CODEWITHSUNDEEP
javascript
yavgz
yavgz

Reputation: 369

how can group UTC dates by date YYY-MM-DD?

I have an array of utc dates like:

[
 {createdAt: '2022-01-19T22:15:33.008Z'},
 {createdAt: '2022-01-19T21:15:33.008Z'},
 {createdAt: '2022-01-19T10:15:33.008Z'},
 {createdAt: '2022-01-20T23:15:33.008Z'},
 {createdAt: '2022-01-21T23:15:33.008Z'},
 {createdAt: '2022-01-22T23:15:33.008Z'},
 {createdAt: '2022-01-18T23:15:33.008Z'},
]

My desired output is:

{
  "2022-01-19":[
    {createdAt: '2022-01-19T22:15:33.008Z'},
    {createdAt: '2022-01-19T21:15:33.008Z'},
    {createdAt: '2022-01-19T10:15:33.008Z'}
  ],
   "2022-01-20":[
    {createdAt: '2022-01-20T23:15:33.008Z'},
  ],
   "2022-01-21":[
    {createdAt: '2022-01-21T23:15:33.008Z'},
  ],
   "2022-01-22":[
   {createdAt: '2022-01-22T23:15:33.008Z'},
  ],
   "2022-01-18":[
    {createdAt: '2022-01-18T23:15:33.008Z'},
  ],

}

I don't know if there is any date management function to get the YYYYY-MM-DD of a timestamp. how can I do it?

Upvotes: 0

Views: 69

Answers (2)

Spectric
Spectric

Reputation: 32002

You can split the string by the character 'T', then get the first item in the array to convert the string into the correct format.

Then, you can use Array.reduce to construct the object:

let arr = [
 {createdAt: '2022-01-19T22:15:33.008Z'},
 {createdAt: '2022-01-19T21:15:33.008Z'},
 {createdAt: '2022-01-19T10:15:33.008Z'},
 {createdAt: '2022-01-20T23:15:33.008Z'},
 {createdAt: '2022-01-21T23:15:33.008Z'},
 {createdAt: '2022-01-22T23:15:33.008Z'},
 {createdAt: '2022-01-18T23:15:33.008Z'},
]

const res = arr.reduce((a,b) => {
  let date = b.createdAt.split("T")[0];
  if(!a[date]){
    a[date] = [];
  }
  a[date].push(b);
  return a;
}, {})

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

Upvotes: 1

TrebuAB
TrebuAB

Reputation: 131

let tab = [
 {createdAt: '2022-01-19T22:15:33.008Z'},
 {createdAt: '2022-01-19T21:15:33.008Z'},
 {createdAt: '2022-01-19T10:15:33.008Z'},
 {createdAt: '2022-01-20T23:15:33.008Z'},
 {createdAt: '2022-01-21T23:15:33.008Z'},
 {createdAt: '2022-01-22T23:15:33.008Z'},
 {createdAt: '2022-01-18T23:15:33.008Z'},
]
let output = {};
tab.forEach(element => {
  let date = element.createdAt.split('T')[0];
  if (output[date] == undefined) {

    output[date] = []
  }
  output[date].push(element)
});

console.log(output)

Upvotes: 2

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