# Hash key value pairs **URL:** \ **Category:** Rails\ **Created:** [February 12, 2008, 10:02pm UTC](https://www.ruby-forum.com/t/hash-key-value-pairs/128947 "2008-02-12T22:02:37Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![KTU](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/ecae2f/32.png) [@KTU](https://www.ruby-forum.com/u/KTU)\ **Post date:** [February 12, 2008, 10:02pm UTC](https://www.ruby-forum.com/t/hash-key-value-pairs/128947/1 "2008-02-12T22:02:37Z")
Hi It seems to me that you cant append to hash. I am trying to find a way to dynamically create key value pairs. Example some\_hash = {“name” =\> “tom”, “uid”=“100”, “mail” = “[tom.dot.com](http://tom.dot.com)” } Now I have function which loops thru 100 users and I would need to append them to end of that hash ie. some\_hash should start to look like this: some\_hash = {“name” =\> “tom”, “uid”=“100”, “mail” = “[tom.dot.com](http://tom.dot.com)”, “name” =\> “diana”, "uid=“101”, “mail” =\> “[diana.dot.com](http://diana.dot.com)”, … and so } I tried has merge but since keys are same for all entries ie. (name, uid, mail) it only replaced current value and I ended up having a hash with only last value on that loop. If this is not possible whats the way to dynamically create such key, value pairs so I can loop then thru and check if key value is uid (or email or name) and then do whatever … ---
**Author:** ![KTU](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/ecae2f/32.png) [@KTU](https://www.ruby-forum.com/u/KTU)\ **Post date:** [February 12, 2008, 10:12pm UTC](https://www.ruby-forum.com/t/hash-key-value-pairs/128947/2 "2008-02-12T22:12:02Z")
On 12 Feb 2008, at 21:01, KTU wrote: > Now I have function which loops thru 100 users and I would need to > and I ended up having a hash with only last value on that loop. that’s pretty much the definition hash: a key maps to a unique value. Do you in fact just want an array of hashes? Fred ---
**Author:** ![KTU](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/ecae2f/32.png) [@KTU](https://www.ruby-forum.com/u/KTU)\ **Post date:** [February 12, 2008, 10:17pm UTC](https://www.ruby-forum.com/t/hash-key-value-pairs/128947/3 "2008-02-12T22:17:54Z")
yes that would do but I cant seem to find any examples how to do this On Feb 12, 11:11 pm, Frederick C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) ---
**Author:** ![KTU](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/ecae2f/32.png) [@KTU](https://www.ruby-forum.com/u/KTU)\ **Post date:** [February 12, 2008, 10:36pm UTC](https://www.ruby-forum.com/t/hash-key-value-pairs/128947/4 "2008-02-12T22:36:11Z")
On 12 Feb 2008, at 21:16, KTU wrote: > yes that would do but I cant seem to find any examples how to do this Well it’s not rocket science. If users if an array of users, then result = [] users.each do |user| result \<\< {:mail =\> user.mail, :name =\> user.name} end will do the trick. Or slightly more ideomatically: users.collect {|user| {:mail =\> user.mail, :name =\> user.name} } that said most of the time I would just use the users array as is. Fred ---
**Author:** ![KTU](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/ecae2f/32.png) [@KTU](https://www.ruby-forum.com/u/KTU)\ **Post date:** [February 12, 2008, 11:30pm UTC](https://www.ruby-forum.com/t/hash-key-value-pairs/128947/5 "2008-02-12T23:30:54Z")
well im a noob but looks im getting closer. what i have now is ldap.search( :base =\> treebase, :filter =\> filter ) do |entry| # here is email removed\_email\_address@domain.invalid emailstr = entry[:mail].to\_s # here is John’s uid = john uidstr = entry[:uid].to\_s # here is john’s fullname fullnamestr = entry[:cn].to\_s if emailstr != ‘’ && uidstr != ‘’ && fullnamestr != ‘’ then @collection \<\< {:mail =\> emailstr, :fullname =\> fullnamestr, :uid =\> uidstr} end end and print to those out i have \<% @collection.each do |key,val| %\> KEY: \<%= key %\> VAL: \<%= val %\> \<% end %\> this results to this: KEY: removed\_email\_address@domain.invalid VAL: ie. i cant seem to separate those values but all comes as one huge string. and btw thanks for the help so far. On Feb 12, 11:35 pm, Frederick C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) ---
**Author:** ![KTU](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/ecae2f/32.png) [@KTU](https://www.ruby-forum.com/u/KTU)\ **Post date:** [February 13, 2008, 8:38am UTC](https://www.ruby-forum.com/t/hash-key-value-pairs/128947/6 "2008-02-13T08:38:49Z")
On 12 Feb 2008, at 22:30, KTU wrote: > well im a noob but looks im getting closer. what i have now is > > \<% @collection.each do |key,val| %\> > KEY: \<%= key %\> VAL: \<%= val %\> > > \<% end %\> The members of the collection are hashes, but @collection isn’t. You need to iterate over @collection, which yields you the hashes, and then you need to iterate over those to print the key value pairs. There’s probably not much value in doing this as opposed to iterating over the entries returned by ldap.search Fred ---
**Author:** ![KTU](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/ecae2f/32.png) [@KTU](https://www.ruby-forum.com/u/KTU)\ **Post date:** [February 13, 2008, 9:41am UTC](https://www.ruby-forum.com/t/hash-key-value-pairs/128947/7 "2008-02-13T09:41:14Z")
well ldapsearch works in controller only and from there I need to pass data to the view. This is too complicated for me since there are no good examples on the net. I just do big array and go those one by one thru. On Feb 13, 9:37 am, Frederick C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) ---
**Author:** ![KTU](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/ecae2f/32.png) [@KTU](https://www.ruby-forum.com/u/KTU)\ **Post date:** [February 13, 2008, 9:49am UTC](https://www.ruby-forum.com/t/hash-key-value-pairs/128947/8 "2008-02-13T09:49:31Z")
On 13 Feb 2008, at 08:40, KTU wrote: > well ldapsearch works in controller only and from there I need to pass > data to the view. This is too complicated for me since there are no > good > examples on the net. I just do big array and go those one by one thru. Creating some collection in a controller and then iterating over that in a view is something that any tutorial app will cover. Sure most of those collections would be ActiveRecord objects rather than ldap thingies, but that doesn’t make any difference. All you need to do is @ldap\_entries = ldap.search( :base =\> treebase, :filter =\> filter ) in your controller, and \<% @ ldap\_entries.each do |entry| %\> … \<% end %\> Or \<%= render :partial =\> ‘entry’, :collection =\> @ldap\_entries %\> and then have \_entry.html.erb that looks something like mail : \<%= h entry.mail%\> … Fred ---
**Author:** ![KTU](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/ecae2f/32.png) [@KTU](https://www.ruby-forum.com/u/KTU)\ **Post date:** [February 13, 2008, 10:57am UTC](https://www.ruby-forum.com/t/hash-key-value-pairs/128947/9 "2008-02-13T10:57:47Z")
omg it cant be that easy !!! yes yes it works thanks a lot man !!! On Feb 13, 10:48 am, Frederick C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)