Question

How to add “0,” after each loop in Ruby (At the data: part of the series)

So first loop would 
show only the value 
next loop 0,value
next loop 0,0,value 
next loop 0,0,0,value
etc..




series: [
    <% @prot = ProjectTask.where("project_id = ? AND taskType = ?" ,@project.id, "Pre-Sales")%>
            <% @prot.each do |prt| %>
            <% hoursSum = 0 %>
          {
              name: '<%= prt.task_name%>',
              data: [(here after each loop of @prot i want to add "0," here)<% @taskHours = Effort.where(:project_task_id => prt.id) %>
                        <% @taskHours.each do |th| %>
                            <% hoursSum = hoursSum + th.hours %>
                        <% end %>
                        <%= hoursSum%>
              ]
          },<% end %>

Answer 1

<% @prot.each_with_index do |index, prt| %>
    ...
    <%= "0," * index %>
    ...
<% end %>