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So far, we've learned how to create and modify hashes and work with hash keys. Ruby provides several ways to work with the values in a hash as well. In this video, we'll explore different ways to work with the values in a hash.
Code Samples
For the examples below, we'll be working with this hash:
hash = { "item" => "Bread", "quantity" => 1, "brand" => "Treehouse Bread Company" }
To return an array of the values in the hash, we can use the values
method:
hash.values
Which would return the following:
["Bread", 1, "Treehouse Bread Company"]
The has_value?
method takes one argument and returns true
or false
if the value is contained within the hash:
hash.has_value?("brand")
That would return false
since "brand" isn't a value. However, the following would return true
:
hash.has_value?("Bread")
The values_at
method takes several arguments and returns the hash values at the specified keys as an array:
hash.values_at("quantity", "brand")
That would return:
[1, "Treehouse Bread Company"]
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