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Hash

inherits Iterable final

This is known collectively as a Hash, Hash Table, Dictionary and probably other names. It can be instantiated with a literal {} or statically initalized with {key: value, ...}

methods

• add(key, value) add a value to the hash with key
• remove(key) removes the value and key from the hash
• to_string() returns a String representation of the hash
• get(key, default=nil) returns the value found by key otherwise returns the default value if key doesn’t have an entry in the hash.
• has_key?(key) returns a boolean for whether the hash has the given key

operators

• == iterates through the keys and values of each hash and returns true if they have the same contents (or are the same instance)
• [] takes an object as the key and returns the associated value, e.g. hash[some_object]
• []= assigns a value to the given key, e.g. hash[some_object] = "some string"