对入参进行赋值

int discount(int inputVal, int quantity, int yearToDate) {if (inputVal > 50) {inputVal -= 2;}
}

重构：用一个临时变量取代该参数

int discount(int inputVal, int quantity, int yearToDate) {int result = inputVal;if (inputVal > 50) {result -= 2;}
}

什么是“对参数赋值”

void method(Object foo) {foo.modifyInSomeWay();  //that's OKfoo = anotherObject;	// trouble and despair will follow you.
}