Ruby on Rails: Print element of array in a single line in html.erb file

Question

I'm new to html.erb files and I didn't find an answer to my problem. I have array of names and I'm trying to print them in a paragraph tag <p> in one line with ',' like that:

name1, name2, name3

But instead I get this:

name1,
name2,

This is the code:

<% @names_array.each do |name| %>
  <p class="center"><%= name %>,</p>
<% end %>

since you're new, you'd probably want to read up on html elements because your issue can be fixed in a lot of ways, eg using span instead of p, or changing the styling of p to display:inline. w3schools.com/tags/tag_p.asp Also google for block vs inline html elements. — jvnill
– jvnill, Commented Nov 27, 2018 at 15:32

hrnnvcnt · Accepted Answer · 2018-11-27 20:50:09Z

4

You can use Active Support's to_sentence method. Example:

names = ['name1', 'name2', 'name3']

irb(main):001:0> names = ['name1', 'name2', 'name3']
=> ["name1", "name2", "name3"]

irb(main):002:0> names.to_sentence
=> "name1, name2 and name3"

You can modify the last connector passing a word option:

irb(main):003:0> names.to_sentence(last_word_connector: ', ')
=> "name1, name2, name3"

Check the documentation

edited Nov 27, 2018 at 20:50

answered Nov 27, 2018 at 15:56

hrnnvcnt

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Comments

Sebastián Palma · Accepted Answer · 2018-11-27 14:42:49Z

3

Doesn't something like this work?, just join them, leaving them inside the paragraph tag:

<p class="center">
  <%= @names_array.join(', ') %>
</p>

edited Nov 27, 2018 at 14:42

answered Nov 27, 2018 at 14:39

Sebastián Palma

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2 Comments

Ofir Sasson Over a year ago

it worked but I have a ',' at the end like that: name1, name2, name3, and I don't want the last ',' how can I remove it through code?

Marcin Kołodziej Over a year ago

@OfirSasson if the code above leaves an empty comma at the end, it means that your last name is either an empty string ("") or a nil.

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