CODEWITHSUNDEEP
ruby-on-railsruby
Leahcim
Leahcim

Reputation: 41949

listing out arrays with different number of elements

The way the models are associated in my Rails app, if I try to list the licenses that a user has with code like this

Licensed in <%= answer.user.licenses.map(&:state) %>

it'll print out like this

Licensed in ["New York"]

Since it's an array, I can remove the array brackets like this

<%= answer.user.licenses.map(&:state)[0] %>

and I get the result I want

Licensed in New York

However, if a user has more than one license (which is a possibility), that's not a good solution, as each license should be listed.

Therefore, I tried this 

   <% answer.user.licenses.map(&:state).each do |state| %>
    <%= state %>
   <% end %>

However, this won't add "smart" commas between licenses, smart meaning "add a comment where necessary but not at the end."

What should the code look like to achieve what I'm trying to do in this situation. I wasn't sure of the keywords I should google to figure this out.

Upvotes: 0

Views: 65

Answers (2)

Sean Hill
Sean Hill

Reputation: 15056

In Rails, you can use to_sentence. That will place a , between all of the elements and will place the word and between the penultimate and ultimate words.

Upvotes: 4

Intrepidd
Intrepidd

Reputation: 20878

Try this

answer.user.licenses.map(&:state).join(',')

This will add , between each element of the array.

Upvotes: 4

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