微服务架构 云计算 重构 -改变既有代码的设计 ---- 笔记(8)

to

    class Gamma...
        private final Account _account;
        private int inputVal;
        private int quantity;
        private int yearToDate;
        private int importantValue1;
        private int importantValue2;
        private int importantValue3;

        Gamma (Account source, int inputValArg, int quantityArg, int yearToDateArg) {
            _account = source;
            inputVal = inputValArg;
            quantity = quantityArg;
            yearToDate = yearToDateArg;
        }

        int compute () {
            importantValue1 = (inputVal * quantity) + _account.delta();
            importantValue2 = (inputVal * yearToDate) + 100;
            if ((yearToDate - importantValue1) > 100)
            importantValue2 -= 20;
            int importantValue3 = importantValue2 * 7;
            // and so on.
            return importantValue3 - 2 * importantValue1;
        }

        int gamma (int inputVal, int quantity, int yearToDate) {
            return new Gamma(this, inputVal, quantity,yearToDate).compute();
        }

你想更换一个更为清晰高效的算法

    String foundPerson(String[] people){
        for (int i = 0; i < people.length; i++) {
            if (people[i].equals ("Don")){
                return "Don";
            }
            if (people[i].equals ("John")){
                return "John";
            }
            if (people[i].equals ("Kent")){
                return "Kent";
            }
        }
        return "";
    }

to

    String foundPerson(String[] people){
        List candidates = Arrays.asList(new String[] {"Don", "John","Kent"});
    for (int i = 0; i<people.length; i++)
        if (candidates.contains(people[i]))
            return people[i];
    return "";
    }

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