Question

我需要按最新日期排序。

这是sortByDate()函数-当前此排序列表将按最早的日期而不是最新的日期对日期进行排序。

sortByDate = () => {
    const { newsList } = this.state;

    newsList.sort((a, b) => {
      const c = new Date(a.date);
      const d = new Date(b.date);
      return c - d;
    });

    this.setState({ newsList });
  };

这是新闻列表，需要对其进行排序：

hits: [
    {
      id: '14253463',
      doc_type: 'doc-test-type',
      lang: 'eng',
      author_name: 'Matt Davis',
      author_id: 'BBC Sport',
      date: '11 June 2019'
    },
    {
      id: '14253463',
      doc_type: 'doc-test-type',
      lang: 'eng',
      author_name: 'Matt Davis',
      author_id: 'BBC Sport',
      date: '10 June 2019'
    },
    {
      id: '14253463',
      doc_type: 'doc-test-type',
      lang: 'eng',
      author_name: 'Matt Davis',
      author_id: 'BBC Sport',
      date: '29 June 2019'
    }
]

当前sortByDate按最早的日期对我的数据进行排序，为什么他不能按预期工作？

Answer 1

这应该做您需要的事情，以最新的为准。您还可以将sortorder参数传递给sorting函数，以指示所需的排序顺序。

newsList = [ { id: '14253463', doc_type: 'doc-test-type', lang: 'eng', author_name: 'Matt Davis', author_id: 'BBC Sport', date: '11 June 2019' }, { id: '14253463', doc_type: 'doc-test-type', lang: 'eng', author_name: 'Matt Davis', author_id: 'BBC Sport', date: '10 June 2019' }, { id: '14253463', doc_type: 'doc-test-type', lang: 'eng', author_name: 'Matt Davis', author_id: 'BBC Sport', date: '29 June 2019' }];

console.log("Original list: ");
newsList.forEach(h => console.log(new Date(h.date).toLocaleDateString()));

newsList.sort((a, b) => {
  const c = new Date(a.date);
  const d = new Date(b.date);
  return d - c;
});
    
console.log("Sorted list: ");
newsList.forEach(h => console.log(new Date(h.date).toLocaleDateString()));

按最新日期按对象数组排序不起作用

1 个答案: