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Crystal Clear
1,833 PointsHelp with Hashes in Ruby
I am unsure about how to hashes in Ruby, and my code isn't working. Can someone please tell me what is the purpose of Hashes in Ruby, and why the code isn't running. Thanks in advance.
grocery_item = { "item" => "Bread", "quantity" => 1, "brand" => "Treehouse Bread Company" }
calories = { "calories" => 100 }
final_item.merge({'grocery_item.inspect'})
final_item.store({'calories' => 100})
1 Answer
Grace Kelly
33,990 PointsHi Crystal, in order to merge two hashes together we use the merge method. We have a hash called grocery_item and a hash called calories. In order to merge these two we can simply do the following:
grocery_item = { "item" => "Bread", "quantity" => 1, "brand" => "Treehouse Bread Company" }
calories = { "calories" => 100 }
final_item = grocery_item.merge(calories) #merge the calories hash with the grocery_item hash
A hash is a collection of key-value pairs. It's similar to an array but unlike arrays, hashes can have arbitrary objects as indexes ("calories" => 100) while arrays have can only have integers (calories[0] = 100). There's an excellent explanation on hashes here.
Hope that helps!!