How to sort nested array of objects by date

Question

I am creating simple News application, And i am using Firebase as back-end, I have stored News articles in Cloud firestore, In my fields i have News publication time hr:min:sec I want to sort received data by publication time, from the latest to the oldest, any solutions? Thanks in advance

 var data = [ { news: [ { published_at: "2/22/2021", imgUrl: "", id: 159783, title: "short descr", date: "18:11:53", previewText: "some kind of title" } ], newsId: "5GTAbGLfS0hSCOkmTfHD" }, { news: [ { id: 159783, published_at: "2/22/2021", previewText: "some kind of title2", title: "short descr", date: "17:19:53", imgUrl: "" } ], newsId: "lw2hzVe0m3dbcmvBj4Vz" } ] data.forEach((item)=>{ var singleItem = item.news const finalResult = singleItem.sort((a, b) => b.date - a.date) console.log(finalResult) })

Answer 1

You can use string#localeCompare to sort time in hh:mm:ss format.

 const data = [ { news: [ { published_at: "2/22/2021", imgUrl: "", id: 159783, title: "short descr", date: "18:11:53", previewText: "some kind of title" } ], newsId: "5GTAbGLfS0hSCOkmTfHD" }, { news: [ { id: 159783, published_at: "2/22/2021", previewText: "some kind of title2", title: "short descr", date: "17:19:53", imgUrl: "" } ], newsId: "lw2hzVe0m3dbcmvBj4Vz" } ]; data.sort((a,b) => b.news[0].date.localeCompare(a.news[0].date)); console.log(data);

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Answer 2

I think you can do something like this

const finalResult = singleItem.sort((a, b) => Date.parse(`${b.published_at} ${b.date}`) - Date.parse(`${a.published_at} ${a.date}`))