What are collections in Ruby on Rails?

What are collections in Ruby on Rails?

Collections in Ruby on Rails refer to data structures that hold multiple items, such as arrays and hashes.

Can you give me examples of how to use arrays in Rails?

Sure! In Rails, you can create an array like this: my_array = [1, 2, 3]. You can also use methods like map, select, and each to manipulate arrays.

What about hashes? How do they differ from arrays?

Hashes are key-value pairs, allowing you to store data in a more structured way. For example: my_hash = {name: 'John', age: 30}.

How can I iterate over a hash in Rails?

You can use the each method to iterate over a hash. For example: my_hash.each do |key, value| puts "#{key}: #{value}" end.