js对字符串的处理--查找,合并,截取

var s3 = "u/baojun/离退休办事处-包军";

var first = s3.lastIndexOf('/');//查找最后一个'/'的索引

var last = s3.lastIndexOf('-');

var s1 = s3.substring(0,first+1);//截取字符串[0,first+1)

var s2 = s3.substring(last+1,s3.length);//截取字符串[last+1,s3.length)

var result = s1 + s2 ;//合并字符串