RegExp实例方法
1.exec()
var txt = 'mom and dady and baby';
var pattern = /mom(and dady(and baby)?)?/gi;
matches = pattern.exec(txt);
//返回一个Array的实例,但包含两个index,和input两个属性
1.exec()
var txt = 'mom and dady and baby';
var pattern = /mom(and dady(and baby)?)?/gi;
matches = pattern.exec(txt);
//返回一个Array的实例,但包含两个index,和input两个属性