Transferring data between arrays in TypeScript depending on a specified condition

Question

Transferring data between arrays in TypeScript depending on a specified condition

I am looking to transfer all data from one array to another in TypeScript based on a certain condition.

array: any =
            [
                {
                    Hostname: 'CBA',
                    Certificate_Expiry_Date: 'Thu Mar 25 16:32:48 GMT 2021',
                    '': ''
                },
                {
                    Hostname: 'CBCB',
                    Certificate_Expiry_Date: 'Wed Apr 07 11:19:01 IST 2021',
                    '': ''
                },
                {
                    Hostname: 'cbcb',
                    Certificate_Expiry_Date: 'Thu Apr 01 12:05:22 IST 2021',
                    '': ''
                },
                {
                    Hostname: 'cbm',
                    Certificate_Expiry_Date: 'Sat Apr 04 10:45:19 IST 2020',

            ];

        
        alert() {
            if (this.array.Certificate_Expiry_Date > Date) {
                this.array.forEach(item => {
                    this.alertsArray.push(
                        item.Hostname,
                        item.Certificate_Expiry_Date
                    );
                  });
               }
            console.log(this.alertsArray);
          }

I need help modifying the above code to add an object to the alerts array when the certificate expiration date is less than two months away, as my current implementation does not seem to be working as expected. Any assistance would be greatly appreciated.

javascript angular typescript

Answer 1

Answer №1

Looks like you're attempting to access an undefined value in the array using dot notation, which is not supported for arrays

  alert() {
    if (this.array.Certificate_Expiry_Date > Date) { <--- dot notation on the array wont work
      this.array.forEach(item => {
        this.alertsArray.push(
           item.Hostname,
           item.Certificate_Expiry_Date
        );
      });
    }
    console.log(this.alertsArray);
  }

Try iterating through the array and checking if your dates are less than 60 days apart. If they are, push that item into your alerts array

To check your condition, convert the expiration date and today's date to new Date() objects, then calculate the difference in milliseconds and divide by the number of milliseconds in a day. Check if this is less than 60 days.

You might need to adjust the calculations here to make it work

 alert() {
    const milsInDay = (1000*60*60*24);
    const today = new Date().getTime() / milsInDay;
    this.array.forEach((item) => {
       const exp = new Date(item.Certificate_Expiry_Date).getTime() / milsInDay;
       if(exp - today < 60) {
          this.alertsArray.push(item);
       }
    });
    console.log(this.alertsArray);
 }

Answer 2

Looks like you're attempting to access an undefined value in the array using dot notation, which is not supported for arrays

  alert() {
    if (this.array.Certificate_Expiry_Date > Date) { <--- dot notation on the array wont work
      this.array.forEach(item => {
        this.alertsArray.push(
           item.Hostname,
           item.Certificate_Expiry_Date
        );
      });
    }
    console.log(this.alertsArray);
  }

Try iterating through the array and checking if your dates are less than 60 days apart. If they are, push that item into your alerts array

To check your condition, convert the expiration date and today's date to new Date() objects, then calculate the difference in milliseconds and divide by the number of milliseconds in a day. Check if this is less than 60 days.

You might need to adjust the calculations here to make it work

 alert() {
    const milsInDay = (1000*60*60*24);
    const today = new Date().getTime() / milsInDay;
    this.array.forEach((item) => {
       const exp = new Date(item.Certificate_Expiry_Date).getTime() / milsInDay;
       if(exp - today < 60) {
          this.alertsArray.push(item);
       }
    });
    console.log(this.alertsArray);
 }

Answer 3

Answer №2

To form a fresh array containing only elements that meet a particular condition, employ the filter() method and expand (...) to add those elements into your designated target array:

this.targetArray.push(...this.mainArray.filter(item => item.Expiry_Date > Current_Date));

Answer 4

To form a fresh array containing only elements that meet a particular condition, employ the filter() method and expand (...) to add those elements into your designated target array:

this.targetArray.push(...this.mainArray.filter(item => item.Expiry_Date > Current_Date));

Transferring data between arrays in TypeScript depending on a specified condition

Answer №1

Answer №2

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