js sort array by date string All In One

bug

const log = console.log;

const arr = [
  { title: 'markdown title', date: '2021-01-01' },
  { title: 'markdown title', date: '2022-11-01' },
  { title: 'markdown title', date: '2022-11-30' },
  { title: 'markdown title', date: '2022-12-01' },
  { title: 'markdown title', date: '2022-12-31' },
  { title: '✅ markdown title', date: '2012-01-01' }
];

// date string sort bug ❌
const sorted = arr.sort(({ date: a }, { date: b }) => {
  if (a < b) {
    return 1;
  } else if (a > b) {
    return -1;
  } else {
    return 0;
  }
});

solution

const log = console.log;

const arr = [
  { title: 'markdown title', date: '2021-01-01' },
  { title: 'markdown title', date: '2022-11-01' },
  { title: 'markdown title', date: '2022-11-30' },
  { title: 'markdown title', date: '2022-12-01' },
  { title: 'markdown title', date: '2022-12-31' },
  { title: '✅ markdown title', date: '2012-01-01' }
];

// const meta = arr.map(obj => obj.metadata);
// log(`meta =`, meta);
// return arr;
// const sorted = arr.sort(({ date: a }, { date: b }) => {
//   // 升序排序，最旧的在最前面 ❌
//   if (a < b) {
//     return -1;
//   } else if (a > b) {
//     return 1;
//   } else {
//     return 0;
//   }
// });
const sorted = arr.sort(({ date: a }, { date: b }) => {
  // 降序排序，最新的在最前面 ✅
  if (a < b) {
    return 1;
  } else if (a > b) {
    return -1;
  } else {
    return 0;
  }
});
log(`sorted =`, sorted.map(obj => obj.metadata));
return sorted;

Date.prototype.setHours()

//

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/setHours

refs

String => Date

https://masteringjs.io/tutorials/fundamentals/sort-by-date

https://github.com/mastering-js/masteringjs.io

https://www.delftstack.com/howto/javascript/sort-by-date-javascript/

https://thewebdev.info/2022/01/23/how-to-sort-a-date-string-array-with-javascript/

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