Chunks of code as arguments

Examine each of the following Ruby scripts. Read the code, run them, change the code; experiment with them and try to understand what is going on.

In order:

• content_tag1.rb
• content_tag2.rb
• content_tag3.rb
• for.rb

1. Think of questions!
2. Attempt to define the for_each_in method in for_each_in.rb
3. Attempt to define the select_from method in select_from.rb
4. Attempt to define the reject_from method in select_from.rb
5. Attempt to define the map_from method in map_from.rb