Hash key value pairs

Rails
1

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” }

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”,
“name” => “diana”, "uid=“101”, “mail” => “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 …

2

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

3

yes that would do but I cant seem to find any examples how to do this

On Feb 12, 11:11 pm, Frederick C. [email protected]

4

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

5

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 [email protected]

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: [email protected] 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. [email protected]

6

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

7

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. [email protected]

8

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

9

omg it cant be that easy !!! yes yes it works thanks a lot man !!!

On Feb 13, 10:48 am, Frederick C. [email protected]