cycle(first_value, *values)
Instance Public methods
Creates a Cycle object whose to_s method cycles through elements
of an array every time it is called. This can be used for example, to
alternate classes for table rows. You can use named cycles to allow nesting
in loops. Passing a Hash as the last
parameter with a :name key will create a named cycle. The
default name for a cycle without a :name key is
"default". You can manually reset a cycle by calling
#reset_cycle and passing
the name of the cycle. The current cycle string can be obtained anytime
using the #current_cycle method.
# Alternate CSS classes for even and odd numbers...
@items = [1,2,3,4]
<table>
<% @items.each do |item| %>
<tr class="<%= cycle("odd", "even") -%>">
<td>item</td>
</tr>
<% end %>
</table>
# Cycle CSS classes for rows, and text colors for values within each row
@items = x = [{first: 'Robert', middle: 'Daniel', last: 'James'},
{first: 'Emily', middle: 'Shannon', maiden: 'Pike', last: 'Hicks'},
{first: 'June', middle: 'Dae', last: 'Jones'}]
<% @items.each do |item| %>
<tr class="<%= cycle("odd", "even", name: "row_class") -%>">
<td>
<% item.values.each do |value| %>
<%# Create a named cycle "colors" %>
<span style="color:<%= cycle("red", "green", "blue", name: "colors") -%>">
<%= value %>
</span>
<% end %>
<% reset_cycle("colors") %>
</td>
</tr>
<% end %>
Please login to continue.