Flowdock
method

merge!

Importance_1
merge!(hash, key, value) private

Adds a new key/value pair to an existing Hash. If the key to be added already exists and the existing value associated with key is not an Array, it will be wrapped in an Array. Then the new value is appended to that Array.

hash:Hash to add key/value pair to.
key:Key to be added.
value:Value to be associated with key.
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