Enumerables Lab

Learning Goals

Practice using common enumerable methods like #each, #map, #find, and #filter with arrays

Instructions

In the enumerables.rb file, there is an array of hashes representing different spicy foods:

# this method returns an array of hashes, which we'll use in the other methods
def spicy_foods
  [
    { name: 'Green Curry', cuisine: 'Thai', heat_level: 9 },
    { name: 'Buffalo Wings', cuisine: 'American', heat_level: 3 },
    { name: 'Mapo Tofu', cuisine: 'Sichuan', heat_level: 6 },
  ]
end

Practice using Ruby enumerable methods to solve these deliverables. You could use #each to solve all of these, but try to expand your toolkit and use some other enumerable methods to make the job easier, like #map, #select, and #find.

#get_names

Define a method #get_names, takes an array of spicy_foods and returns an array of strings with the names of each spicy food.

get_names(spicy_foods)
# => ["Green Curry", "Buffalo Wings", "Mapo Tofu"]

#spiciest_foods

Define a method #spiciest_foods that an array of spicy_foods and returns an array of hashes where the heat level of the food is greater than 5.

spiciest_foods(spicy_foods)
# => [{ name: 'Green Curry', cuisine: 'Thai', heat_level: 9 }, { name: 'Mapo Tofu', cuisine: 'Sichuan', heat_level: 6 }]

#print_spicy_foods

Define a method #print_spicy_foods that takes an array of spicy_foods and output to the terminal each spicy food in the following format using #puts: Buffalo Wings (American) | Heat Level: 🌶🌶🌶.

HINT: you can use times (*) with a string to produce the correct number of "🌶" emoji.

For example: "hello" * 3 == "hellohellohello"

print_spicy_foods(spicy_foods)
# Green Curry (Thai) | Heat Level: 🌶🌶🌶🌶🌶🌶🌶🌶🌶
# Buffalo Wings (American) | Heat Level: 🌶🌶🌶
# Mapo Tofu (Sichuan) | Heat Level: 🌶🌶🌶🌶🌶🌶

#get_spicy_food_by_cuisine

Define a method get_spicy_food_by_cuisine that takes an array of spicy_foods and a string representing a cuisine, and returns a single hash for the spicy food whose cuisine matches the cuisine being passed to the method.

get_spicy_food_by_cuisine(spicy_foods, "American")
# => { name: 'Buffalo Wings', cuisine: 'American', heat_level: 3 }

get_spicy_food_by_cuisine(spicy_foods, "Thai")
# => { name: 'Green Curry', cuisine: 'Thai', heat_level: 9 }

#sort_by_heat

Define a method #sort_by_heat that takes an array of spicy_foods and returns an array of hashes sorted by heat level from lowest to highest:

sort_by_heat(spicy_foods)
# => [
#   { name: 'Buffalo Wings', cuisine: 'American', heat_level: 3 },
#   { name: 'Mapo Tofu', cuisine: 'Sichuan', heat_level: 6 },
#   { name: 'Green Curry', cuisine: 'Thai', heat_level: 9 }
# ]

#print_spiciest_foods

Define a method #print_spiciest_foods that takes an array of spicy_foods and outputs to the terminal ONLY the spicy foods that have a heat level greater than 5, in the following format: Buffalo Wings (American) | Heat Level: 🌶🌶🌶. Try to use methods you've already written to solve this!

print_spiciest_foods(spicy_foods)
# Green Curry (Thai) | Heat Level: 🌶🌶🌶🌶🌶🌶🌶🌶🌶
# Mapo Tofu (Sichuan) | Heat Level: 🌶🌶🌶🌶🌶🌶

#average_heat_level

Define a method #average_heat_level that takes an array of spicy_foods and returns an integer representing the average heat level of all the spicy foods in the array. Recall that to derive the average of a collection, you need to calculate the total and divide number of elements in the collection.

HINT: you can solve this using each, or try the sum method with a block, to get the total spice level.

average_heat_level(spicy_foods)
# => 6

Resources

Enumerable documentation

e-nk/phase-3-enumerables-lab