I defined a nested loop in angular2 to display a form. Now I want to process the data entered by the user. The code is as follows

this.data = value;
for (var i=0;i<this.questionlist.length;i++){
    this.questionId[i]=this.questionlist[i].id;
    this.tempdata = this.questionlist[i].ans;
    for(var j=0;j<this.tempdata.length;j++){
        console.log(this.data[this.questionId[i]].(this.tempdata[j]))
    }
}

The names of each array and the arrays nested inside are the methods of obtaining the data before. Generally speaking, they are not fixed. Now I want to read out each value, so the question is, what should I do? How can I read the nested value where the last this.tempdata[j] is the name?
I’ve been thinking about it for a long time and checking it out for a long time, but I can’t find any solution_(:з　∠)_