From: Rob Biedenharn <Rob@...>
Date: 2009-01-28T15:14:28+09:00
Subject: Re: how to iterate on date ranges


On Jan 28, 2009, at 12:56 AM, Heesob Park wrote:

> 2009/1/28 Newb Newb <revathy.p@angleritech.com>:
>> Hi...here me again
>> If user enters, 2 date parameters.i want to find all the folders  
>> between
>> these date ranges.
>> For example if the user enters 2009-01-02 and 2009-01-30.i want to  
>> make
>> check between these two dates.
>> I have done below code for single date parameter.but i don't know  
>> how to
>> iterate for two date ranges.
>> Dir.foreach("ChatHistory") do |folder_name|
>> if folder_name == params[:e_date][1]
>> @sub_folder = Array.new
>> Dir.foreach(File.join("ChatHistory",folder_name)) do | 
>> sub_folder_name|
>> @sub_folder << sub_folder_name
>> end
>> end
>> end
> You can make array of dates between two dates like this:
>
> require 'date'
> arr = ('2009-01-02'..'2009-01-30').select{|x| Date.parse(x) rescue  
> nil}
>
>
> Regards,
>
> Park Heesob

Why iterate a range of Strings when you can just use Dates!

irb> require 'date'
=> true
irb> (Date.parse('2009-01-02') .. Date.parse('2009-01-31')).map{|d| 
d.to_s}
=> ["2009-01-02", "2009-01-03", "2009-01-04", "2009-01-05",  
"2009-01-06", "2009-01-07", "2009-01-08", "2009-01-09", "2009-01-10",  
"2009-01-11", "2009-01-12", "2009-01-13", "2009-01-14", "2009-01-15",  
"2009-01-16", "2009-01-17", "2009-01-18", "2009-01-19", "2009-01-20",  
"2009-01-21", "2009-01-22", "2009-01-23", "2009-01-24", "2009-01-25",  
"2009-01-26", "2009-01-27", "2009-01-28", "2009-01-29", "2009-01-30",  
"2009-01-31"]
irb> puts (Date.parse('2009-01-02') .. Date.parse('2009-03-31'))
2009-01-02..2009-03-31
=> nil
irb> puts (Date.parse('2009-01-02') .. Date.parse('2009-03-31')).to_a

I don't understand what you're trying to do

-Rob

Rob Biedenharn		http://agileconsultingllc.com
Rob@AgileConsultingLLC.com