DZone Snippets: idioms code

Select field from database with option selected

raj2569 (Rajkumar S) — Tue, 19 Dec 2006 17:57:12 GMT

to post sess[callcenter_client_id]



select("sess", "callcenter_client_id", CallcenterClient.find_all.collect {|p| [ p.name, p.id ] }, { :selected => @sess.callcenter_client_id.to_i })

make sure that the :selected entry is an integer.

Render partial

raj2569 (Rajkumar S) — Tue, 19 Dec 2006 11:31:33 GMT



<%= render(:partial         => "animal" ,

           :collection      => %w{ ant bee cat dog elk },

           :spacer_template => "spacer" )

%>

animal is the name of template and local variable holding each element of collection inside the partial. animal_counter holds the index of current element in the collection. spacer_template is rendered between each elements in the collection.

Create a date 4 weeks ago from the current date

raj2569 (Rajkumar S) — Tue, 19 Dec 2006 10:16:10 GMT

// description of your code here



t = 4.weeks.ago

Assign a variable a value if it's nil

raj2569 (Rajkumar S) — Mon, 18 Dec 2006 18:16:49 GMT

There is a nifty way to give a variable a value if it's nil



a[i] ||=0

This is useful when you want to assign a value to an array and it's not yet initialized.