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HT-7/date_calculator.js

Last active June 29, 2022 23:10
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  1. HT-7 revised this gist Jun 29, 2022. 1 changed file with 26 additions and 4 deletions.
    30 date_calculator.js
    View file
    @@ -1,5 +1,11 @@
    var calcDate_data = {}; // initializing data object

    function calcDate(date1, date2){

    // memorize input to detect invalid input
    calcDate_data.input1 = date1;
    calcDate_data.input2 = date2;

    // initiate date object
    var dt_date1 = new Date(date1);
    var dt_date2 = new Date(date2);
    @@ -41,10 +47,26 @@ if (months_passed > 1 ) result+=months_passed+' ' + months_plural[1]+' ';
    if (days_passed == 1) result+=days_passed+' ' + days_plural[0];
    if (days_passed > 1 ) result+=days_passed+' ' + days_plural[1];

    // return the result
    return {
    // put last result into object so it can be alerted to the user
    calcDate_data.last_result = {
    "total_days" : Math.round(total_days),
    "result" : result
    "text" : result
    };

    }
    // message returned when an invalid date was input
    if (! calcDate_data.last_result.text || calcDate_data.input1==null || calcDate_data.input2==null) {
    calcDate_data.last_result.text = "At least one input date is invalid.";
    }

    // return the result
    return calcDate_data.last_result;

    }

    // example use
    calcDate(
    // prompt user to enter two dates
    prompt("Date calculator \n Enter start date"),
    prompt("Date calculator \n Enter end date")
    );
    alert(calcDate_data.last_result.text); // alert result text
  2. HT-7 created this gist Jun 23, 2022.
    50 date_calculator.js
    View file
    @@ -0,0 +1,50 @@
    function calcDate(date1, date2){

    // initiate date object
    var dt_date1 = new Date(date1);
    var dt_date2 = new Date(date2);
    // get the time stamp
    date1 = dt_date1.getTime();
    date2 = dt_date2.getTime();

    var calc;
    // check which time stamp is greater
    if (date1 > date2){
    calc = new Date(date1 - date2) ;
    } else {
    calc = new Date(date2 - date1) ;
    }

    // retrieve the date, month and year
    var calc_format_tmp = calc.getDate() + '-' + (calc.getMonth()+1)+ '-'+calc.getFullYear();
    // convert to an array and store
    var calc_format = calc_format_tmp.split("-");
    // subtract each member of our array from the default date
    var days_passed = parseInt(Math.abs(calc_format[0]) - 1);
    var months_passed = parseInt(Math.abs(calc_format[1]) - 1);
    var years_passed = parseInt(Math.abs(calc_format[2] - 1970));

    // set up custom text
    var years_plural = ["year", "years"];
    var months_plural = ["month", "months"];
    var days_plural = ["day", "days"];

    // convert to days and sum together
    var total_days = (years_passed * 365) + (months_passed * 30.417) + days_passed;

    // display result with custom text
    var result = ""; // declare string
    if (years_passed == 1) result+=years_passed+' ' + years_plural[0]+' ';
    if (years_passed > 1 ) result+=years_passed+' ' + years_plural[1]+' ';
    if (months_passed == 1) result+=months_passed+' ' + months_plural[0]+' ';
    if (months_passed > 1 ) result+=months_passed+' ' + months_plural[1]+' ';
    if (days_passed == 1) result+=days_passed+' ' + days_plural[0];
    if (days_passed > 1 ) result+=days_passed+' ' + days_plural[1];

    // return the result
    return {
    "total_days" : Math.round(total_days),
    "result" : result
    };

    }