How to get the last Sunday before current date?

Question

I have the following code for getting the last Sunday before the current date:

Calendar calendar=Calendar.getInstance();
calendar.set(Calendar.WEEK_OF_YEAR, cale         


        

Answer 1

Here's how to do it with a Kotlin extension and the Joda Time library.
Answer is based on linqu's answer but this also fixes a bug in that answer. The bug was that it did not work if the current date was the same day you're trying to get.

/**
 * E.g., DateTimeConstants.SUNDAY
 */
fun DateTime.previousDayOfWeek(day: Int): DateTime {
    var date = this
    if(date.dayOfWeek == day) date = date.minusDays(1)

    val offset = (date.dayOfWeek - day + 7) % 7
    return date.minusDays(offset)
}

fun DateTime.previousSunday(): DateTime {
    return previousDayOfWeek(DateTimeConstants.SUNDAY)
}