统计字符串中出现的字母

统计字符串中出现的字母

let str = "aabbabbbcchhddfgh";
let obj = {};
for(var v of str){

    if(obj[v]&&obj[v].value == v){
        obj[v].count = ++obj[v].count;
    }else{
        obj[v] = {};
        obj[v].count = 1;
        obj[v].value = v;
    }
}

for(key in obj){
    console.log(obj[key].value + '=' + obj[key].count + '');