function validateStr(val){ ???let obj = {}; ???let maxNum = -1; ???let maxStr; ???for(let i=0;i<val.length;i++){ ???????if(!obj[val[i]]){ ???????????obj[val[i]] = 1; ???????????if( obj[val[i]]>maxNum){ ???????????????maxNum = obj[val[i]]; ???????????????maxStr = val[i]; ???????????} ???????}else{ ???????????obj[val[i]]++; ???????????if( obj[val[i]]>maxNum){ ???????????????maxNum = obj[val[i]]; ???????????????maxStr = val[i]; ???????????} ???????} ???} ???return{ ???????maxNum, ???????maxStr ???}}js-检测字符串出现次数最多，并返回
原文地址：https://www.cnblogs.com/huangmin1992/p/10152594.html