What is the best way to compare two date strings with the format dd/mm/yyyy using JavaScript?

Question

What is the best way to compare two date strings with the format dd/mm/yyyy using JavaScript?

When attempting to compare a "Date" type of data with an "Any" type of data, the comparison is not functioning as expected.

The date is retrieved in the following code:

var today = new Date();
var dd = String(today.getDate()).padStart(2, '0');
var mm = String(today.getMonth() + 1).padStart(2, '0');
var yyyy = (today.getFullYear());
today = dd + '/' + mm + '/' + yyyy;

The actual comparison is being performed here:

for (const event of events) {
        if (event.fecha_fin >= today  && event.hora_fin > my_time) {
          console.log(event.fecha_fin > today)
          eventsWithLowestPrice.push(event.id_evento_fk)
          console.log(event.id_evento_fk)
        }
      }

The data type of event.fecha_fin is currently set to "Any".

I have attempted changing both fecha_fin and today into "Number" data types without success. I am unsure of how to proceed.

In trying to adjust the data types of "today" and "fecha_fin" to "Number", I have encountered challenges and require further guidance.

javascript typescript

Answer 1

Answer №1

Transform the strings into dates using

function convertStringToDate(str) {
  const [dd, mm, yyyy] = str.split('/');
  return new Date(yyyy, mm - 1, dd);
}

and then compare the dates:

for (const event of events) {
  const date1 = convertStringToDate(event.end_date);
  const date2 = convertStringToDate(today);
  if (date1 >= date2 && event.final_hour > my_time) {
    console.log(date1 > date2)
    eventsWithLowestPrice.push(event.event_id)
    console.log(event.event_id)
  }
}

For instance:

function convertStringToDate(str) {
  const [dd, mm, yyyy] = str.split('/');
  return new Date(yyyy, mm - 1, dd);
}

const events = [{end_date: '01/01/2020', final_hour: 2}];
const today = '02/02/2002';
const my_time = 1;

for (const event of events) {
  const date1 = convertStringToDate(event.end_date);
  const date2 = convertStringToDate(today);
  if (date1 >= date2 && event.final_hour > my_time) {
    console.log(date1 > date2)
    //eventsWithLowestPrice.push(event.event_id)
    console.log(event.event_id)
  }
}

Answer 2

Transform the strings into dates using

function convertStringToDate(str) {
  const [dd, mm, yyyy] = str.split('/');
  return new Date(yyyy, mm - 1, dd);
}

and then compare the dates:

for (const event of events) {
  const date1 = convertStringToDate(event.end_date);
  const date2 = convertStringToDate(today);
  if (date1 >= date2 && event.final_hour > my_time) {
    console.log(date1 > date2)
    eventsWithLowestPrice.push(event.event_id)
    console.log(event.event_id)
  }
}

For instance:

function convertStringToDate(str) {
  const [dd, mm, yyyy] = str.split('/');
  return new Date(yyyy, mm - 1, dd);
}

const events = [{end_date: '01/01/2020', final_hour: 2}];
const today = '02/02/2002';
const my_time = 1;

for (const event of events) {
  const date1 = convertStringToDate(event.end_date);
  const date2 = convertStringToDate(today);
  if (date1 >= date2 && event.final_hour > my_time) {
    console.log(date1 > date2)
    //eventsWithLowestPrice.push(event.event_id)
    console.log(event.event_id)
  }
}

What is the best way to compare two date strings with the format dd/mm/yyyy using JavaScript?

Answer №1

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