!~操作符是什么意思啊

congkk

手册上面好像找不到有这个符号介绍， 麻烦大家指教一下。

kk861123

not match

bikong0411

不匹配

jason680

回复 1# congkk

equal and not equal ( == and !=)
match and not match ( =~ and !~)


$ perldoc perlretut

NAME
       perlretut - Perl regular expressions tutorial

DESCRIPTION
       This page provides a basic tutorial on understanding, creating and
       using regular expressions in Perl.  It serves as a complement to the
       reference page on regular expressions perlre.  Regular expressions are
       an integral part of the "m//", "s///", "qr//" and "split" operators and
       so this tutorial also overlaps with "Regexp Quote-Like Operators" in
       perlop and "split" in perlfunc.
   
       ...
       ...
           if ("Hello World" =~ /World/) {
               print "It matches\n";
           }
           else {
               print "It doesn't match\n";
           }

       There are useful variations on this theme. The sense of the match can
       be reversed by using the "!~" operator:

           if ("Hello World" !~ /World/) {
               print "It doesn't match\n";
           }
           else {
               print "It matches\n";
           }

wonderall01

不匹配，