I use two ngb-datepicker in a page, of course jalali calendar, and bind to these two model:
dateModelFrom: NgbDateStruct;
dateModelTo: NgbDateStruct;
after user select dates, i have 2 jalali date with ngb date structure:
dateModelFrom = {day: 1, month: 1, year: 1398}
dateModelTo = {day: 3, month: 1, year: 1398}
now, I need to calculate difference between two dates, and check if fromDate is less than toDate or not.
i can use (https://github.com/alihoseiny/ngx-persian) or (https://momentjs.com/) and convert these two date and then calculate, but this can not be good, I think must be shorter solution.
also i know there is NgbDateNativeAdapter service(https://ng-bootstrap.github.io/#/components/datepicker/api#NgbDateNativeAdapter), i try to convert to javascript Date, and then calculate, but output is same as input:
let toDay:NgbDateStruct = this._persianNgbCalendar.getToday();;
let _toDay:Date = this._ngbDateNativeAdapter.toModel(toDay);
In the documenation from ngb-datepicker you will find an example for a range picker and there is a implementation for comparing two dates. Also you can check the stackblitz for better understanding.
Example:
<ngb-datepicker #dp (select)="onDateSelection($event)" [displayMonths]="2" [dayTemplate]="t" outsideDays="hidden"></ngb-datepicker>
In your onDateSelection function you can compare two dates:
onDateSelection(date: NgbDate) {
if (!this.fromDate && !this.toDate) {
this.fromDate = date;
} else if (this.fromDate && !this.toDate && date.after(this.fromDate)) {
this.toDate = date;
} else {
this.toDate = null;
this.fromDate = date;
}
}
Related
Okay so I have a table like shown...
I want to use PowerBI to create a new column called 'First_Interaction' where it will say 'True' if this was the user's earliest entry for that day. Any entry that came in after the first entry will be set to "False".
This is what I want the column to be like...
Use the following DAX formula to create a column:
First_Interaction =
VAR __userName = 'Table'[UserName]
VAR __minDate = CALCULATE( MIN( 'Table'[Datetime] ), FILTER( 'Table', 'Table'[UserName] = __userName ) )
Return IF( 'Table'[Datetime] = __minDate, "TRUE", "FALSE" )
Power BI dosnt support less than second so your DateTime Column must be a Text value. Take that on consideration for future transformation.
I'm receiving timestamps in the following format '2016-08-17T14:00:00-04:00', which I can parse in moment with moment('2016-08-17T14:00:00-04:00', 'YYYY-MM-DDTHH:mm:ssZ').
But the problem is that I want to print out .format('LLLL') and have it read Wednesday, August 17, 2016 10:00 AM, i.e. subtracting -04:00 from 14:00:00 (NY from UTC). It appears that there is a _tzm: -240 property in the moment object that looks like it holds that -4 hours value, but how do I use that property?
The other goal is to be able to pass in the current time and test if it is between the startDate and endDate variables below. I am guessing if I can convert both to NY-EST I can do this, but I can't seem to get moment to accept the timezone parameter.
Any thoughts?
var moment = require('moment');
// Timestamp strings from API
var startDate = '2016-08-17T14:00:00-04:00';
var endDate = '2016-08-17T15:00:00-04:00';
// Create a range from the start and end dates
var range = moment().range(new Date(startDate), new Date(endDate));
// Get the current time
var currentTime = new Date();
// Does the current time fall within the range b/w the start and end dates
range.contains(currentTime);
A solution I found is below. Adding the value from momentObj._tzm to the parsed date.
module.exports.convertDateToProperTimezone = function (dt) {
var _m = moment(dt, 'YYYY-MM-DDTHH:mm:ssZ');
return _m.add(_m._tzm, 'minutes');
};
I am having a problem with flex.
How can I get the number of Days in a particular month in Flex?
Thanks
Use the Date object , setting the day to 0, getDate will return the last day in the month which is also the day count; you have also to give the year you want to check, because you know february can have 29 days.
function getDayCount(year:int, month:int):int{
var d:Date=new Date(year, month, 0);
return d.getDate();
}
trace(getDayCount(2012,2));
The example above doesn't work for January!
new Date(2011,0,0) returns 12/31/2010
new Date(2011, 1, 0) returns 01/31/2011
new Date(2011, 1, 1) returns 02/01/2011
Create a new date object by specifying the year, desired month + 1, and a day of 0. This will create a date object for the last day of the desired month. Then call getDate() on the object to return the last day.
