查找字符.js

 function strSearch(defaultStr,searchStr){
        var arr = [],
            i = 0,
            num = 0;
            length = defaultStr.length;
        for(i; i<length; i++) {
            //查找字符
            if(defaultStr.indexOf(searchStr,i) != -1) {
                num++;
                i = defaultStr.indexOf(searchStr,i);
                arr.push(i);     
            }
        }
        return {
            num :"你查找的"+searchStr+"次数为："+num,
            arr : "出现的位置："+arr
        };
    }
    console.log(strSearch("sdasadasd","s"));