按对象值排列位置

Question

我想创建一个按特定键的值对数组进行排序的函数。

我会举个例子。

[{ text: 'hi', author: 'Boy' },
{ text: 'how are you', author: 'Boy' },
{ text: 'I\'m good', author: 'Boy' },
{ text: 'hello', author: 'Girl' },
{ text: 'Bye', author: 'Boy' }]

在上面的数组中，'Girl' author 比 'Boy' author 多，所以它应该返回以下数组

[{ text: 'hello', author: 'Girl' },
{ text: 'hi', author: 'Boy' },
{ text: 'how are you', author: 'Boy' },
{ text: 'I\'m good', author: 'Boy' },
{ text: 'Bye', author: 'Boy' }]

第二个例子：

[{ text: 'hi', author: 'Boy' },
{ text: 'hola', author: 'Mom' },
{ text: 'how are you', author: 'Boy' },
{ text: 'I\'m good', author: 'Boy' },
{ text: 'hello', author: 'Girl' },
{ text: 'eat this', author: 'Mom' },
{ text: 'Bye', author: 'Boy' }]

第二个结果：

[{ text: 'hello', author: 'Girl' },
{ text: 'hola', author: 'Mom' },
{ text: 'eat this', author: 'Mom' },
{ text: 'hi', author: 'Boy' },
{ text: 'how are you', author: 'Boy' },
{ text: 'I\'m good', author: 'Boy' },
{ text: 'Bye', author: 'Boy' }]

最后一个例子：

const data = [
  { text: 'hi', author: 'Boy' },
  { text: 'hola', author: 'Mom' },
  { text: 'hola', author: 'Mom' },
  { text: 'hola', author: 'Mom' },
  { text: 'how are you', author: 'Boy' },
  { text: "I'm good", author: 'Boy' },
  { text: 'hello', author: 'Girl' },
  { text: 'eat this', author: 'Mom' },
  { text: 'Bye', author: 'Boy' }
]

最后的结果（我不在乎男孩是第一个还是妈妈是第一个

const data = [
  { text: 'hello', author: 'Girl' },
  { text: 'hola', author: 'Mom' },
  { text: 'hola', author: 'Mom' },
  { text: 'hola', author: 'Mom' },
  { text: 'eat this', author: 'Mom' },
  { text: 'hi', author: 'Boy' },
  { text: 'how are you', author: 'Boy' },
  { text: "I'm good", author: 'Boy' },
  { text: 'Bye', author: 'Boy' }
]

Answer 1

这里是这个问题的解决方案。您可以使用此函数使用任何属性对其进行排序。

console.clear();
const data = [{ text: 'hi', author: 'Boy' },
{ text: 'hola', author: 'Mom' },
{ text: 'how are you', author: 'Boy' },
{ text: 'I\'m good', author: 'Boy' },
{ text: 'hello', author: 'Girl' },
{ text: 'eat this', author: 'Mom' },
{ text: 'Bye', author: 'Boy' }];

const sortBy = (value, data) => {
  let sortedData = [];
  const countValueObj = data.reduce((acc, obj) => {
    const authorValue = obj[value];
    if(!acc[authorValue]) acc[authorValue] = 1;
    else acc[authorValue]++;
    return acc;
  }, {})
  const countValueArr = Object.keys(countValueObj).sort((a, b) => countValueObj[a] - countValueObj[b]);
  countValueArr.forEach((val) => {
    const filteredData = data.filter((obj) => obj[value] === val);
    sortedData = [...sortedData, ...filteredData];
  })
  return sortedData;
}

const output = sortBy('author', data);

console.log(output)

Answer 2

您可以按author 分组并按计数对键进行排序并获得一个新的对象数组。

var array = [{ text: 'hi', author: 'Boy' }, { text: 'hola', author: 'Mom' }, { text: 'how are you', author: 'Boy' }, { text: 'I\'m good', author: 'Boy' }, { text: 'hello', author: 'Girl' }, { text: 'eat this', author: 'Mom' }, { text: 'Bye', author: 'Boy' }],
    temp = array.reduce((r, o) => {
        if (!r[o.author]) r[o.author] = [];
        r[o.author].push(o);
        return r;
    }, {}),
    result = Object
        .keys(temp)
        .sort((a, b) => temp[a].length - temp[b].length)
        .flatMap(k => temp[k]);

console.log(result);

.as-console-wrapper { max-height: 100% !important; top: 0; }

Answer 3

如果您修改数据集并向其添加计数，则以下代码应该可以完成这项工作。

var data = [{ text: 'hi', author: 'Boy' },
{ text: 'hola', author: 'Mom' },
{ text: 'how are you', author: 'Boy' },
{ text: 'I\'m good', author: 'Boy' },
{ text: 'hello', author: 'Girl' },
{ text: 'eat this', author: 'Mom' },
{ text: 'Bye', author: 'Boy' }];

// add counts against each object
data.forEach(obj => {
  obj['count'] = data.filter((obj1) => obj1.author === 
    obj.author).length;
})

// user Array.sort function to sort your data
data.sort(function(a, b){
    if(a.count < b.count) return -1;
    if(a.count > b.count) return 1;
    return 0;
});

不过，如果你从后端得到这个列表会更好。

Answer 4

你可以使用

array.sort((a, b) => {
  return a.author - b.author;
})