Question

How to get the number of the day from the beginning of the year to a given date in Scala

Answer 1

object DayOfYearDemo {

  def isLeapYear(year: Int): Boolean =
    (year % 4 == 0) && ((year % 100 != 0) || (year % 400 == 0))

  def getDayOfYear(year: Int, month: Int, day: Int): Int = {
    // cumulative days at the end of each month (non-leap year)
    val days = Array(0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334)

    if (isLeapYear(year) && month > 2)
      days(month - 1) + day + 1
    else
      days(month - 1) + day
  }

  def main(args: Array[String]): Unit = {
    val dayOfYear = getDayOfYear(2023, 5, 15)
    
    println(dayOfYear) 
  }
}




/*
run:

135

*/

 

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