Ruby/Rails Iterating Array of Hashes - ruby

Question

I have a table that is getting populated from an Array of Hashes. The data looks like this:
[
{'key' => 'some key', 'value' => 'some value'},
{'key' => 'some key2', 'value' => 'some value2'},
{'key' => 'some key3', 'value' => 'some value3'},
{'key' => 'some key4', 'value' => ''},
{'key' => 'some key5', 'value' => ''}
]
But it can also look like this:
[
{'key' => 'some key', 'value' => ''},
{'key' => 'some key2', 'value' => ''},
{'key' => 'some key3', 'value' => ''}
]
What's happening now is that the data where the values are all empty strings is rendering rows on my view. I don't want to render a row if ALL the values are empty strings. If the values have at least one non-empty string, I do want to render that row.
How can I stop the rendering of a row if ALL the values are empty strings? I've tried iterating through the data, which sort of works. This code:
<% #data.each do |r| %>
<tr>
<% r.each do |h| %>
<% unless h['value'].empty? %>
<td><%= h['value'] %></td>
<% end %>
<% end %>
</tr>
<% end %>
stops rendering the rows where all values are empty, but it also doesn't render the <td> where the row has some values that are empty because it's not rendering those <td>.

Answer 1

You can't just skip a few <td> when generating a <tr> because it'll most probably break the rendering of the <table>. ​
So, before starting to generate a « row » you'll have to make sure that you want to display it.
<% #data.each do |r| %>
​<% unless r.all? { |h| h["value"].empty? } %>
​<tr>
​<% r.each do |h| %>
​<td><%= h['value'] %></td>
​<% end %>
​</tr>
​<% end %>
<% end %>