Ben Nadel
On User Experience (UX) Design, JavaScript, ColdFusion, Node.js, Life, and Love.
I am the chief technical officer at InVision App, Inc - a prototyping and collaboration platform for designers, built by designers. I also rock out in JavaScript and ColdFusion 24x7.
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Ben Nadel at the New York ColdFusion User Group (Feb. 2008) with:

ColdFusion UDF For Retrieving Surrounding Dates

By Ben Nadel on
Tags: ColdFusion

Earlier today, Sam suggested that I wrap at least some of my surrounding date algorithms in a ColdFusion user defined function. Here is my UDF, GetSurroundingDates(), that wraps all those dates up in a struct and returns it:

  • <cffunction
  • name="GetSurroundingDates"
  • access="public"
  • returntype="struct"
  • output="false"
  • hint="Returns the start and end dates of all same-year dates relavent to the given date.">
  •  
  • <!--- Define arguments. --->
  • <cfargument
  • name="Date"
  • type="date"
  • required="true"
  • />
  •  
  •  
  • <!--- Set up local scope. --->
  • <cfset var LOCAL = StructNew() />
  •  
  • <!---
  • Start out fixing the passed in date. Fixing it will
  • remove the time and result in a date-only values. This
  • value will be echoed back in the resultant struct.
  • --->
  • <cfset LOCAL.Date = DateFormat( ARGUMENTS.Date ) />
  •  
  • <!--- Get the start and end date of the week. --->
  • <cfset LOCAL.WeekStart = DateFormat( LOCAL.Date - DayOfWeek( ARGUMENTS.Date ) + 1 ) />
  • <cfset LOCAL.WeekEnd = DateFormat( LOCAL.WeekStart + 6 ) />
  •  
  • <!--- Get the start and end of the month. --->
  • <cfset LOCAL.MonthStart = DateFormat( LOCAL.Date - Day( LOCAL.Date ) + 1 ) />
  • <cfset LOCAL.MonthEnd = DateFormat( LOCAL.Date + (DaysInMonth( LOCAL.Date ) - Day( LOCAL.Date )) ) />
  •  
  • <!--- Get the start and end of the calendar month. --->
  • <cfset LOCAL.CalendarMonthStart = DateFormat( LOCAL.MonthStart - DayOfWeek( LOCAL.MonthStart ) + 1 ) />
  • <cfset LOCAL.CalendarMonthEnd = DateFormat( LOCAL.MonthEnd + (7 - DayOfWeek( LOCAL.MonthEnd )) ) />
  •  
  • <!--- Get the start and end of the year. --->
  • <cfset LOCAL.YearStart = DateFormat( CreateDate( Year( LOCAL.Date ), 1, 1 ) ) />
  • <cfset LOCAL.YearEnd = DateFormat( CreateDate( Year( LOCAL.Date ), 12, 31 ) ) />
  •  
  •  
  • <!--- Return the surrounding dates. --->
  • <cfreturn LOCAL />
  • </cffunction>

Calling it:

  • <!---
  • Get today as the given date. We don't care about
  • fixing the date as the ColdFusion UDF will take
  • care of that for us.
  • --->
  • <cfset dtToday = Now() />
  •  
  • <!--- Dump out resultant struct. --->
  • <cfdump
  • var="#GetSurroundingDates( dtToday )#"
  • label="Surronding Dates - #DateFormat( dtToday )#"
  • />

... we get the following output:


 
 
 

 
Get Surrounding Dates In ColdFusion  
 
 
 

I put the DateFormat() calls inside of the GetSurroundingDates() ColdFusion UDF for ease of use, but honestly, these are just overkill to me. I enjoy working with numeric dates so I don't care that dates coming out of it would be numeric (would fail IsDate() method calls). Once you get comfortable with numeric dates, I would recommend stripping out those DateFormat() calls as they do nothing significant but add to processing overhead.



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Reader Comments

good on yer, Ben,

the next step is submitting the UDF to cflib.org so it'll spread around the world for evermore (well, that's perhaps going a bit far but you get the idea...)

just a thought

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