CODEWITHSUNDEEP
ruby-on-railsarraysruby-on-rails-3multidimensional-array
Jaspreet Kaur
Jaspreet Kaur

Reputation: 25

Nested dynamic array rails

I have created an array 

steps = [{'title' =>'abc','content' =>'click this', 'target' => 'bca'}]
tours = ['id'=>'tour', 'steps:' => "#{steps}"]
puts tours

Getting following output :

{"id"=>"tour", "steps:"=>"[{\"title\"=>\"abc\", \"content\"=>\"click this\", \"target\"=>\"bca\"}]"}

The structure of the output is right but i don't want these \ in the output. What should i do to remove these \. Thanks!

Upvotes: 1

Views: 178

Answers (2)

Richard Peck
Richard Peck

Reputation: 76784

Зелёный has the direct answer for you, however, there's a more pressing issue I would point out -- I think you're getting confused between {hashes} and [arrays]

--

An array is a set of unordered data:

array = [3, 4, 5, 6, 0, 5, 3, "cat", "dog"]

Arrays are mainly used for non-sequential collections of data, a good example being product_ids in a shopping cart.

Arrays can only be identified by using the location of the data inside the array:

array[1] # -> 4
array[2] # -> 5

--

A hash is a collection of key:value pairs:

hash = {name: "Greg", type: "cat"}

Hashes are used when you wish to assign multiple values to a single piece of data, and can be called by referencing the "key" of the hash:

hash["name"] #-> Greg
hash["type"] #-> cat

Whilst you can create an array of hashes:

 hash_array = [{name: "Greg", type: "cat"}, {name: "Sulla", type: "Dog"}]

... the problem with this is that you cannot call the hashes directly - they have to be through the array:

 hash_array["name"] # -> error
 hash_array[0]["name"] #-> "Greg"

Thus, I'd use the following in your example:

steps = {'title' =>'abc','content' =>'click this', 'target' => 'bca'}
tours = {id: 'tour', steps: steps}
tours.inspect #-> { id: "tour", steps: { "title" => "abc", "content" => "click this", "target" => "bca" }

Upvotes: 0

Roman Kiselenko
Roman Kiselenko

Reputation: 44370

In ruby "#{}" invoke the to_s method on the object. You can check it run the following code: steps.to_s.

Just use:

tours = ['id'=>'tour', 'steps:' => steps]

Because this: 

"[{\"title\"=>\"abc\", \"content\"=>\"click this\", \"target\"=>\"bca\"}]"

is a string representation of:

[{'title' =>'abc','content' =>'click this', 'target' => 'bca'}]

Upvotes: 2

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