如何让async/await等待我的嵌套数组填充

Question

我遇到了一个问题,我可以看到数组和"arrayOfResults"的数据,但是当我尝试访问数组的某个部分时,它表示未定义.我知道它与异步调用有关,因为如果我把console.log置于超时,它会正确显示.我对异步调用很新,更别说等了.谢谢您的帮助!

async function convertToCSV() {
        var userInput = document.getElementById("policyList").value; //value from text area
        var arrayOfUserInput = userInput.split('\n').map(str => str.replace(/\s/g, '')); //converts userInput to array and removes whitespace
        var arrayOfResults = new Array();

        //iterates for how many user inputs are recorded into arrayOfUserInput
        for(i = 0; i < arrayOfUserInput.length; i++){
       //awaits for each result of retrieve data before inputing into arrayofresults
         arrayOfResults[i] = await retrieveData(arrayOfUserInput[i]);

        }
        //*****THIS IS THE PART NOT WORKING CORRECTLY****
       console.log(arrayOfResults[0][0]);
     }

     async function retrieveData (clientRecord){
        //pulling data from API
        var request = require("request");
        var resultsArr = new Array();
        var options = { method: 'POST',
        url: 'blah',
        body: '{\n\t"api_key": "********",\n\t"policy_number": "' +clientRecord+ '"\n}' };

        request(options, function (error, response, body) {

        var resData = JSON.parse(body);   //stores json response into object

        // Do Work here
        return  resultsArr;

     }

当我在console.log arrayOfResults [0]时,我正确地接收了所有数据.

当我像上面的console.log arrayOfResults [0] [0]一样,我得到了未定义,除非我设置超时以实际等待结果.

Answer 1

    return new Promise(function(resolve, reject) {
        request(options, function (error, response, body) {

        var resData = JSON.parse(body);   //stores json response into object

           if(resData.data.policy_number !== undefined){
             //...........
           } else{
               resultsArr[0] =resData.messages[0];
           }
           resolve(resultsArr);
        });
    });

我整理了兰迪为您提供的建议，以便您获得更好的想法，