DZone Snippets: year code

Increment a date using Ruby

jrobertson (James Robertson) — Wed, 05 Mar 2008 13:43:34 GMT

This Ruby code converts a string into a date and increments the day, week, month, quarter or year.



def date_add(sdate='', unit='',i=0)



  sdate[/(\d+)\/(\d+)\/(\d+)\s(\d+):(\d+):(\d+)/]

  iyear = $3.to_i; imonth = $2.to_i; iday = $1.to_i; ihour = $4.to_i; imin = $5.to_i; isec = $6.to_i

  

  case  unit

    when 'days'

      t1 = Time.local(iyear,imonth,iday,ihour,imin,isec)

      t1 += (60 * 60 * 24 * i)

    when 'weeks'

      t1 = Time.local(iyear,imonth,iday,ihour,imin,isec)

      t1 += (60 * 60 * 24 * 7 * i) 

    when 'months'

      imonth += i

      if imonth < 12 then

        t1 = Time.local(iyear,imonth+i,iday,ihour,imin,isec)

      else

        t1 = Time.local(iyear+=1,imonth -12,iday,ihour,imin,isec)

      end

    when 'quarter'

      imonth += 3

      if imonth <= 12 then

        t1 = Time.local(iyear,imonth,iday,ihour,imin,isec)

      else

        t1 = Time.local(iyear+=1,imonth - 12,iday,ihour,imin,isec)

      end    

    when 'years'

      t1 = Time.local(iyear+i,imonth,iday,ihour,imin,isec)

    else

      raise 'not a valid date unit'

  end

  t1

end



date_add("17/03/2008 17:48:00",'months',2)

output: Sat May 17 17:48:00 +0100 2008

Calculate last day of current Month

bmowbray (Brian Mowbray) — Wed, 27 Feb 2008 19:13:47 GMT

'Determines what the next month is based on today and subtracts 1 day from first day of next month.



'VB.NET

Dim NextMonth As Integer

Dim RptYear As Integer

'Determine next month

NextMonth = DatePart(DateInterval.Month, DateAdd(DateInterval.Month, +1, today))

'Determine the year of the next month, in case you are going from Dec to Jan

RptYear = DatePart(DateInterval.Year, DateAdd(DateInterval.Month, +1, today))

'Subtract 1 day from the first day of next month to get this months last day

Return DateAdd(DateInterval.Day, -1, DateValue(NextMonth.ToString & "/1/" & RptYear.ToString))

Formatting a date in XSLT

jrobertson (James Robertson) — Fri, 08 Feb 2008 00:00:30 GMT

This template formats a date ie 060208171320 -> 06-Feb-08T17:13:20

copied from http://snipr.com/1z833 [geekswithblogs.net] and modified to suit the date input format I used.

PHP Copyright Updater

GreyFox (Evan Walsh) — Fri, 09 Mar 2007 22:41:51 GMT

// PHP Copyright Updater
// by Evan Walsh
// NothingConcept.com

This code will automatically change the copyright on your site as the year changes. Tested and approved by me.

Just call this in one of your PHP files by including the file with this code in it:



//Licensed under the GPL v2

//by Evan Walsh of nothingconcept.com

function copyright($site,$year) {

    $current = date(Y);

    if($year == $current) { $eyear = $year; }

    else { $eyear = "$year - $current"; }

    echo "All content © $eyear $site";

}

?>

Example:

Then place or something similar in the place you want the copyright to display.

Simple as that.

Is Date //JavaScript Function

jonasraoni (Jonas Raoni Soares Silva) — Thu, 15 Jun 2006 20:12:01 GMT

Checks if a date is valid and returns error codes described bellow.

