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kotlinlang

Is there any way to get a timestamp (like System.currentTimeMillis()) in a multiplatform project without using expect/actual?

Not yet, but there is already Clock interface in 1.3.50, but for now there is only implementation of Monotonic time

Best lib I've found for date/time is Klock <https://github.com/korlibs/klock>
But if you just need timestamp an expect/actual should

It's the only fully implemented lib for date/time in kotlin multiplatform. It's also not very good. If you only need to get the current system time in milliseconds, use expect/actual.

Or one which is quite alpha:
<https://github.com/fluidsonic/fluid-time> :smile:
But only jdk7, jdk8 &amp; osx/ios so far by wrapping platform-specific API.

It’s structure is similar to `java.time`.

If I want to implement it myself using expect/actual and use it in a test, how should I config that? The kotlin tests in a multiplatform project is executed on the jvm right? Then I need to provide the java actual implementation in some way. Do you know how to do that?

<@UM6N66ZKM> There is an implementation in this sample app.  This is link to the JVM implementation <https://github.com/reduxkotlin/NameGameSampleApp/blob/master/common/src/jvmMain/kotlin/org/reduxkotlin/namegame/common/util/TimeUtil.kt>

This is one way of doing it:
common:
```
expect object TimeUtil {
    fun systemTimeMs(): Long
}
```

iOS:
```
actual object TimeUtil {
    actual fun systemTimeMs(): Long = NSDate().timeIntervalSince1970.toLong() * 1000
}
```
JVM:
```
actual object TimeUtil {
    actual fun systemTimeMs(): Long = System.currentTimeMillis()
}
```

I guess for iOS you mean:
```
(NSDate().timeIntervalSince1970 * 1000).toLong()
```
otherwise you lose the milliseconds