Knockoutjs add array of items to observableArray

gistfile1.txt

ko.observableArray.fn.pushAll = function (valuesToPush) {
		var underlyingArray = this();
		this.valueWillMutate();
		ko.utils.arrayPushAll(underlyingArray, valuesToPush);
		this.valueHasMutated();
		return this;
	};
	
	var viewModel = {
		valuesArray : ko.observableArray([])
	};

	ko.applyBindings(viewModel);
	
	//push a new array onto the existing one
	viewModel.valuesArray.pushAll([{}, {}]);