set
Insert a new key-value pair into the receiver, replacing any existing value associated with the specified key.
Return
The value previously associated with key, if any.
Parameters
key
The search key.
value
The payload to associate with the key.
Insert a new key-value pair into the receiver, replacing any existing value associated with the specified key.
The value previously associated with key, if any.
The search key.
The payload to associate with the key.