","year":"2013"},
{"e":{"jQuery111307164768320580499":35},"text":"Fertiggestellt ","year":"2012"},
{"e":{"jQuery111307164768320580499":36},"text":"Fertiggestellt ","year":"2012"},
{"e":{"jQuery111307164768320580499":37},"text":"Fertiggestellt ","year":"2009"},
{"e":{"jQuery111307164768320580499":38},"text":"Fertiggestellt ","year":"2006"},{"e":{"jQuery111307164768320580499":39},"text":"Fertiggestellt ","year":"2005"},
{"e":{"jQuery111307164768320580499":40},"text":"Fertiggestellt ","year":"2005"},
{"e":{"jQuery111307164768320580499":41},"text":"Fertiggestellt ","year":"2001"},
{"e":{"jQuery111307164768320580499":42},"text":"Fertiggestellt ","year":"2009"}
]
,
[
{"e":{"jQuery111307164768320580499":6},"text":"im Bau ","year":"2017"},{"e":{"jQuery111307164768320580499":7},"text":"im Bau ","year":"2017"},{"e":{"jQuery111307164768320580499":26},"text":"im Bau ","year":"2011"}
],
[
{"e":{"jQuery111307164768320580499":4},"text":"in Planung ","year":"2018"},
{"e":{"jQuery111307164768320580499":5},"text":"in Planung ","year":"2018"},
{"e":{"jQuery111307164768320580499":10},"text":"in Planung ","year":"2017"}
],
[
{"e":{"jQuery111307164768320580499":20},"text":"Machbarkeitsstudie ","year":"2016"}
],
[
{"e":{"jQuery111307164768320580499":11},"text":"Wettbewerb ","year":"2019"},
{"e":{"jQuery111307164768320580499":12},"text":"Wettbewerb ","year":"2018"},
{"e":{"jQuery111307164768320580499":13},"text":"Wettbewerb ","year":"2018"},
{"e":{"jQuery111307164768320580499":14},"text":"Wettbewerb ","year":"2016"},
{"e":{"jQuery111307164768320580499":15},"text":"Wettbewerb ","year":"2017"},
{"e":{"jQuery111307164768320580499":16},"text":"Wettbewerb ","year":"2015"},
{"e":{"jQuery111307164768320580499":17},"text":"Wettbewerb ","year":"2018"},
{"e":{"jQuery111307164768320580499":18},"text":"Wettbewerb ","year":"2017"},
{"e":{"jQuery111307164768320580499":19},"text":"Wettbewerb ","year":"2016"},
{"e":{"jQuery111307164768320580499":22},"text":"Wettbewerb ","year":"2015"},
{"e":{"jQuery111307164768320580499":23},"text":"Wettbewerb ","year":"2015"},
{"e":{"jQuery111307164768320580499":24},"text":"Wettbewerb ","year":"2015"}
]
]
`

- Fluqz

---

你能发布一下你正在尝试排序的二维数组的JS结构吗？（可以使用JSON.stringified吗？） - Dehan

Answer 1

在第二个排序中，您忘记添加一个返回语句

array2D.forEach(array => {

    array.sort(({year:a}, {year:b}) =>  {

        return b.localeCompare(a)

    })

})

你也可以写成没有返回值的表达式。

array.sort(({year:a}, {year:b}) => b.localeCompare(a))

这里有一个可工作的沙盒 https://codesandbox.io/s/sorting2ds-735qm

- Dehan

---

非常好，这解决了问题。非常感谢！我不知道没有括号会自动返回值。 - Fluqz

Answer 2

尝试将排序函数更改为以下方式

    array2D = array2D.map(array => {
        return array.sort((a, b) => {
            if (Number(a.year) > Number(b.year)) {
                return -1;
            }
            return 1;
        });
    })

- Ahmed Kesha