External module "utils/map-keys/docs/types/index.d"

Export assignment mapKeys

• mapKeys(obj: any, transform: Transform): any

• Maps keys from one object to a new object having the same values.

  Notes

  • The transform function is provided three arguments:

    • key: object key
    • value: object value corresponding to key
    • obj: the input object

  • The value returned by a transform function should be a value which can be serialized as an object key.

  • The function only maps own properties. Hence, the function does not map inherited properties.

  • The function shallow copies key values.

  • Iteration order is not guaranteed.

  Parameters

  • obj: any

    source object

  • transform: Transform

    transform function

  Returns any

  new object

  Example

  function transform( key, value ) {
      return key + value;
  }
  
  var obj1 = {
      'a': 1,
      'b': 2
  };
  
  var obj2 = mapKeys( obj1, transform );
  // returns { 'a1': 1, 'b2': 2 }