Object headMap ( Object map, Object toKey )Object headMap ( Object map, Object toKey )| Name | Type | Description |
|---|---|---|
map | Object | Instance of SortedMap |
toKey | Object | High endpoint (exclusive) of the keys in the returned map |
| Type | Description |
|---|---|
Object | Instance of Map, a view of the portion of this map whose keys are strictly less than toKey. |