Age & Anniversary Calculations

[Bob Sneidar]

Wasn't there a recent post that indicated this would not work? Anything before a certain date (I forget what it was) would be a day off?

Bob


On May 21, 2012, at 9:38 AM, Peter M. Brigham, MD wrote:

> Here's what I use for #1:
> 
> function doAge tDate,asOf
>   -- return the age given birthdate = <tDate>
>   -- as of the date <asOf> (if empty, assumes today)
>   convert tDate to dateItems
>   if asOf = empty then
>      put the date into asOf
>   end if
>   convert asOf to dateitems
>   put item 1 of asOf - item 1 of tDate - 1 into tAge
>   put item 1 of asOf into item 1 of tDate
>   convert tDate to seconds
>   convert asOf to seconds
>   if tDate <= asOf then add 1 to tAge
>   return tAge
> end doAge
> 
> -- Peter
> 
> Peter M. Brigham
> pmbrig at gmail.com
> http://home.comcast.net/~pmbrig
> 
> 
> On May 21, 2012, at 3:02 AM, Igor de Oliveira Couto wrote:
> 
>> Dear LC Folks,
>> 
>> What is the 'best' way to perform these 2 calculations with LiveCode?
>> 
>> 1) Calculate a person's age, given a birthdate:
>> 
>> /*
>>  Calculates the number of birthdays from a given date, up to and including *today*.
>>  @param pBirthDate the birthdate
>>  @return a positive integer representing the number of birthdays from pBirthDate to today.
>> */
>> function currentAge pBirthDate
>>  ...?
>> end currentAge
>> 
>> 
>> 2) Calculate whether an *anniversary* falls within a time frame - ie., within a week, within 2 weeks, within a month of today:
>> 
>> /*
>>  Determines whether an anniversary date is close to a 'reference date'.
>>  @param pAnniversaryDate the anniversary date
>>  @param pReferenceDate the date that is supposed to be 'close' - or not - to the anniversary date
>>  @pTimeFrame a time period, in seconds, that determines what 'close' is: it can be 1 day, 7 days, 1 month, etc.
>>  @return a boolean: if the anniversary date is sufficiently 'close' (as specified by pTimeFrame) to the reference date,
>>  then it returns TRUE, otherwise it returns FALSE.
>> */
>> function isAnniversaryClose pAnniversaryDate, pReferenceDate, pTimeFrame
>>  ...?
>> end isAnniversaryClose
>> 
>> I'm not being lazy, but the algorithms I came up with look so 'convoluted' that I *know* there must be an easier way. I know that usually in every language there is a 'standard' or 'best-practice' way to perform these standard date calculations, so rather than re-inventing the wheel, I thought I'd run it by you, Masters, and be humbled by your experience! :-)
>> 
>> Many thanks in advance,
>> 
>> --
>> Igor Couto
>> Sydney, Australia
>> 
>> 
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> 
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