# Creating dynamic hashmap **URL:** \ **Category:** Ruby\ **Created:** [July 4, 2008, 7:06am UTC](https://www.ruby-forum.com/t/creating-dynamic-hashmap/142179 "2008-07-04T07:06:21Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![sameera](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/b487fb/32.png) [@sameera](https://www.ruby-forum.com/u/sameera)\ **Post date:** [July 4, 2008, 7:06am UTC](https://www.ruby-forum.com/t/creating-dynamic-hashmap/142179/1 "2008-07-04T07:06:21Z")
Hi All, I have a question about creating a dynamic hash map. I’m using “gruff” and in that , the lables parameter should be like this (as in example) g.labels = { 0 =\> ‘Mon’, 2 =\> ‘Wed’, 4 =\> ‘Fri’, 6 =\> ‘Sun’ } in my case, above dates are dynamic and user will select the date range. So i need to create the hashmap dynamically. can i use a loop, or … how can i do this, any reply will greatly appriciated… thankx guys, cheers sameera ---
**Author:** ![sameera](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/b487fb/32.png) [@sameera](https://www.ruby-forum.com/u/sameera)\ **Post date:** [July 4, 2008, 8:45am UTC](https://www.ruby-forum.com/t/creating-dynamic-hashmap/142179/2 "2008-07-04T08:45:37Z")
On 04.07.2008 07:03, Sameera G. 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 ---
**Author:** ![sameera](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/b487fb/32.png) [@sameera](https://www.ruby-forum.com/u/sameera)\ **Post date:** [July 4, 2008, 10:11am UTC](https://www.ruby-forum.com/t/creating-dynamic-hashmap/142179/3 "2008-07-04T10:11:00Z")
Robert K. wrote: > On 04.07.2008 07:03, Sameera G. 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 ---
**Author:** ![sameera](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/b487fb/32.png) [@sameera](https://www.ruby-forum.com/u/sameera)\ **Post date:** [July 4, 2008, 4:59pm UTC](https://www.ruby-forum.com/t/creating-dynamic-hashmap/142179/4 "2008-07-04T16:59:59Z")
On 04.07.2008 10:07, Sameera G. wrote: > Robert K. wrote: > > > On 04.07.2008 07:03, Sameera G. 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. > g.labels = hash\_lables > > hope i make myself clear. thankx for any reply … Um, this is pretty basic stuff. Did you actually use Hashes before? You will need this to get your key value pairs defined: [http://www.ruby-doc.org/core/classes/Hash.html#M000161](http://www.ruby-doc.org/core/classes/Hash.html#M000161) Cheers robert ---
**Author:** ![sameera](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/b487fb/32.png) [@sameera](https://www.ruby-forum.com/u/sameera)\ **Post date:** [July 7, 2008, 4:50am UTC](https://www.ruby-forum.com/t/creating-dynamic-hashmap/142179/5 "2008-07-07T04:50:14Z")
Hi Siep, Wow, U saved my day !!! that is what exactly i wanted, Still haven’t try it (just now got in to office ;)) I will play around with it and hope it will fix my problem. thankx a lot again for all Robert and You, cheers sameera ---
**Author:** ![sameera](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/b487fb/32.png) [@sameera](https://www.ruby-forum.com/u/sameera)\ **Post date:** [July 7, 2008, 1:19am UTC](https://www.ruby-forum.com/t/creating-dynamic-hashmap/142179/6 "2008-07-07T01:19:38Z")
Sameera G. wrote: > Robert K. wrote: > > > On 04.07.2008 07:03, Sameera G. 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