- Ruby hashes are comparable to Javascript objects or dictionaries in languages like Python.
- Hashes contain items that are stored by
key: value pairs.
- Ruby hashes can be created using the following methods:
my_hash = {}my_hash = Hash.new
- There are many methods built into Ruby to find information from and update hashes.
my_hash = {'name' => 'Batman', 'age' => 25}
# is equivalent to:
my_hash = Hash.new
my_hash['name'] = 'Batman'
my_hash['age'] = 25
# Both of these examples return:
{"name"=>"Batman", "age"=>25}# here is an alternative way to create the array:
{name: 'Batman', age: 25}
# this example return:
{:name=>"Batman", :age=>25}
# learn more about [symbols here](http://www.randomhacks.net/2007/01/20/13-ways-of-looking-at-a-ruby-symbol/)