What are some examples of enumerations in Ruby?

What are some examples of enumerations in Ruby?

In Ruby, enumerations are used to iterate over collections. For example, you can use methods like each, map, and select.

Can you give me a specific example using an array?

Sure! Here's an example:

fruits = ['apple', 'banana', 'cherry']
fruits.each do |fruit|
  puts fruit.upcase
end

This will print each fruit in uppercase.

What about using a hash?

Absolutely! Here's how you can use each with a hash:

colors = { red: '#FF0000', green: '#00FF00', blue: '#0000FF' }
colors.each do |color, hex|
  puts "#{color}: #{hex}"
end

This will print each color with its corresponding hex value.

Are there any other useful enumeration methods?

Yes! Some other useful methods include map, select, and reject. Each serves different purposes for transforming or filtering collections.