Sort Issue Solved

The content_tag is not working because it adds a begin and end tag <div> </div>
http://apidock.com/rails/ActionView/Helpers/TagHelper/content_tag

app/helpers/application_helper.rb 
changed the name of the is_sorted? method to sort_active?

scope - within the context of this thing (limited vision) (This is not JQuery)

all enumerable objects respond to each

each wants an array

Method any? http://apidock.com/ruby/Enumerable/any%3F
any?() public

Passes each element of the collection to the given block. The method returns true if the block ever returns a value other than false or nil. If the block is not given, Ruby adds an implicit block of {|obj| obj} (that is any? will return true if at least one of the collection members is not false or nil.

%w{ant bear cat}.any? {|word| word.length >= 3}   #=> true
%w{ant bear cat}.any? {|word| word.length >= 4}   #=> true
[ nil, true, 99 ].any?                            #=> true

if params[:scopes] array (what is this calling?)
  params is a query string  in a url or any data passed through the url- gets turned into a hash in ruby named params  (url decoder)

Find list-group-item in bootstrap
http://getbootstrap.com/components/#list-group Contextual classes
Use contextual classes to style list items, default or linked. Also includes .active state.
We used the class list-group-item-success and it is already styled!

app/helpers/application_helper.rb

  def will_collapse?
    unless params[:scopes]
      " collapse"
    end
  end

  def sort_active?(current_scope)
    if params[:scopes] && params[:scopes].any? { |scope| scope == current_scope }
      "list-group-item-success"
    end
  end

  if params[:scopes] &&  if it is nil or ...

app/views/crowdshops/_sidebar_sort.html.erb 

<ul class="list-group panel-collapse <%= will_collapse? %>">
  <li class="list-group-item <%= sort_active?("popular") %>">
    <%= link_to "Popular", crowdshop_path(crowdslug, scopes: ["popular"]) %>
  </li>
  <li class="list-group-item <%= sort_active?("recent") %>">
    <%= link_to "Recent", crowdshop_path(crowdslug, scopes: ["recent"]) %>
  </li>
  <%= render partial: "sidebar_tag", collection: current_crowdshop.tags.uniq %>
</ul>

commit message:

Highlight sort box in the sidebar to differentiate

Highlight sort box in the sidebar to differentiate the tag so that the user knows how the products are currently being sorted.

Creates two helper methods
  is_active?
    embeds code into the view which adds the class list-group-item-success
  will_collapse?
    makes sure the panel remains open (not collapsing) after sort

Uses the class list-group-item-success which changes the background-color of the sort parameter so the user can identify that the items have been sorted.

  modified:   app/helpers/application_helper.rb 

modified: app/views/crowdshops/_sidebar_sort.html.erb