rsplit函数

类似split函数，但保留切割符。

var rsplit = function( string, regex ) {

          var result = regex.exec(string),

          retArr = [],

          first_idx, last_idx;

          while ( result !== null ) {

            first_idx = result.index;

            last_idx = regex.lastIndex;

            if ( first_idx !== 0 ) {

              retArr.push(string.substring(0, first_idx));

              string = string.slice(first_idx);

            }

            retArr.push(result[0]);

            string = string.slice(result[0].length);

            result = regex.exec(string);

          }

          if ( string !== '' ) {

            retArr.push(string);

          }

          return retArr;

        };

var rsplit = function(str,reg){

    var result = [], i =0 ,left;

     while(reg.exec(str)){

           left = RegExp.leftContext;

           if(left){

              result[i++] = left;

           }

           result[i++] = RegExp.lastMatch;

           str = RegExp.rightContext;

     }

     if(str){

        result[i++] = str

     }

       return result;

}

用法:

var  name = 'example.projectrepo.pkg2'

alert(rsplit(name,/\./g)) //example,.,projectrepo,.,pkg2

如果您觉得此文有帮助，可以打赏点钱给我支付宝1669866773@qq.com ，或扫描二维码