这是我的代码：

https://github.com/DavidNyan10/NewProject

const fs = require('fs');
const csv = require('csv-parser')

const myString = new Promise((resolve, reject) => {
    resolve('John');
});

class myClass{
    constructor(filename){
        this.myArray = [];
        this.myArray.push(new Promise((res) => {
            fs.createReadStream('filename')
                  .pipe(csv(['FirstName', 'LastName', 'Address', 'Town', 'Country', 'Postcode']))
                  .on('data', (data) => {
                    return(data);
                  })
          }))
    }
    async myFunction() {
        for(let i = 0; i < this.myArray.length; i++) {
            if (myString.includes(this.myArray[i]['phrase'])){
                if (this.cooled_down(i)){
                    this.approve(i, myString);
                }
            }
        }
    }
    
    cooled_down(i){
        dictionary = this.myArray[i]
        if (!dictionary.keys().includes('approved')){
            // Means we have never approved on this person!
            return True;
        } else{
            now = datetime.now();
            duration = now - datetime.fromtimestamp(dictionary['approved']);
            duration_seconds = duration.total_seconds();
            hours = divmod(duration_seconds, 3600)[0];
            if (hours >= 24){
                return True;
            } else{
                console.log("Couldn't approve " + dictionary['FirstName'] + "Cool Down time: " + 24 - hours);
            }
        }
        return False;
    }

    approve(i, myString){
        dictionary = this.myArray[i];
        try{
            setTimeout(function(){
                console.log(myString);
                console.log(dictionary['FirstName'])
                console.log(dictionary['Postcode'])
            }, 60 * 60 * 3);
        }catch(e){
            console.log(e);
        }

        now = datetime.now();
        this.myArray[i]['approved'] = now.timestamp();
    }
}

myObj = new myClass("myCSV.csv");
myString.then(myObj.myFunction);

它一直说

(node:3196) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'myArray' of undefined
    at myFunction (D:\projects\newproject\index.js:20:30)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:3196) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2)
(node:3196) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

但正如您所清楚看到的， this.myArray 在第 10 行定义得很好。

发生了什么？

我对 javascript 类和对象还很陌生，所以如果我看起来很笨，我很抱歉。

此外，有什么想法可以让第 11-17 行更好吗？我只是将 csv 放入数组中，但我不知道这是否是最好的方法。