Iterating over arbitrary count

[joefiorini]

Hey, long time no talk.

Quick question for you... I have a user who wants to iterate an arbitrary number of times and generate a row for each iteration. It doesn't appear Cadenza supports this. Do you have any interest having Candezna support range identifiers like what Liquid does? I think this would add some significant power to the language.

{% for i in (1..4) %}
  {{ i }}
{% endfor %}
# results in 1 2 3 4

If not, is this type of syntax something I could extend to add in my app?

Thanks man, Joe

[whoward]

hmm having a range literal might be helpful in the future so it's worth looking at

In the meantime you can probably work with a custom block to do this

# in your context or libraries
define_block :times do |context, nodes, parameters|
   expect(parameters).argc(1).first(:is_a => Cadenza::ConstantNode)

   count = parameters.first.value.to_i

   result = ""
   idx = 0

   count.times do
      context.push(:i => idx)
      nodes.each {|child| result << Cadenza::TextRenderer.render(child, context) }
      context.pop
      idx += 1
   end

   result
end

   {% times 3 %}
      {{ i }}
   {% end %}

[whoward]

i haven't tested that btw so your mileage may vary :)

[joefiorini]

Thanks man, I'll give that a shot! I'll reopen if that doesn't work.

[joefiorini]

Thanks again, that worked great! Implemented this morning and deploying my update now.

[whoward]

good to hear that was able to help!