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Ruby Ruby Collections Ruby Hashes Working with Hash Values

Dmitriy Kavyazin
Dmitriy Kavyazin
15,624 Points
Posted by Dmitriy Kavyazin
Dmitriy Kavyazin
15,624 Points

Stuck on this question, what am I doing wrong?

Using the has_value? method, check to see if the grocery_item hash has a value called "Bread". If it does, set a new key in the hash called "food" with the value of true.

hash.rb 
grocery_item = { "item" => "Bread", "quantity" => 1, "brand" => "Treehouse Bread Company" }
if grocery_item.has_value?("Bread")
  hash.store("food", "true")
end

5 Answers

Maciej Czuchnowski
Maciej Czuchnowski
36,441 Points
Maciej Czuchnowski
Maciej Czuchnowski
36,441 Points

I'm not sure what hash means in your example. Also, true should be a boolean, not a string.

if grocery_item.has_value?("Bread")
  grocery_item.store("food", true)
end
Dmitriy Kavyazin
Dmitriy Kavyazin
15,624 Points
Dmitriy Kavyazin
Dmitriy Kavyazin
15,624 Points

Oh boy. Noob mistake. Thanks.

Niristotle Okram
Niristotle Okram
2,000 Points
Niristotle Okram
Niristotle Okram
2,000 Points

Why doesn't it like this grocery_item.store("food", "true")

Maciej Czuchnowski
Maciej Czuchnowski
36,441 Points
Maciej Czuchnowski
Maciej Czuchnowski
36,441 Points

"true" is a string, while true is a boolean value.

Naya Moss
Naya Moss
9,894 Points
Naya Moss
Naya Moss
9,894 Points

Thanks @Maciej Czuchnowski but, my issue with this is how did you know to use .store? When I tried to use .company, that didn't work.

Maciej Czuchnowski
Maciej Czuchnowski
36,441 Points
Maciej Czuchnowski
Maciej Czuchnowski
36,441 Points

Naya, Jason uses this method in one of the previous videos:

http://teamtreehouse.com/library/ruby-collections/ruby-hashes/working-with-hash-keys

around 4:08, as well as in the teacher's notes under that video. There is no built-in method .company in Ruby as far as I know.

Tome Perica
Tome Perica
14,604 Points
Tome Perica
Tome Perica
14,604 Points

Task 1

grocery_item = { "item" => "Bread", "quantity" => 1, "brand" => "Treehouse Bread Company" }
grocery_item.has_value?("Bread")
grocery_item.store("food", true)

Task 2

Just add this line of code

grocery_list = grocery_item.values_at("item")
Ivan Kusakovic
Ivan Kusakovic
12,197 Points
Ivan Kusakovic
Ivan Kusakovic
12,197 Points

What are these hashes? I don't understand it very well, do you have some other interactive tutorials on hashes in Ruby? :) Thanks

Daria Khaylova
Daria Khaylova
5,945 Points
Daria Khaylova
Daria Khaylova
5,945 Points

Challenge Task 2 of 2

Use the values_at method on the grocery_item hash to get an array consisting of a single value: the value of the "item" key. Store the returned array in a variable named grocery_list:

grocery_item = { "item" => "Bread", "quantity" => 1, "brand" => "Treehouse Bread Company" }
if grocery_item.has_value?("Bread")
  grocery_item.store("food", true)
end

grocery_list = grocery_list.values_at("item")

And it says 'Oops! It looks like Task 1 is no longer passing.' Why?

Rick O'Connell
Rick O'Connell
2,505 Points

You are using the new variable "grocery_list" in the definition. Change "grocery_list.values_at("item")" to "grocery_item.values_at("item")