What does the `Long` represent? Miliseconds since ...

# javascript

[karelpeeters]

What does the Long represent? Miliseconds since epoch?

[Hardik Trivedi]

Yes

[snrostov]

In kotlin/js Long represented as double

[snrostov]

you can (long).unsafeCast() it and pass to Date constructor

[karelpeeters]

Long isn't represented as double, from the docs:

There's no 64 bit integer number in JavaScript, so kotlin.Long is not mapped to any JavaScript object, it's emulated by a Kotlin class.

[karelpeeters]

(https://kotlinlang.org/docs/reference/js-to-kotlin-interop.html)

[snrostov]

hmm. I'm missed this. Thank for link

[Hardik Trivedi]

Yes taking help of inter operability

[Hardik Trivedi]

That's seems a solution

[Hardik Trivedi]

Will share a code after success

[snrostov]

Looks like this works:

@JsName("Date")
external class JsDate {
    constructor (value: Double)
}

fun main(args: Array<String>) {
    val unixTs = 1509703486L * 1000L
    println(JsDate(unixTs.toDouble()))
}

[snrostov]

This compiles to:

var unixTs = new Kotlin.Long(-2125002192, 351);
    println(new Date((new Kotlin.Long(-2125002192, 351)).toNumber()));

[snrostov]

And prints "Fri Nov 03 2017 130446 GMT+0300 (MSK)
" for me