Kotlin .toDatePeriod()

The toDatePeriod() function parses ISO-8601 duration representations and returns a DatePeriod object. ISO-8601 duration representation is a string that starts with the letter P followed by a sequence of numbers and units. The numbers represent the number of units, and the units can be days, weeks, months, years, hours, minutes, or seconds.

Syntax

fun String.toDatePeriod(): DatePeriod

The function returns a DatePeriod object with two properties:

• start: the start date of the duration.
• endInclusive: the end date of the duration, inclusive.

Example

This example demonstrates how to use toDatePeriod the function to parse ISO-8601 duration representations and create DatePeriod objects.

import kotlinx.datetime.toDatePeriod
fun main() {
  // Create a DatePeriod object representing one day.
  val oneDayPeriod = "P1D".toDatePeriod()

  // Print the start and end dates of the DatePeriod object.
  println("Start date: ${oneDayPeriod.start}")
  println("End date: ${oneDayPeriod.endInclusive}")

  // Create a DatePeriod object representing one week.
  val oneWeekPeriod = "P7D".toDatePeriod()

  // Print the start and end dates of the DatePeriod object.
  println("Start date: ${oneWeekPeriod.start}")
  println("End date: ${oneWeekPeriod.endInclusive}")

  // Create a DatePeriod object representing one month.
  val oneMonthPeriod = "P1M".toDatePeriod()

  // Print the start and end dates of the DatePeriod object.
  println("Start date: ${oneMonthPeriod.start}")
  println("End date: ${oneMonthPeriod.endInclusive}")

  // Create a DatePeriod object representing one year.
  val oneYearPeriod = "P1Y".toDatePeriod()

  // Print the start and end dates of the DatePeriod object.
  println("Start date: ${oneYearPeriod.start}")
  println("End date: ${oneYearPeriod.endInclusive}")
}

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The output will be similar to the following:

Start date: 2023-11-02T22:50:34.000Z
End date: 2023-11-03T22:50:34.000Z
Start date: 2023-11-02T22:50:34.000Z
End date: 2023-11-09T22:50:34.000Z
Start date: 2023-11-02T22:50:34.000Z
End date: 2023-12-02T22:50:34.000Z
Start date: 2023-11-02T22:50:34.000Z
End date: 2024-11-02T22:50:34.000Z

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