I need to sort dates by newest.
This is sortByDate()
function - this sorting list currently will sort date by oldest date instead of newest.
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 });
};
And this is newsList which need to be sorted:
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'
}
]
Currently sortByDate
sort my data by oldest date, why he does not work as expected?
This should do what you need, sorting with the newest first. You could also pass a sortorder parameter to the sorting function to indicate the sort order you require.
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()));
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