How to update value of object in array using javascript

Question

I have the array like this

myArray=[{ id:1, date:2019-03-17, title:'name1' }, { id:2, date:2019-04-17, title:'name2' }, { id:3, date:2019-05-17, title:'name3' }, ]

how can I update it and get a new array like below

newArray=[ { id:1, date:moment(2019-03-17).format('L'), title:'name1' }, { id:2, date:moment(2019-04-17).format('L'), title:'name2' }, { id:3, date:moment(2019-05-17).format('L'), title:'name3' }, ]

the above is just my example. The real problem is I got dates from Postgres, and these dates do not have timezone. So I need to use moment to format all dates that I got from database Thanks

ambianBeing · Accepted Answer · 2019-10-26 18:02:18Z

If you use node and pg, then you could do:

const pg = require("pg"); const PG_TIMESTAMP_OID = 1114; const PG_TIMESTAMPTZ_OID = 1184; const PG_DATESTAMP = 1082; const parseDate = (date) => (date === null ? null : moment(date).format()); pg.types.setTypeParser(PG_TIMESTAMP_OID, parseDate); pg.types.setTypeParser(PG_TIMESTAMPTZ_OID, parseDate); pg.types.setTypeParser(PG_DATESTAMP, parseDate);

This way you'd always get the moment format when querying postgres.

If you do not use it, or don't want to, then you could just map your array:

const newArray = myArray.map(item => ({ ...item, date: moment(item.date).format("L") }));

Channa · Accepted Answer · 2019-10-26 17:37:04Z

0

You can use a foor loop and edit your object as follows,

for(var i = 0; i < myArray.length; i++) { myArray[i].date = "moment(" + myArray[i].date + ").format('L')"; }

answered Oct 26, 2019 at 17:37

Channa

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1 Comment

Phuong Tran Over a year ago

Hi thanks, it works when I do this for(var i = 0; i < myArray.length; i++) { myArray[i].date = moment( myArray[i].date ).format('L'); }

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