[UPDATED CODE AND HELP CAN BE FOUND HERE]



//+ Jonas Raoni Soares Silva

//@ http://jsfromhell.com/geral/is-date [v1.0]



isDate = function(y, m, d){ //v1.0

        if(typeof y == "string" && m instanceof RegExp && d){

            if(!m.test(y)) return 1;

            y = RegExp["$" + d.y], m = RegExp["$" + d.m], d = RegExp["$" + d.d];

        }

        d = Math.abs(d) || 0, m = Math.abs(m) || 0, y = Math.abs(y) || 0;

        return arguments.length != 3 ? 1 : d < 1 || d > 31 ? 2 : m < 1 || m > 12 ? 3 : /4|6|9|11/.test(m) && d == 31 ? 4

        : m == 2 && (d > ((y = !(y % 4) && (y % 1e2) || !(y % 4e2)) ? 29 : 28)) ? 5 + !!y : 0;

};

Usage

Help



isDate(y: Integer, m: Integer, d: Integer): Integer

    Checks a date and returns 0 if it's valid or one of the error codes bellow.

    y year

    m month

    d day



	

isDate(date: String, matcher: RegExp, map: Object): Integer

    Checks a date and returns 0 if it's valid or one of the error codes bellow.

    date date in a string form

    matcher regular expression responsible to find and store the day, month and year

    			

    map object containing the position where each date component is localized inside the regular expression. Its format is the following: {d: positionOfTheDay, m: positionOfTheMonth, y: positionOfTheYear}								

Return codes

    * 0 = Valid date

    * 1 = Date format invalid (regular expression failed or amount of arguments != 3)

    * 2 = Day isn't between 1 and 31

    * 3 = Month isn't between 1 and 12

    * 4 = On April, June, September and November there isn't the day 31

    * 5 = On February the month has only 28 days

    * 6 = Leap year, February has only 29 days

DateTime: Simple date operations in javascript

drefty (drefty) — Fri, 02 Dec 2005 07:17:12 GMT



/*

### begin_: file metadata

    ### 

    ### main:

    ###   - name : cfDateTime.js

    ###     desc : |

    ###         Simple date operations in jscript.

    ###         This file is for use with windows scripting host.

    ###     date : created="Thu 2005-12-01 11:57:38"

    ###     last : lastmod="Thu 2005-12-01 12:18:57"

    ###     lang : jscript

    ###     tags : jscript javascript date time now month hour year cfDateTime

    ### 

    */



/// begin_: declare and init variables

    var today       = new Date();

    var strYear     = today.getFullYear();

    var iMonth      = today.getMonth() + 1; // +1, we do NOT want zero-based month index

    var iQuarter    = Math.ceil((iMonth / 12) * 4);

    var iDay        = today.getDate();

    var strDateOut  = "";



/// begin_: leading zeropad single-digit numbers

    iMonth = (iMonth < 10)? "0" + iMonth : iMonth;

    iDay = (iDay < 10)? "0" + iDay : iDay;



/// begin_: display output

    strDateOut = strYear+"-"+ iMonth +"-"+iDay + " ";

    WScript.Echo (strDateOut);

DateTime: generic date and time script in perl

drefty (drefty) — Fri, 02 Dec 2005 05:27:40 GMT



### begin_: file metadata

    ### 

    ### main:

    ###   - name : DateTime.pl

    ###     desc : DateTime: generic date and time script in perl

    ###     date : created="Thu 2005-12-01 10:04:52"

    ###     last : lastmod="Thu 2005-12-01 10:04:59"

    ### 



### begin_: initialize perl (optional)

    use strict;

    use warnings;



### begin_: initialize DateTime values

    my %dttime = ();

    my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = localtime(time);



### begin_: initialize DateTime number formats

    $dttime{year }  = sprintf "%04d",($year + 1900);  ## four digits to specify the year

    $dttime{mon  }  = sprintf "%02d",($mon + 1);      ## zeropad months

    $dttime{mday }  = sprintf "%02d",$mday;           ## zeropad day of the month

    $dttime{wday }  = sprintf "%02d",$wday + 1;       ## zeropad day of week; sunday = 1;

