Function differenceWithKey

differenceWithKey<K, V1, V2 = V1>(
    combiner: (
        key: K,
    ) => (leftValue: V1) => (rightValue: V2) => Option.Option<V1>,
): (left: Map<K, V1>) => (right: Map<K, V2>) => Map<K, V1>
Makes a difference left - right immutably like difference, but you can replace the element instead of removing.
Type Parameters
- K
- V1
- V2 = V1
Parameters
- combiner: (key: K) => (leftValue: V1) => (rightValue: V2) => Option.Option<V1>
  Function to determine how the item to be updated. Values related to the key in left and right will be passed to this. Also the key will be passed to.
Returns (left: Map<K, V1>) => (right: Map<K, V2>) => Map<K, V1>
A new Map with the entries merged by combiner.
- Defined in src/map.ts:630