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Ruby Ruby Collections Ruby Hashes Working with Hash Values

Posted by Leonardo Escalante
Leonardo Escalante
3,190 Points

Code challenge : has_value? method

I have problems in this code challenge. Here is my code:

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

Please help me with that.

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

3 Answers

Arturo Alviar
Arturo Alviar
15,739 Points
Arturo Alviar
Arturo Alviar
15,739 Points

Hi Leonardo,
What you want to do in your code is add a conditional statement
The has_value? function returns a boolean so you should use that to determine whether to add food or not
Another thing, you are not adding food as a key to the hash. All you are doing is setting a variable name food to the value of true.

Here is how I approached it: 

#only add food as a key if there is a key named Bread in the grocery_item hash
grocery_item["food"] = true if grocery_item.has_value?("Bread")

Hope that helps!

Christie Metson
Christie Metson
10,837 Points
Christie Metson
Christie Metson
10,837 Points

Yes, helps heaps thank you :)

Christie Metson
Christie Metson
10,837 Points
Christie Metson
Christie Metson
10,837 Points

Thanks Arturo, that worked great! Do you by any chance know why it didn't work for me when I had my code round the other way? Here's how I had it:

if grocery_item.has_value?("Bread") grocery_item["food"] = true

Arturo Alviar
Arturo Alviar
15,739 Points
Arturo Alviar
Arturo Alviar
15,739 Points

That is because you cannot assign a statement a value.
What your code is trying to do there is set if grocery_item.has_value?("Bread") grocery_item["food"] to have the value true. That is an illegal statement.
As you know, we want grocery_item["food"] to have the value true. That is why that goes first. Another way to write it would be 

if grocery_item.has_value?("Bread") 
   grocery_item["food"] = true
end

Hope this helps!