正者表達式exec和match

var reg = /\d+/g;

    var str = 'aswofde2015xsewde2016awdefer2017';

    var ary = [];

    var res = reg.exec(str);

    while(res){

      ary.push(res[0])

      res = reg.exec(str);

    }

    console.log(ary)//[2015,2016,2017]

 

 

var reg = /\d+/g;

    var str = 'aswofde2015xsewde2016awdefer2017';

var temp = str.match(reg)

console.log(temp )//[2015,2016,2017]