Question

101

Checking if date belongs to array of dates

rated 0 times [ 107] [ 6] / answers: 1 / hits: 32563 / 11 Years ago, wed, june 12, 2013, 12:00:00

I'm trying to check if a date from a jQuery UI datepicker belongs to an array of dates that are holidays. Can't figure out what I'm doing wrong :(

var holidayArray2013 = [new Date('October 3, 2013 00:00:00 GMT+0200'), new Date('December 25, 2013 00:00:00 GMT+0100'), new Date('December 26, 2013 00:00:00 GMT+0100')];

var DateOfOrder = $('#datepicker').datepicker('getDate');

if ($.inArray(DateOfOrder, holidayArray2013) > -1) {

  console.log(is holiday);

}

edit: console.log(DateOfOrder); returns Thu Oct 03 2013 00:00:00 GMT+0200 just like holidayArray2013[0] but $.inArray(DateOfOrder, holidayArray2013) still returns -1

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answered 11 Years ago kristineterrak · Accepted Answer

You're getting a false negative because comparing 2 date objects compares their references and not their values as you perhaps expected.

There are a few options, you could store the result of Date.getTime() in your array which is just a numerical representation of the date:

var holidayArray2013 = [

        new Date('October 3, 2013 00:00:00 GMT+0200').getTime(), 

        new Date('December 25, 2013 00:00:00 GMT+0100').getTime(), 

        new Date('December 26, 2013 00:00:00 GMT+0100').getTime()];

And then compare that:

var DateOfOrder = n$('#datepicker').datepicker('getDate').getTime();

if ($.inArray(DateOfOrder, holidayArray2013) > -1) ...

This works fine, as demonstrated here: http://jsfiddle.net/rRJer/

If, however you are constrained to not changing the holiday array you could loop to try to locate the right date value:

var isHoliday = false;

for(var i=0;i<holidayArray2013.length;i++){

    if(holidayArray2013[i].getTime() == DateOfOrder.getTime()){

        isHoliday = true;

        break;

    }

}

Demo is here: http://jsfiddle.net/3R6GD/