Ruby Fu

You should understand this...

a=[:x,:y,:z] # => [:x, :y, :z]
a.map{|a|}   # => [nil, nil, nil]
a            # => :z

...to know why this routes.rb example using with_options...

map.with_options :controller => 'users',
                 :action => 'show' do |map|
  map.user_groups  '/users/:id/groups',  :section => 'groups'
  map.user_history '/users/:id/history', :section => 'history'
end

...is bad.

Don't reuse the name of a local variable as a yielded local variable for use inside of a block, because the assignment will persist after the lifespan of the block. The routes example should look more like this...

map.with_options :controller => 'users',
                 :action => 'show' do |users|
  users.user_groups  '/users/:id/groups',  :section => 'groups'
  users.user_history '/users/:id/history', :section => 'history'
end

That is all.

Labels: block, routes, ruby, with_options