[AccessD] Math equations

Hans-Christian Andersen hans.andersen at phulse.com
Thu Mar 21 14:04:18 CDT 2013


That graph doesn't surprise me. Microsofties tend not to stray far off the path unless it has Microsoft logo on it or has been blessed by the Don.

- Hans


On 2013-03-21, at 10:14 AM, "Jim Lawrence" <accessd at shaw.ca> wrote:

> Hi Shamil:
> 
> Thanks for the response and the great links. (This should keep me
> entertained for days) 
> 
> Here is a link to an interesting graph that is very telling:
> 
> http://www.dofactory.com/images/javascript-github3.jpg
> 
> Note: that the graph information was acquired from Github and probably not a
> true representation of the entire web based world.
> 
> The Pro JavaScript + jQuery Design Patterns section looks very interesting. 
> 
> Jim 
> 
> -----Original Message-----
> From: accessd-bounces at databaseadvisors.com
> [mailto:accessd-bounces at databaseadvisors.com] On Behalf Of Salakhetdinov
> Shamil
> Sent: Thursday, March 21, 2013 9:16 AM
> To: Access Developers discussion and problem solving
> Subject: Re: [AccessD] Math equations
> 
> Hi Jim --
> 
> Thank you.
> 
> That was just about a month of Software Design Patterns and VB.NET 2003
> "home research project" in October-November 2006.
> I was a kind of "excited' about GoF (
> http://en.wikipedia.org/wiki/Design_Patterns ) and related concepts that
> time and so I decided to "test them in practice".
> The diagrams and all the other web stuff is generated from the VB.NET
> project code by using Enterprise Architect ( http://www.sparxsystems.com/ ).
> 
> BTW,  the best web site on Software Design Patterns I know about is located
> here:   http://www.dofactory.com/Default.aspx
> 
> -- Shamil
> 
> 
> Четверг, 21 марта 2013, 8:15 -07:00 от "Jim Lawrence" <accessd at shaw.ca>:
>> Hi Shamil:
>> 
>> That is incredible! How long did you take to build and populate that series
>> of pages? (from 2006 to now?) Magnificent job.
>> 
>> Jim
>> 
>> -----Original Message-----
>> From:  accessd-bounces at databaseadvisors.com
>> [mailto:accessd-bounces at databaseadvisors.com] On Behalf Of Salakhetdinov
>> Shamil
>> Sent: Thursday, March 21, 2013 1:22 AM
>> To: Access Developers discussion and problem solving
>> Subject: Re: [AccessD] Math equations
>> 
>>  Hi John --
>> 
>> Quick hint: eval(...) and maybe also 'Strategy Pattern' (
>> http://smsconsulting.spb.ru/shamil_s/patterns/calc/index.htm ) - google for
>> the more details of the latter....
>> 
>> Thank you.
>> 
>> -- Shamil
>> 
>> 
>> Среда, 20 марта 2013, 23:16 -04:00 от John W Colby < jwcolby at gmail.com >:
>>> Does anyone know a way to implement "dynamic" math equations in Access?  I
>> am implementing a system 
>>> for building up strings of verbiage for mail merge letters.  The verbiage
>> is dependent on the 
>>> insurer of a loan and the state that the loan is in.  For example it might
>> say something like
>>> 
>>> "Please Bid $X."  X is the result of an equation that may be something
> like
>>> 
>>> X = the greater of FMV or MakeWhole but X must be at least 2/3 TotalDebt.
>>> 
>>> Or it may say something like X = Y% * FMV or TotalDebt whichever is less,
>> where Y% comes from the 
>>> insurer table, i.e. Y is 80% for insurer A, 90% for insurerB and 100a% for
>> InsurerC.
>>> 
>>> The equations can depend on the state but also a % figure taken from the
>> insurer.
>>> 
>>> There are 51 states and 5 insurers so there are a ton of possible
>> combinations / equations.  All of 
>>> which comes from a spreradsheet of text "descriptions" for each insurer
> for
>> each state which I am 
>>> supposed to somehow compute.
>>> 
>>> The old system just used a slew of hard coded equations in huge iif()
>> statements, embedded directly 
>>> in fields in queries.
>>> 
>>> ICK!
>>> 
>>> I would prefer to somehow map this to a small(er)  set of equations with
>> values fed in from the 
>>> state and insurer tables.  The verbiage strings would be stored in the
>> state table, possibly a 
>>> state/insurer table. where the verbiage is in the table with replaceable
>> symbols in the string.  I 
>>> could pull the string out of the table, look for X and run a math function
>> to figure out X and 
>>> substitute the literal X (or other "replaceable character" ) with some
>> dollar amount.
>>> 
>>> And finally I would like to avoid VBA code if possible.  The intent is to
>> eventually move these out 
>>> of Access so if the solution mapped easily into C# that would be good.
>>> 
>>> I have never really seen anything like this implemented (table driven) and
>> I am drawing a blank on 
>>> how to go about it, particularly without resorting to custom VBA
> functions.
>> In the end VBA 
>>> functions are preferable to IIF() statements in custom Access queries.  I
>> could at least "port" VBA 
>>> to C# later.
>>> 
>>> -- 
>>> John W. Colby
>>> 
>>> Reality is what refuses to go away
>>> when you do not believe in it
> -- 
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> 
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