Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
?
Solved

DateTime question

Posted on 2014-09-22
5
Medium Priority
?
155 Views
Last Modified: 2014-09-25
I am trying to create a condition for scheduling interface. But there is also a rule behinf it .

Once a session is scheduled, students may change or cancel up to five (5) calendar days before the scheduled session. The five days are worked out to the minute the session starts. Once the student is inside the five (5) calendar day window (up to the minute) prior to a scheduled time, the session cannot be rescheduled or cancelled. Please be sure that the selected sessions are sessions that will be attended by the student

How would I implement that
0
Comment
Question by:erikTsomik
  • 3
  • 2
5 Comments
 
LVL 53

Accepted Solution

by:
_agx_ earned 2000 total points
ID: 40337481
Take the scheduled date and time and subtract 5 days to get the cutoff date. Then compare the current date and time now to the cutoff date, down to the minutes. If it's later (ie they're within the 5 day window) don't allow any changes.

<cfset cutoffDateTime = dateAdd("d", -5, theScheduledDateTime)>
<cfif dateCompare(now(), cutoffDateTime , "n") gte 0>
	inside five day window. no changes allowed
<cfelse>
	changes allowed. before five day window. 
</cfif>

Open in new window

0
 
LVL 19

Author Closing Comment

by:erikTsomik
ID: 40337572
is DateCompare is a good command to use. is DateDiff is better?
0
 
LVL 53

Expert Comment

by:_agx_
ID: 40337615
They do different things, so .. it all depends on the task. In this case, DateCompare is better IMO. You don't care about the number of minutes difference ... just whether or not the current date and time is before the cutoff date.
0
 
LVL 19

Author Comment

by:erikTsomik
ID: 40337646
well in my case I do care about the time portion
0
 
LVL 53

Expert Comment

by:_agx_
ID: 40337685
Right. What I meant was, while you could do the same thing with DateDiff, it it's more complicated than necessary. Since you do care about the time portion, you'd have to calculate the number of minutes (or seconds) difference between the two dates:

            minutesDiff = dateDiff( date1, date2, "n");

Then use a formula to figure out how many minutes are in 5 days

      ie minutesIn5Days = 60 min per hour * 24 hours per day * 5 days.  

Then determine if #minutesDiff# is less than #minutesIn5Days#

Why do all that conversion logic, when you do not really care exactly how many minutes are in 5 days... You just want to know if the current date falls within the window or not.  The conversion stuff just makes the code more complicated IMO.  

Since the business rule is within 5 days, using dateAdd("d[ays]", -5, ..)" is easier to follow than a bunch of code converting time units. This does the same thing, more intuitively IMO:

     <cfset cutoffDateTime = dateAdd("d", -5, theScheduledDateTime)>
     <cfif dateCompare(now(), cutoffDateTime , "n") gte 0>
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction Knockoutjs (Knockout) is a JavaScript framework (Model View ViewModel or MVVM framework).   The main ideology behind Knockout is to control from JavaScript how a page looks whilst creating an engaging user experience in the least …
I found this questions asking how to do this in many different forums, so I will describe here how to implement a solution using PHP and AJAX. The logical flow for the problem should be: Write an event handler for the first drop down box to get …
Viewers will learn about basic arrays, how to declare them, and how to use them. Introduction and definition: Declare an array and cover the syntax of declaring them: Initialize every index in the created array: Example/Features of a basic arr…
The viewer will learn the benefit of using external CSS files and the relationship between class and ID selectors. Create your external css file by saving it as style.css then set up your style tags: (CODE) Reference the nav tag and set your prop…
Suggested Courses

577 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question