如何将字符串添加到数组的键并获取值

Question

考虑一个数组var myarray = {first_data:{"round1":"h","round2":"i",...,"round20":"z"}second_data:{"round1":"a","round2":"b",...,"round26":"z"}}为了获得first_data中round1的值，我们使用myarray(firstdata).round1所以我需要遍历存在的各个回合，在这些回合中我只指定回合并连接迭代值for(var i=1;i<21;i++){      console.log(myarray[firstdata].round+i)}它必须返回数组中的回合值

Answer 1

您可以尝试按照以下说明从对象动态获取键

var myarray = 

{

first_data:{"round1":"h","round2":"i","round20":"z"},

second_data:{"round1":"a","round2":"b","round26":"z"}

}

var first = myarray.first_data

var totalKeys = Object.keys(myarray.first_data).length;

var keys = Object.keys(myarray.first_data);

for(let i=0; i < totalKeys; i++){

  console.log("keys is", keys[i])

console.log("Value is", first[keys[i]])

}