I have question is there maybe a fine simple solution to this task:
I have first_date = "2011-02-02" , last_date = "2013-01-20" and period = 90 (days).
I need to get arrays with two elements for example:
[first_date, first_date + period] ... [some_date, last_date].
I will make it with some kind of a loop but maybe there is some nice fancy way to do this :D.
Date has a step method:
require 'date'
first_date = Date.parse("2011-02-02")
last_date = Date.parse("2013-02-20")
period = 90
p first_date.step(last_date-period, period).map{|d| [d, d+period]}
#or
p first_date.step(last_date, period).map.each_cons(2).to_a
step method (1.9.3 only). It would have been perfect if its semantics was to fully respect the limit argument. This also requires a last step to ensure the last range ends correctly on last_date, as requested. Very helpful nevertheless!require 'pp'
require 'date'
first_date=Date.parse "2011-02-02"
last_date=Date.parse "2013-01-20"
period = 90
periods = []
current = first_date
last = current + period
while(last < last_date ) do
periods << [current, last]
current = last
last = current + period
end
if periods[-1][1] != last_date
periods << [periods[-1][1], last_date]
end
p periods
I am assuming that the last period must end on last_date regardless of its length, as your question implies.