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Amusement Park Improvements
Amusement Park Improvements

Amusement Park Improvements

Learning Exercise

Introduction

True and False

True and false logical states are represented with true and false in Ruby.

happy = true
sad = false

Equality and comparison

Ruby allows you to compare objects to each other using the normal equality symbols:

  • Use == to see if two objects are equal
  • Use > to see if the object on the left is greater than the object on the right
  • Use < to see if the object on the left is less than the object on the right.
  • Use >= or <= to test for "greater than or equal to" and "less than or equal to" respectively.

You can also use boolean logic with the normal operators:

  • Use && or and to check if x and y are true
  • Use || or or to check if x or y is true.
  • Use ! or not to invert equality - e.g. x != y (x does not equal y)

Here are some examples:

# Is "true equal to false"? 
true == false # false

# Is "true not equal to false"
true != false # true

# Is 5 greater than 4?
5 > 4 # true

# Is 3 less than or equal to 2?
3 <= 2 # false

Instructions

Continuing your work with the amusement park, you are tasked with writing some utility methods to facilitate checking if an attendee can use a ride.

1. Check if an attendee has a ride pass

Implement the Attendee#has_pass? method to return a boolean (true/false) value based on the presence of a ride pass.

Attendee.new(100).has_pass?
# => false

2. Check if an attendee fits a ride

Implement the Attendee#fits_ride? method to see if an attendee fits a ride based on their height. The ride's required minimum height is provided as an argument. An attendee must have height greater than or equal to ride's required minimum height.

Attendee.new(140).fits_ride?(100)
# => true

3. Check if an attendee is allowed to ride

Implement the Attendee#allowed_to_ride? method to see if an attendee is allowed to go on a ride. The ride's required minimum height is provided as an argument. An attendee must have a ride pass and be able to fit the ride.

attendee = Attendee.new(100)
attendee.issue_pass!(42)
attendee.allowed_to_ride?(120)
# => false
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