Calculate number of non-weekend days between two dates?

ruby-talk
1

Any date/time libraries out there (I can't seem to find anything in the
std libs) that handle calculations like number of non-weekend days
between two dates, etc.?

2

chrismo wrote:

Any date/time libraries out there (I can't seem to find anything in the
std libs) that handle calculations like number of non-weekend days
between two dates, etc.?

require 'date'

def weekdays(d1, d2)
  count = 0
  d1.upto(d2) do |date|
    count += 1 if [1,2,3,4,5].include?(date.wday)
  end
  count
end

puts weekdays( Date.new(2006, 12, 1), Date.new(2007, 1, 16) )

A more useful twist might be to collect the weekdays and return an
array:

require 'date'

def weekdays(d1, d2)
  _weekdays =
  d1.upto(d2) do |date|
    _weekdays << date if [1,2,3,4,5].include?(date.wday)
  end
  _weekdays
end
    
puts weekdays( Date.new(2006, 12, 1), Date.new(2007, 1, 16) ).size

3

Dale Martenson wrote:

A more useful twist might be to collect the weekdays and return an
array:

How about:

require 'date'
d1 = Date.new( 2006, 12, 1 )
d2 = Date.new( 2007, 1, 15 )

WEEKDAY_NUMBERS = [1,2,3,4,5]
weekdays = (d1..d2).select{ |d| WEEKDAY_NUMBERS.include?( d.wday ) }
p weekdays.length
#=> 32

4

Cool, thx for the suggestions (though I was hoping for a stdlib bit for
corny reasons of my own)

ยทยทยท

On 1/16/07, Phrogz <gavin@refinery.com> wrote:

WEEKDAY_NUMBERS = [1,2,3,4,5]

this can shorten to:

  WEEKDAY_NUMBERS = (1..5)

--
Chris
http://clabs.org