"<" "<" 这两个字符串有什么不同? - V2EX
roshad

"<" "<" 这两个字符串有什么不同?

  •  
  •   roshad Jul 25, 2018 3257 views
    This topic created in 2849 days ago, the information mentioned may be changed or developed.

    我测试这个 bug 很久,最后才发现字符串不一样,每个字符都是一样的,合在一起就不一样了,这是什么原因导致的?

    17 replies    2018-07-26 10:33:54 +08:00
    roshad
        1
    roshad  
    OP
       Jul 25, 2018
    含有不可见数据,测试出来了.
    roshad
        2
    roshad  
    OP
       Jul 25, 2018
    接下去就是找谁想整我了
    fe619742721
        3
    fe619742721  
       Jul 25, 2018
    不可见字符一般是 excel 导入的时候带进来的吧
    blankme
        4
    blankme  
       Jul 25, 2018
    "&<200b>lt;" "&lt;"
    ysc3839
        5
    ysc3839  
       Jul 25, 2018 via Android
    零宽空格
    &#8203;
    FanWall
        6
    FanWall  
       Jul 25, 2018 via Android
    这只能整到不会写代码的人吧
    icp
        7
    icp  
       Jul 25, 2018
    WordTian
        8
    WordTian  
       Jul 25, 2018 via Android
    这种 bug 很难找啊,楼主是怎么找出来的?
    roshad
        9
    roshad  
    OP
       Jul 25, 2018
    @WordTian 与上个版本能用的代码一行行比对的
    akira
        10
    akira  
       Jul 25, 2018
    一般遇到这种问题,肯定是某个地方有不可见字符。
    直接整行删除重新手打。
    rocbomb
        11
    rocbomb  
       Jul 25, 2018
    我前几天也就遇到一次, 直接看二进制就行了
    sublime File->reopen->hexadecimal
    或者 utral edit
    都可以
    roshad
        12
    roshad  
    OP
       Jul 25, 2018
    估计是有人趁我喝水按了个 alt8203
    zhuanzh
        13
    zhuanzh  
       Jul 25, 2018 via Android
    @roshad 顺便问问 为啥 alt+数字 有时候是 unicode 有时候是 gbk 比如在记事本和 doc 里不同
    roshad
        14
    roshad  
    OP
       Jul 25, 2018
    edsion996
        15
    edsion996  
       Jul 25, 2018 via Android
    零宽空格我遇到过,网上说某些 PHP 项目带进来的。

    用 pycharm 打断点的话,可以看得出来
    580a388da131
        16
    580a388da131  
       Jul 25, 2018 via Android   1
    你想要开启显示不可见字符,这东西现在有人拿来做指纹追溯。
    geying
        17
    geying  
       Jul 26, 2018
    能发现这个也是厉害
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