执行以下程序,输出结果为()
var str = 'acdaecad';
var obj = {};
for (var i = 0;i<str.length;i++){
if (obj[str.charAt(i)]){
obj[str.charAt(i)]++;
}
else {
obj[str.charAt(i)] = 1;
}
}
var val1;
var val2 = 0;
for (var k in obj) {
if (obj[k] > val2){
val2 = obj[k];
val1 = k;
}
}
console.log(val1);