Cartoon Collections - Part 1

Learning Goals

• Get familiar iterating through arrays with the each Enumerable and its variants

Instructions

There are two methods to complete in this lab:

1. greet_characters
2. list_dwarves

Write these methods in cartoon_collections.rb using the details below. Use learn to test your solutions.

Method 1 — greet_characters

Create a method called greet_characters that takes one parameter, an Array of Strings. This method should iterate over this array and use the elements to print out a custom greeting for each.

If we were to pass in the following array, for instance:

characters_array = ["Hoggle", "Ludo", "Sir Didymus"]

greet_characters(characters_array) should output the following:

Hello Hoggle!
Hello Ludo!
Hello Sir Didymus!

Use each to interpolate the elements of the array into a string. Check out the Ruby documentation for additional guidance.

Method 2 — list_dwarves

The list_dwarves method is similar to the greet_characters, but with a slight variation. This method should accept an Array of Strings. The method should interpolate each string and print it out like last time. However, this time, we need to list out the position of each element being printed as well.

For example, if we had the following:

dwarves_array = ["Gimli", "Thorin", "Balin", "Gloin"]

list_dwarves(dwarves_array) should output:

1. Gimli
2. Thorin
3. Balin
4. Gloin

For this, using each won't work. Instead, take a look at the documentation for each_with_index and use the information to help you implement this method.

Hint: The first element of an array is always at an index of 0, but the list above starts with 1 for human readability.

Use learn to check your progress and learn submit to submit your work when finished.

Conclusion

Using each is a good way to get familiar with how Enumerables work. When we're first learning to speak, we might refer to all dogs as dogs, and we'll technically be correct. From there, we might start learning to differentiate - some dogs are retrievers, and others are dachshunds. As mentioned previously, each can be used to complete all sorts of tasks. Now that we have an understanding of it, we can start to learn some of the more expressive alternatives.

Resources

• The .each_with_index method

View Cartoon Collections Lab on Learn.co and start learning to code for free.