Forum: Ruby on Rails how i add the sum in too this field

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Nopp D. (Guest)
on 2009-02-19 15:04
<tr>
    <th>Day work</th>
    <th>Start</th>
    <th>End</th>
    <th>Work time/Day</th>
</tr>


  <% for shift in @shifts %>
<tr>
  <td><%= shift.date.strftime '%a' %> <%= shift.date.strftime '%d/%m/%Y'
%></td>
  <td><%= time_ampm shift.start %></td>
  <td><%= time_ampm shift.end %></td>
  <td><%= (shift.end - shift.start)/100 %></td>
</tr>


now I want to add the sum of Work time/Day in to new field when i create

what is that command
MaD (Guest)
on 2009-02-19 15:18
(Received via mailing list)
to be honest, i don't really understand what you are trying to do, but
if you just want to build a sum to put it into some field:
initialize a variable with 0 (outside of your for-loop) and add any
value you want to that variable.

sum = 0
rows.each do |row|
  sum += row.value
end
puts sum
Conrad T. (Guest)
on 2009-02-19 15:30
(Received via mailing list)
On Thu, Feb 19, 2009 at 5:17 AM, MaD <removed_email_address@domain.invalid> 
wrote:

> puts sum
Also, you should be able to do the following:

sum = rows.inject(0) { | sum, row | sum + row.value }

Good luck,

-Conrad
Nopp D. (Guest)
on 2009-02-19 15:37
Attachment: untitled.PNG (0 Bytes)
from "<%= (shift.end - shift.start)/100 %>" mean work time per day

now i want to add the sum of Total work time i to new field

i'm newbie for ROR please tell me step by step , thank you .
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