javascript - Why does this reg exp always succeed for the numerics? -


I have a regular expression that searches for special characters.

When I search numbers, like 3, I always get 0, when I was expecting to get -1. 

  '3' Search (/ [! \ "£ \ $% ^ ^ & amp; \ * \ (\) -_ \ + = \ [\] \ {\} :: @ \" # \\ |

Any idea why this is happening? 

  \) -_

to all the character class between ) and _ Causes the inclusion of characters, i.e. ) * +, - / .123456789:; & lt; = & gt;? @ ABCDGGHJJLMNOPQRTUVXX [\] ^ _ . 3 Is one of them.

- should be placed at the beginning or at the end, so that it is special In addition, \ , [, ] and / , do not count as a category. There is no need to avoid anything in it. 

  / [-! "£ $% ^ & amp; * () _ + = \ [\] {}:: @ '# \\ | & Lt ;, & gt; (Technically  [ does not need to be avoided, but I like to save it continuously.) Also , You can match a  -  in the meter if you avoid it from  \ - .)

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