Function transformMap

Like Array.map, but for a Map. Transforms from Map<K,V> to Map<K,R>, returning as a new Map.

Example

const mapOfStrings = new Map();
mapOfStrings.set(`a`, `10`);
mapOfStrings.get(`a`); // Yields `10` (a string)

// Convert a map of string->string to string->number
const mapOfInts = transformMap(mapOfStrings, (value, key) => parseInt(value));

mapOfInts.get(`a`); // Yields 10 (a proper number)

If you want to combine values into a single object, consider instead mapToObjectTransform.

transformMap<K, V, R>(source, transformer): Map<K, R>
Type Parameters
- K
  Type of keys (generally a string)
- V
  Type of input map values
- R
  Type of output map values
Parameters
- source: ReadonlyMap<K, V>
- transformer: ((value: V, key: K) => R)
  - - (value, key): R
    - Parameters
      value: V
      key: K
      Returns R
Returns Map<K, R>