From: kwatch@... (kwatch)
Date: 2003-02-17T19:04:40+09:00
Subject: even? and odd? methods in Integer class

Why Integer class doesn't have 'even?' nor 'odd?' method?
Of course, it is easy to define by myself.
But I wonder why these methods are not included in Ruby
by default?

..--------------------
 class Integer
   def even?
     return self % 2 == 0
   end
   def odd?
     return self % 1 == 0
   end
 end
..--------------------

I believe that these methods are very useful and friendly,
especially for Web Designers.
They're familiar with a concept about modulo, but not familiar
with an operator of modulo (= '%').

..--------------------
<% count = 0 %>
<% for item in list do %>
  <% count += 1 %>
  <% if count % 2 == 0 then %>   <!-- count.even? is more hopeful -->
    <tr class="even">
      <td><%=item%></td>
    </tr>
  <% else %>
    <tr class="odd">
      <td><%=item%></td>
    </tr>
  <% end %>
<% end %>
..--------------------

I hope these methods are to be built-in methods.
Give your opinion, please.

--
regards
kwatch