allergies_challenge_in_java.md

Allergies challenge

An allergy test produces a single numeric score which contains the information about all the allergies the person has (that they were tested for).

The list of items (and their value) that were tested are:

• eggs (1)
• peanuts (2)
• shellfish (4)
• strawberries (8)
• tomatoes (16)
• chocolate (32)
• pollen (64)
• cats (128)

So if Tom is allergic to peanuts and chocolate, he gets a score of 34.

Write a program that, given a person's score can tell them:

a) whether or not they're allergic to a given item, and

b) the full list of allergies

Allergies tom = new Allergies(34);
tom.allergic_to('chocolate');
=> true
tom.allergic_to('cats');
=> false
tom.list();
=> ['peanuts', 'chocolate']