Find if an array of objects includes an attribute with a specific value

The following code works, but can you tell me if this is the right way to do it?

I have an array of Position objects and I want to check if it contains an objec开发者_开发问答t which attribute 'hidden' has "false' value:

<% if positions.collect{|position| position.hidden}.include?(false) %>
  ...
<% end %>

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<% if positions.any?{|position| !position.hidden} %>
  ...
<% end %>

Using the any? method

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if positions.any? {|position| not position.hidden}

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you can also use all? method:

<% unless positions.all? {|position| position.hidden} %>
 ...
<% end %>