kotlin-stdlib/kotlin.time/Duration/toLong

toLong

fun toLong(unit: DurationUnit): Long(source)

Returns the value of this duration expressed as a Long number of the specified unit.

The part of this duration that is smaller than the specified unit becomes a fractional part of the result and then is truncated (rounded towards zero).

If the result doesn't fit in the range of Long type, it is coerced into that range:

An infinite duration value is converted either to Long.MAX_VALUE or Long.MIN_VALUE depending on its sign.

Since Kotlin

1.6

Samples

import kotlin.test.*
import kotlin.time.*
import kotlin.time.Duration.Companion.days
import kotlin.time.Duration.Companion.hours
import kotlin.time.Duration.Companion.microseconds
import kotlin.time.Duration.Companion.milliseconds
import kotlin.time.Duration.Companion.minutes
import kotlin.time.Duration.Companion.nanoseconds
import kotlin.time.Duration.Companion.seconds

fun main() { 
   //sampleStart 
   println(2900.milliseconds.toLong(DurationUnit.SECONDS)) // 2
println(3.hours.toLong(DurationUnit.MINUTES)) // 180
println(1.minutes.toLong(DurationUnit.NANOSECONDS)) // 60000000000

println("(365 * 300).days.toLong(DurationUnit.NANOSECONDS) == Long.MAX_VALUE is ${(365 * 300).days.toLong(DurationUnit.NANOSECONDS) == Long.MAX_VALUE}") // true
println("(-Duration.INFINITE).toLong(DurationUnit.DAYS) == Long.MIN_VALUE is ${(-Duration.INFINITE).toLong(DurationUnit.DAYS) == Long.MIN_VALUE}") // true 
   //sampleEnd
}