    $dttime{yday }  = sprintf "%02d",$yday;           ## zeropad nth day of the year

    $dttime{hour }  = sprintf "%02d",$hour;           ## zeropad hour

    $dttime{min  }  = sprintf "%02d",$min;            ## zeropad minutes

    $dttime{sec  }  = sprintf "%02d",$sec;            ## zeropad seconds

    $dttime{isdst}  = $isdst;



### begin_: xnpDate print iso8601 version date

    print "$dttime{year}-$dttime{mon}-$dttime{mday}\n";



### begin_: xnpNow show system time

    print "$dttime{year}-$dttime{mon}-$dttime{mday} $dttime{hour}:$dttime{min}:$dttime{sec} \n";

How Old

Will_Rickards (Will Rickards) — Fri, 02 Sep 2005 00:06:01 GMT

Javascript function to determine how old someone is.



// ---------------------------------------------------------------------------|

// qryHowOld                                                                  |

// Description: How old someone is in the format:                             |

// XXX Years XX Months X Weeks X Days                                         |

// Birth Date could be specified like Date.UTC(2002,8,16,17,42,0)             |

//                                                                            |

// Arguments:                                                                 |

//    varAsOfDate: as of date                                                 |

//    varBirthDate: birth date                                                |

//                                                                            |

function qryHowOld(varAsOfDate, varBirthDate)

   {

   var dtAsOfDate;

   var dtBirth;

   var dtAnniversary;

   var intSpan;

   var intYears;

   var intMonths;

   var intWeeks;

   var intDays;

   var intHours;

   var intMinutes;

   var intSeconds;

   var strHowOld;



   // get born date

   dtBirth = new Date(varBirthDate);

   

   // get as of date

   dtAsOfDate = new Date(varAsOfDate);



   // if as of date is on or after born date

   if ( dtAsOfDate >= dtBirth )

      {



      // get time span between as of time and birth time

      intSpan = ( dtAsOfDate.getUTCHours() * 3600000 +

                  dtAsOfDate.getUTCMinutes() * 60000 +

                  dtAsOfDate.getUTCSeconds() * 1000    ) -

                ( dtBirth.getUTCHours() * 3600000 +

                  dtBirth.getUTCMinutes() * 60000 +

                  dtBirth.getUTCSeconds() * 1000       )



      // start at as of date and look backwards for anniversary 



      // if as of day (date) is after birth day (date) or

      //    as of day (date) is birth day (date) and

      //    as of time is on or after birth time

      if ( dtAsOfDate.getUTCDate() > dtBirth.getUTCDate() ||

           ( dtAsOfDate.getUTCDate() == dtBirth.getUTCDate() && intSpan >= 0 ) )

         {



         // most recent day (date) anniversary is in as of month

         dtAnniversary = 

            new Date( Date.UTC( dtAsOfDate.getUTCFullYear(),

                                dtAsOfDate.getUTCMonth(),

                                dtBirth.getUTCDate(),

                                dtBirth.getUTCHours(),

                                dtBirth.getUTCMinutes(),

                                dtBirth.getUTCSeconds() ) );



         }



      // if as of day (date) is before birth day (date) or

      //    as of day (date) is birth day (date) and

      //    as of time is before birth time

      else

         {



         // most recent day (date) anniversary is in month before as of month

         dtAnniversary = 

            new Date( Date.UTC( dtAsOfDate.getUTCFullYear(),

                                dtAsOfDate.getUTCMonth() - 1,

                                dtBirth.getUTCDate(),

                                dtBirth.getUTCHours(),

                                dtBirth.getUTCMinutes(),

                                dtBirth.getUTCSeconds() ) );



         // get previous month

         intMonths = dtAsOfDate.getUTCMonth() - 1;

         if ( intMonths == -1 )

            intMonths = 11;



         // while month is not what it is supposed to be (it will be higher)

         while ( dtAnniversary.getUTCMonth() != intMonths )



