正则里为什么[^]可以表示包括换行在内的所有字符 - V2EX
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stx0821

正则里为什么[^]可以表示包括换行在内的所有字符

  •   
  •   stx0821 Sep 21, 2020 1903 views
    This topic created in 2084 days ago, the information mentioned may be changed or developed.

    /foo[^]bar/.test('foo\nbar') // true

    以前都不知道有这种写法，查过相关资料也没有说明这种情况

  • foo
  • 正则
  • nbar'
  • 写法
    5 replies    2020-09-22 08:27:54 +08:00
    ihipop
        1
    ihipop  
       Sep 21, 2020 via Android
    你知道 ［^a ］表示什么吗？然后去掉 a 呢
    uTOmOuk3L6sb4MSI
        2
    uTOmOuk3L6sb4MSI  
       Sep 21, 2020 via iPhone
    貌似只有 Javascript 会这样，其他语言会报错
    stx0821
        3
    stx0821  
    OP
       Sep 22, 2020
    @ODD10 是啊，vscode 也会报错
    ClericPy
        4
    ClericPy  
       Sep 22, 2020
    以前一直 [\s\S]*?
    stx0821
        5
    stx0821  
    OP
       Sep 22, 2020
    @ClericPy [\s\S]是最近才知道的，以前都是(.|\n|\r)
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