Add new values to this container.
Returns value for the given code
Returns value for the given code
of a value
value or null if no value for a given code
Returns Some(value) for the given code if it is not null
.
Returns Some(value) for the given code if it is not null
.
of a value
Some(value) or None if no value for a given code
Store values in a sparse array (null if no value for a code)