From: Siep Korteling <s.korteling@...>
Date: 2008-07-07T08:18:29+09:00
Subject: Re: creating dynamic hashmap

Sameera Gayan wrote:
> Robert Klemme wrote:
>> On 04.07.2008 07:03, Sameera Gayan wrote:
>>> any reply will greatly appriciated...
>> Can you be more specific about your problem?  What kind of user input do
>> you expect?  How do you want it to be translated into a Hash?  etc.
>> 
>>   robert
> 
> Hi Robert,
> 
> Thank you for your reply,
> 
> My problem in like this,
> 
> I have a graph to display the crude oil price fluctuation with $. I'm 
> using "gruff" to generate graphs. This graph should generate for a given 
> date range.
> 
> In the x-axis of the graph i want to show the date range.
> 
> In 'gruff' it gets x-axis labels as a hash
> Ex : g.labels = { 0 => 'Mon', 2 => 'Wed', 4 => 'Fri', 6 => 'Sun' }
> 
> So i want to dynamically create this hash map. Inside a loop. (so i can 
> loop the dates and create the x-axis depending on the users date range)
> 
> ultimate hash format should be { 0 => 'Mon', 2 => 'Wed', 4 => 'Fri', 6 
> => 'Sun'}
> 
> so that i can use it as
> 
> g.labels = hash_lables
> 
> hope i make myself clear. thankx for any reply ..
> 
> cheers
> sameera

Is this what you need?

require 'enumerator'
require 'date'

print "enter start date: "
s = gets
print "enter end date: "
e = gets

start_date = Date.parse(s)
end_date = Date.parse(e)
dates = (start_date..end_date)

@slice_size = 2
@label_key = 0
@hash_labels = {}
dates.each_slice(@slice_size) do |date_slice|
  @hash_labels[@label_key] = date_slice[0].strftime("%a")
  @label_key += @slice_size
end

p @hash_labels


hth,

Siep

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