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comp.lang.ruby

how to iterate on date ranges

Newb Newb

1/28/2009 5:16:00 AM

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
pls kindly assist me friends.
--
Posted via http://www.ruby-....
2 Answers

Heesob Park

1/28/2009 5:57:00 AM

0

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

Rob Biedenharn

1/28/2009 6:14:00 AM

0


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://agileconsult...
Rob@AgileConsultingLLC.com