newbie problem

rubyonrails-talk
1

Trying to learn how to work with arrays. Using RubyMine.

Trouble with array syntax below in html.erb file.

Ruby Arrays

<%= array = [‘a’,‘b’,‘c’] %>

Shows up in browser as this:

[“a”, “b”, “c”]

using 1.9.1

Thanks for any suggestions.

2

<%= array = ['a','b','c'] %> Shows up in browser as this: ["a", "b", "c"]

What's wrong with that?

Thanks for any suggestions.

Your post doesn't include any questions, so it's a little hard to know where you want help.

3

Trying to learn how to work with arrays. Using RubyMine. Trouble with array syntax below in html.erb file. <html> <head> <title>Ruby Arrays</title> </head> <body> <%= array = ['a','b','c'] %> </body> </html> Shows up in browser as this: ["a", "b", "c"]

You have asked it to show the array and it has done so. What are you trying to do? Possibly you need something to use something like array.each. Possibly have a look at some basic Ruby tutorials (as opposed to Rails tutorials).

using 1.9.1

I presume that is the version of Ruby, I don't know which version of Rails you are using, but I believe there are problems with ruby 1.9.1 and some versions of rails.

Colin

4

Im not getting the output I expect. In the tutorial I am doing. It is suppose to just write the values to the browser.

Which would write a,b,c to the browser and shouldn’t also be showing the array brackets or double quotes.

Then I would be able to continue to call the values of the array and write the results to a browser using ruby code within the erb file.

My question: Whats wrong with the code I’m writing?

Thanks for your feedback!

5

There's nothing wrong with your code, it's working perfectly. But if you want to iterate the array, there are several ways. Most commonly, you can use ".each":

<% array = ['a','b','c'] %> <% array.each do |element| %>   <%= element %> <% end %>

but if the format you've noted is specific ("a,b,c") then you can use the ".join" method:

<% array = ['a','b','c'] %> <%= array.join(", ") %>

I would recommend having a play with the Enumerable and Array API pages:

Rails add more functionality to these, but getting a grasp on the Ruby will help.

6

%w( a b c )

7

I wasn't going to get into array-making idioms - I just stuck to the OP's method of populating his array :slight_smile:

8

Thank you much. I get it now!