请教if else 嵌套的写法 是if{}else{if{} else{}} 还是if{} else if{} else{} - V2EX
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avatasia

请教if else 嵌套的写法 是if{}else{if{} else{}} 还是if{} else if{} else{}

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  •   avatasia Feb 24, 2012 8084 views
    This topic created in 5185 days ago, the information mentioned may be changed or developed.
    假如判断两个参数值 _qType, _qValue。_qValue为空的时候处理一种情况,不为空的话,根据_qType的值做相应处理。
    两种写法
    1 if(_qValue == "")
    {
    }
    else
    {
    if(_qType == 0)
    {
    }
    else
    {
    }
    }

    2 if(_qValue == "")
    {
    }
    else if(_qType == 0)
    {
    }
    else
    {
    }
    两种哪个标准些,为什么?
    8 replies    1970-01-01 08:00:00 +08:00
    xsmile
        1
    xsmile  
       Feb 24, 2012
    第2种
    TheOnly92
        2
    TheOnly92  
       Feb 24, 2012
    第一个写法nest的较深,当你要检查的参数增加的时候就会相当悲剧。
    xsmile
        3
    xsmile  
       Feb 24, 2012
    另外,这语句写的和你描述的有点问题
    xsmile
        4
    xsmile  
       Feb 24, 2012
    也不算是什么问题,当我没说
    Alex_L
        5
    Alex_L  
       Feb 24, 2012
    个人感觉两种比较别扭第二种好些。按照问题描述的情况应该新定义一函数吧。
    raptium
        6
    raptium  
       Feb 24, 2012
    这两个写法的区别是什么?
    zythum
        7
    zythum  
       Feb 24, 2012
    如果支持elseif的话就直接写
    如果不支持的话还是第一种方法比较好。感觉。
    ywjno
        8
    ywjno  
       Feb 24, 2012
    我用switch case
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