Note that months are zero based in Flex, so Jan = 0, Feb = 1, and so on. Therefore, if you want to know what the last day in Feb was for 2012 you would do the following:
var FEB:int = 1;
var date:Date = new Date(2012, FEB + 1, 0);
var lastDayInFeb:Number = date.getDate();
Here is a more complete example with a couple of non-unit tests and a reusable static method for returning the last day of a month.
how to compare values of 2 dates using actionscript
i executed this code in my program..
var time1:Date = new Date(Number(fromDate.substr(0,4)),Number(fromDate.substring(5,7))-1, Number(fromDate.substring(8,10)));
var time2:Date = new Date(Number(toDate.substr(0,4)),Number(toDate.substring(5,7))-1, Number(toDate.substring(8,10)));
if(time1.getTime() > time2.getTime())
{
Alert.show(time1 + ” is after ” + time2);
}
im getting error: Error: Unexpected end of token stream
AS3 doesn't support a time delta class like Python so this can actually be a little tricky. There are lots of things to be worried about when comparing dates:
daylight savings time (when the clocks change one hour in certain countries Spring and Fall)
time-zones
leap-years
The roughest way to do things is just to use the time property of a date object. This way you can get an accurate difference between two dates expressed in milliseconds:
var date1:Date = new Date(2001, 9, 12); // Oct. 12, 2001
var date2:Date = new Date(2010, 5, 22); // Jun. 22, 2010
var differenceInMilliseconds:Number = date2.time - date1.time;
Using this time property you can do things like check if one date is before or after another date. You can also do rough calculations on the distance between two dates by defining some constants:
const MILLISECOND_PER_SECOND:int = 1000;
const SECOND_PER_MINUTES:int = 60;
const MINUTES_PER_HOUR:int = 60;
const HOURS_PER_DAY:int = 24;
// ... etc ...
var differenceInSeconds:Number = differenceInMilliseconds / MILLISECOND_PER_SECOND;
var differenceInMinutes:Number = differenceInSeconds / SECOND_PER_MINUTES;
var differenceInHouse:Number = differenceInMinutes / MINUTES_PER_HOUR;
var differenceInDays:Number = differenceInHouse / HOURS_PER_DAY;
Once you get to the level of days you could get problems with daylight savings time since the change of 1 hour can make it seem like a full day has passed when it really hasn't. After days and into weeks or months you run into leap year problems.
Assuming your string processing code correctly gives you valid date objects, just use the ObjectUtil.dateCompare function to compare 2 dates:
http://livedocs.adobe.com/flex/3/langref/mx/utils/ObjectUtil.html#dateCompare%28%29
if( ObjectUtil.dateCompare(date1, date2) == 1 ){}
I'm pretty sure that the return types defined in the ASDocs are wrong.
It'll actually return -1 if a is null or before b; 1 if b is null or before.
If you have two dates as Date objects already, just compare them. e.g. a.getTime() > b.getTime().
If they are strings, see their format is acceptable by the default Date.parse() function. If not, you may have other work to do.
Let's see your values first, shall we?
private function differenceBetweenDates(date1:Date, date2:Date):Number{
var MS_PER_DAY:uint = 1000 * 60 * 60 * 24;
var tempDate:Date = new Date(date2.time - date1.time);
var difference:Number =
Math.abs(Math.round((tempDate.time / MS_PER_DAY)));
return difference;
}
I have achieved comparing dates succesfully using below code:
//here i have to compare two dates ,these are startdate and enddate.
// gets millisecs counts from 1970 midnight till sellected start date
var Starttimecounts : Number = popJobWin.DFStartDate.selectedDate.time;
// gets millisecs counts from 1970 midnight till sellected end date
var Endtimecounts : Number = popJobWin.DFEndDate.selectedDate.time ;
if (Starttimecounts > Endtimecounts)
{
Alert.show('end date should not lesser than start date..wrong!');
//replace your logic here
}
else
{
Alert.show('correct!');
//replace your logic here
}
I need to retrieve the current date in asp.net and then compare that with the date given by the user in textbox1.text(mm/dd/yyyy format), if date date given is greater than current date then error else add 4months2days with that date and display it in textbox2.text.
help me please,
thanking you guys,
Indranil
DateTime dateToCompare;
if(DateTime.TryParse(textbox1.text, out dateToCompare))
{
DateTime current = DateTime.Now;
TimeSpan ts = current - dateToCompare;
if (ts.Ticks < 0)
{
//display error
}
else
textbox2.text = dateToCompare.AddMonths(4).AddDays(2).ToString("mm/dd/yyyy");
}
}
I'm not going to write your code, but in .NET you can use ToString to specify a date format, TryParse to get a date out of a string. And AddDays, AddMonths etc to manipulate a date.
In javascript, there's no simple way to format output, but you can use getMonth etc to prompt the individual values and concatenate a string from that. You can use a combination of getDate and setDate to manipulate dates. It automatically corrects for new months, i.e. if you run myDate.setDate( myDate.getDate() + 60 ) it'll actually increment by 60 days; you won't end up with a weird date like May 74th.
Keep in mind that months in javascript are zero-based, ie January is 0, February is 1, etc.
You can create a new date in javascript by new Date(yy, mm, dd) or new Date('yy/mm/dd'), so you could string-manipulate an input and create a date from that.
To compare two dates, you can subtract one from the other, and get the difference in milliseconds.
if ( dateA - dateB < 0 ) // dateB is greater than dateA (occurrs later)
and
var diff = Math.abs(dateA - dateB) // difference in ms, no matter which date is greater
DateTime date1 = new DateTime();
if(DateTime.TryParse(textbox1.text, out date1)){
if (date1.CompareTo(DateTime.Now) > 0)
{
//Error code here
}else
{
textbox2.text = date1.AddMonths(4).AddDays(2);
}
}