January 7 - Extract a Random Element from a Collection of Arrays Nested in a Hash
This coding exercise walks through how to work with the Hash data structure in Ruby. Specifically, you will learn how to select a random element from a set of nested arrays inside of a hash.
Guide Tasks
- Read Tutorial
- Watch Guide Video
- Complete the Exercise
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Summary
Build a method that takes a hash of nested arrays as an argument and outputs a random, single element.
Exercise Description
Given the following hash:
menu = {
'appetizers': ['Chips', 'Quesadillas', 'Flatbread'],
'entrees': ['Steak', 'Chicken', 'Lobster'],
'dessers': ['Cheesecake', 'Cake', 'Cupcake']
}
Build a method that returns a different random element each time it is processed.
Sample Output
"Chicken"
Real World Usage
Working with the Hash data structure is a common requirement, especially when building out Rails applications. In this exercise you'll learn how to work with nested collections and how to select elements from multiple collections.