Parse array of Date strings Date array in Javascript

Question

I am receiving this JSON object:

response.myDates = [ "2017-11-19T00:00:00.000Z", "2017-12-08T00:00:00.000Z", "2017-12-25T00:00:00.000Z", "2017-12-31T00:00:00.000Z", "2018-01-01T00:00:00.000Z" ]

I would like to save all these dates (actually there are hundreds of them) in a Date array parsedDates in Javascript.

Is there a simple way to do it without a while loop?

@musefan I bet map uses but not OP going to write a loop for this. — Muthu Kumaran
– Muthu Kumaran, Commented Nov 9, 2017 at 10:59
@MuthuKumaran: Sometime you have to criticise to help. If someone is doing something wrong do you not tell them they are wrong? Would you just say "well done, keep doing that wrong thing you are doing". Yes, people often don't like criticism and they get in a huff about it, but they end up better off for it in the long run. — musefan
– musefan, Commented Nov 9, 2017 at 11:04

Amit · Accepted Answer · 2017-11-09 10:57:22Z

10

You can simple do a map to new Date();

let results = response.myDates.map(date => new Date(date))

edited Nov 9, 2017 at 10:57

answered Nov 9, 2017 at 10:53

Amit

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2 Comments

Jeremy Thille Over a year ago

I also thought about that, but surprisingly, this outputs an array of strings (!!) Well, at least, it does in a Stackoverflow snippet (I don't really get it)

inane Over a year ago

Elegant and useful solution. Thank you!!

Jeremy Thille · Accepted Answer · 2017-11-09 11:02:03Z

2

Just map over your array :

const myDates = [ "2017-11-19T00:00:00.000Z", "2017-12-08T00:00:00.000Z"],
      datesArray = myDates.map( dateString => new Date(dateString) )
      
console.log(datesArray)

Note :

Surprisingly, this Stackoverflow snippet outputs an array of strings (not sure why), but if you run it in your Chrome console or in Codepen, it outputs an array of dates, as it should

answered Nov 9, 2017 at 11:02

Jeremy Thille

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1 Comment

RobG Over a year ago

The SO console is it's own environment, it takes some liberties when presenting human readable versions of objects.

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