            // move back one day

            dtAnniversary.setUTCDate( dtAnniversary.getUTCDate() - 1 );



         }



      // if anniversary month is on or after birth month

      if ( dtAnniversary.getUTCMonth() >= dtBirth.getUTCMonth() )

         {



         // months elapsed is anniversary month - birth month

         intMonths = dtAnniversary.getUTCMonth() - dtBirth.getUTCMonth();



         // years elapsed is anniversary year - birth year

         intYears = dtAnniversary.getUTCFullYear() - dtBirth.getUTCFullYear();



         }



      // if birth month is after anniversary month

      else

         {



         // months elapsed is months left in birth year + anniversary month

         intMonths = (11 - dtBirth.getUTCMonth()) + dtAnniversary.getUTCMonth() + 1;



         // years elapsed is year before anniversary year - birth year

         intYears = (dtAnniversary.getUTCFullYear() - 1) - dtBirth.getUTCFullYear();



         }



      // to calculate weeks, days, hours, minutes and seconds

      // we can take the difference from anniversary date and as of date



      // get time span between two dates in milliseconds

      intSpan = dtAsOfDate - dtAnniversary;



      // get number of weeks

      intWeeks = Math.floor(intSpan / 604800000);



      // subtract weeks from time span

      intSpan = intSpan - (intWeeks * 604800000);

      

      // get number of days

      intDays = Math.floor(intSpan / 86400000);



      // subtract days from time span

      intSpan = intSpan - (intDays * 86400000);



      // get number of hours

      intHours = Math.floor(intSpan / 3600000);

    

      // subtract hours from time span

      intSpan = intSpan - (intHours * 3600000);



      // get number of minutes

      intMinutes = Math.floor(intSpan / 60000);



      // subtract minutes from time span

      intSpan = intSpan - (intMinutes * 60000);



      // get number of seconds

      intSeconds = Math.floor(intSpan / 1000);



      // create output string     

      if ( intYears > 0 )

         if ( intYears > 1 )

            strHowOld = intYears.toString() + ' Years';

         else

            strHowOld = intYears.toString() + ' Year';

      else

         strHowOld = '';



      if ( intMonths > 0 )

         if ( intMonths > 1 )

            strHowOld = strHowOld + ' ' + intMonths.toString() + ' Months';

         else

            strHowOld = strHowOld + ' ' + intMonths.toString() + ' Month';

           

      if ( intWeeks > 0 )

         if ( intWeeks > 1 )

            strHowOld = strHowOld + ' ' + intWeeks.toString() + ' Weeks';

         else

            strHowOld = strHowOld + ' ' + intWeeks.toString() + ' Week';



      if ( intDays > 0 )

         if ( intDays > 1 )

            strHowOld = strHowOld + ' ' + intDays.toString() + ' Days';

         else

            strHowOld = strHowOld + ' ' + intDays.toString() + ' Day';



      if ( intHours > 0 )

         if ( intHours > 1 )

            strHowOld = strHowOld + ' ' + intHours.toString() + ' Hours';

         else

            strHowOld = strHowOld + ' ' + intHours.toString() + ' Hour';

 

      if ( intMinutes > 0 )

         if ( intMinutes > 1 )

            strHowOld = strHowOld + ' ' + intMinutes.toString() + ' Minutes';

         else

            strHowOld = strHowOld + ' ' + intMinutes.toString() + ' Minute';



      if ( intSeconds > 0 )

         if ( intSeconds > 1 )

            strHowOld = strHowOld + ' ' + intSeconds.toString() + ' Seconds';

         else

            strHowOld = strHowOld + ' ' + intSeconds.toString() + ' Second';



      }

   else

      strHowOld = 'Not Born Yet'



   // return string representation

   return strHowOld

   }   

//                                                                            |

// qryHowOld                                                                  |

// ---------------------------------------------------------------------------|