How to do this?

Rails
1

Hi,
I’d like iterate through a model object(its an array object as you know)
in the view so that it displays 2 database table rows in one html table
row(in separate columns

) and then moves to display the next 2
database table rows in the next html table row.

Like this:

…

array[0] array[1]
array[2] array[3]

Im kinda clueless about this. Any ideas?
Thanks

Petr

2

Thanks.

But, you forgot to mention how to bring that into html, so if you could
do that it would be great.

Thanks again,
Petr

Max M. wrote:

On 10/17/06, Petr [email protected] wrote:

Im kinda clueless about this. Any ideas?
Thanks

Petr

Either the rails only way:

some_array.in_groups_of(2)

which pads with nil, or the more ruby way:

require ‘enumerator’

some_array.slice(2)

Cheers,
Max

3

On 10/17/06, Petr [email protected] wrote:

Im kinda clueless about this. Any ideas?
Thanks

Petr

Either the rails only way:

some_array.in_groups_of(2)

which pads with nil, or the more ruby way:

require ‘enumerator’

some_array.slice(2)

Cheers,
Max

4

I asked this yesterday in a post titled “Going through an array in
batches…”

Hope this helps:

#in_groups_of

<% @products.in_groups_of(4) do |row| %>

<% row.each do |product| %> <%= product.name %> <% end %> <% end -%>
5

On 10/18/06, Petr [email protected] wrote:

Thanks.

But, you forgot to mention how to bring that into html, so if you could
do that it would be great.

Thanks again,
Petr

Use in place of some_list.each. Instead of

<% for thing in list %>
… render stuff …
<% end %>

use

<% list.in_groups_of(2) do |two_things| %>

<%= two_things[0].some_attribute if two_things[0] %> <%= two_things[1].some_attribute if two_things[1] %> <% end %>

The nil check is necessary, as in_groups_of pads the last “row” with
nils if there are not enough elements in the list.

BTW, googling for “rails in_groups_of” would have gotten you there as
well…

Cheers,
Max