spreadsheet/ruleJS.all.full.js
function (type, exp1, exp2) {
      var result;

      switch (type) {
        case '&':
          result = exp1.toString() + exp2.toString();
          break;
      }
      return result;
    }
function (type, exp1, exp2) {
      var result;

      switch (type) {
        case '&':
          result = exp1.toString() + exp2.toString();
          break;
      }
      return result;
    }
function ( type , exp1 , exp2 ) { var result ; switch ( type ) { case '&' : result = exp1 . toString ( ) + exp2 . toString ( ) ; break ; } return result ; }
match special operation
@param {String} type
@param {String} exp1
@param {String} exp2
@returns {*}
match special operation