External module "utils/for-in/docs/types/index.d"

Export assignment forIn

• forIn(obj: any, fcn: Function, thisArg?: any): any

• Invokes a function once for each own and inherited enumerable property of an object.

  Notes

  • When invoked, the function is provided three arguments:

    • value: object property value
    • key: object property
    • obj: the input object

  • To terminate iteration before visiting all properties, the provided function must explicitly return false.

  • Iteration order is not guaranteed.

  Parameters

  • obj: any

    input object

  • fcn: Function

    function to invoke

  • Optional thisArg: any

    execution context

  Returns any

  obj - input object

  Example

  function log( v, key ) {
      console.log( '%s: %d', key, v );
  }
  
  function Foo() {
      this.a = 1;
      this.b = 2;
      return this;
  }
  
  Foo.prototype.c = 3;
  Foo.prototype.d = 4;
  
  var obj = new Foo();
  
  forIn( obj, log );