Function union

union<K, V>(left: Map<K, V>): (right: Map<K, V>) => Map<K, V>
Combines two Maps into another one. If there are duplicate keys, the ones in left will take precedence.
Type Parameters
- K
- V
Parameters
- left: Map<K, V>
  Left hand side to be combined, taking precedence.
Returns (right: Map<K, V>) => Map<K, V>
A new Map with entries came from both of them.
- Defined in src/map.ts:514