Ruby : generate a date range

30 Nov 2012

This is a simple post just to demonstrate how to get all the valid dates in between two given dates. Consider the situation that you have to loop through each date between 2012-10-27 and 2012-11-03. Please find below the code which I used to achieve this.

require "active_support/time"
#
# Check the given date is valid or not
# @param dt [String] [Date]
#
# @return [Boolean]
def valid_date?(dt)
begin
Date.parse(dt)
true
rescue => e
false
end
end

#
# Compute the first and last dates according to the params.
#
# @param first [String] [First date]
# @param last [String] [Last date]
#
# @return [Array] [Array include first and last date]
def generate_date_range(first, last)
first, last = "", first unless last
if last.nil? || last.empty?
last = (Time.now - 1.day).in_time_zone('Kolkata').strftime("%Y-%m-%d")
end
if first.empty?
first = Time.strptime(last, "%Y-%m-%d").in_time_zone('Kolkata').beginning_of_month.strftime("%Y-%m-%d")
end
(first..last).select { |d| valid_date?(d) }
end

p generate_date_range("2012-10-27", "2012-11-03")

Output :

Hope it helped you.
Thank you.

If you find my work helpful, You can buy me a coffee.

Revath S Kumar
Rubyist / JavaScripter
rsk [@] revathskumar [.] com

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 3.0 License, and code samples are licensed under the Apache 2.0 License.

Revath S Kumar

Alone I can't make this world better, so I do open source.

Ruby : generate a date range

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