Compare two dates with specific date

Question

this was mine third school assignment

Write a JavaScript function that compares two dates. Call this function compare_date () and give this function two input parameters. Take off the code below and make sure the window.alert () returns a message or date one is greater or less than 2 date or perhaps date 1 equals 2 date

i got something like this

var d1 = new Date(2017, 0, 2); // 2 januari 2017 
var d2 = new Date(2017, 0, 1); // 1 januari 2017

window.alert(compare_date(d1,d2));


function compare_date(date1,date2){  


}

Asking assignment question is not wrong but try something first; empty function really ? — Vinod Louis, Dec 09 '16 at 09:23
@Dimitri Check this http://stackoverflow.com/questions/492994/compare-two-dates-with-javascript — codtex, Dec 09 '16 at 09:24
my question i have no idea how to do this... can someone help me — Dimitri, Dec 09 '16 at 09:25
note: `/* anything involving '=' should use the '+' prefix it will then compare the dates' millisecond values*/ +x <= +y;` — Kevin Kloet, Dec 09 '16 at 09:28

Vishal Suthar · Accepted Answer · 2016-12-09T09:35:40.923

1

Here you go:

var d1 = new Date(2017, 0, 2); // 2 januari 2017 
var d2 = new Date(2017, 0, 1); // 1 januari 2017

compare_date(d1,d2);
    
function compare_date(date1,date2){  
   if (date1 > date2) {
        alert("Date One is greather than Date Two.");
   }else if (date2 > date1) {
        alert("Date Two is greather than Date One.");
   }else{
       alert("Both are equal.");
   }
}

JSFiddle Demo

edited Dec 09 '16 at 09:35

answered Dec 09 '16 at 09:29

Vishal Suthar

17,013
3
59
105

Thans this was very helpful – Dimitri Dec 09 '16 at 09:45

Aruna · Answer 2 · 2016-12-09T09:33:02.290

You can try the below one which is just a simple one like date1 > date2.

Note: date1 > date2 and date1.getTime() > date2.getTime() are same.

var d1 = new Date(2017, 0, 2); // 2 januari 2017 
var d2 = new Date(2017, 0, 1); // 1 januari 2017

window.alert(compare_date(d1,d2));


function compare_date(date1, date2){  
 return (date1.getTime() === date2.getTime() ? 'Equal' : (date1 > date2 ? 'date1 is greater than date 2' : 'date1 is less than date2'));

}

score 0 · Answer 3 · answered Dec 09 '16 at 09:26

something like this?

var d1 = new Date(2017, 0, 2); // 2 januari 2017 
var d2 = new Date(2017, 0, 1); // 1 januari 2017

window.alert(compare_date(d1,d2));


function compare_date(date1,date2){  
  var diff = date1 - date2;
 if (diff < 0)
   return "date 2 is bigger";
  else
  if (diff > 0)
   return "date 1 is bigger";
  else
  return "are the same"

}

techws · Answer 4 · 2016-12-09T10:12:26.237

0

EDIT : Math.sign() is Ecmascript 2015

make a reusable function:

return 0 if dates are equal

return -1 if d1 is before d2

return 1 if d1 is after d2

var d1 = new Date(2017, 0, 2); // 2 januari 2017
var d2 = new Date(2017, 0, 1); // 1 januari 2017

window.alert(compare_date(d1,d2));


function compare_date(date1, date2){  
    return Math.sign(date1.getTime() - date2.getTime());
}

edited Dec 09 '16 at 10:12

answered Dec 09 '16 at 10:04

techws

108
8

Compare two dates with specific date

4 Answers4