Date扩展 正则匹配

<script>

  Date.prototype.format=function(){

      var d=this;

      //严格匹配 yyyy-mm-dd hh-mm-ss

      var reg1=/yyyy-mm-dd hh-m-s/;

      //匹配 yyyy*mm*dd hh*mm*ss  *为任意一个除\r\n之外的字符 中间为任意多个空格

      var reg2=/y{4}.m{2}.dd\s+hh.mm.ss/;

      reg1.test(arguments[0]);

      reg2.test(arguments[0]);

      return d.getFullYear()+'-'

              + d.getMonth()+'-'

              + d.getDate()+' '

              + d.getHours()+'-'

              + d.getMinutes()+'-'

              + d.getSeconds();

  };

  var date=new Date();

  console.log(date.format('yyyy—mm-dd hh-mm-ss'));

  console.log(date);

  var str='oooo';

  var reg3=/o+/,reg4=/o+?/;

  console.log(reg3.exec(str));

  console.log(reg4.exec(str));

  console.log(str.match(reg4));

</script>