代码重构之以查询取代临时变量

意图

- 使得同一个类中的所有函数都可以获得这份信息，能够为这个类编写更清晰的代码

示例

/**
 * 以查询取代临时变量之前
 * Created by luo on 2017/4/19.
 */
public class ReplaceTempWithQueryBefore {
    private double _quantity;
    private double _itemPrice;

    public double test() {
        double basePrice = _quantity * _itemPrice;
        if (basePrice > 1000) {
            return basePrice * 0.95;
        } else {
            return basePrice * 0.98;
        }
    }
}
/**
 * 以查询取代临时变量之后
 * Created by luo on 2017/4/19.
 */
public class ReplaceTempWithQueryAfter {
    private double _quantity;
    private double _itemPrice;

    public double test() {
        if (basePrice() > 1000) {
            return basePrice() * 0.95;
        } else {
            return basePrice() * 0.98;
        }
    }

    private double basePrice() {
        return _quantity * _itemPrice;
    }

}