How-to Create an Array of Hashes in Ruby
New to Ruby and I'm Trying to Create an Array of Hashes (Or Do I Have It Backwards?) Def Collection Hash = { "Firstname" => "Mark", "Lastname" => "Martin"...
New to ruby and I'm trying to create an array of hashes (or do I have it backwards?)
def collection
hash = { "firstname" => "Mark", "lastname" => "Martin", "age" => "24", "gender" => "M" }
array = []
array.push(hash)
@collection = array[0][:firstname]
end
@collection does not show the firstname for the object in position 0... What am I doing wrong?
Thanks in advance!
3 Answers
You're using a Symbol as the index into the Hash object that uses String objects as keys, so simply do this:
@collection = array[0]["firstname"]
I would encourage you to use Symbols as Hash keys rather than Strings because Symbols are cached, and therefore more efficient, so this would be a better solution:
def collection
hash = { :firstname => "Mark", :lastname => "Martin", :age => 24, :gender => "M" }
array = []
array.push(hash)
@collection = array[0][:firstname]
end
You have defined the keys of your hash as String. But then you are trying to reference it as Symbol. That won't work that way.
Try
@collection = array[0]["firstname"]
You can do this:
@collection = [{ "firstname" => "Mark", "lastname" => "Martin", "age" => "24", "gender" => "M" }]
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