Method Transform

object.go:506–531

Transform runs the passed function on all the elements in the Object and returns a new object without effecting original object. The function is invoked for key value pairs sorted by keys in ascending order. Example: object := NewObject(t, []interface{}{"x": "foo", "y": "bar"}) transformedObjec

(fn func(key string, value interface{}) interface{})

//		})
//	transformedObject.IsEqual([]interface{}{"x": "FOO", "y": "BAR"})
func (o *Object) Transform(fn func(key string, value interface{}) interface{}) *Object {
	opChain := o.chain.enter("Transform()")
	defer opChain.leave()

	if opChain.failed() {
		return newObject(opChain, nil)
	}

	if fn == nil {
		opChain.fail(AssertionFailure{
			Type: AssertUsage,
			Errors: []error{
				errors.New("unexpected nil function argument"),
			},
		})
		return newObject(opChain, nil)
	}

	transformedObject := map[string]interface{}{}

	for _, kv := range o.sortedKV() {
		transformedObject[kv.key] = fn(kv.key, kv.val)
	}

	return newObject(opChain, transformedObject)
}

// Find accepts a function that returns a boolean, runs it over the object
// elements, and returns the first element on which it returned true.