Is the separation of program logic and presentation layer going too far?

Posted by Timwi on Programmers See other posts from Programmers or by Timwi
Published on 2012-12-16T13:07:20Z Indexed on 2012/12/16 17:20 UTC
Read the original article Hit count: 312

Filed under:

presentation

|

programming-logic

|

separation-of-concerns

In a Drupal programming guide, I noticed this sentence:

The theme hook receives the total number of votes and the number of votes for just that item, but the template wants to display a percentage. That kind of work shouldn't be done in a template; instead, the math is performed here.

The math necessary to calculate a percentage from a total and a number is (number/total)*100. Is this application of two basic arithmetic operators within a presentation layer already too much? Is the maintenance of the entire system severely compromised by this amount of mathematics?

The WPF (Windows Presentation Framework) and its UI mark-up language, XAML, seem to go to similar extremes. If you try to so much as add two numbers in the View (the presentation layer), you have committed a cardinal sin. Consequently, XAML has no operators for any arithmetic whatsoever.

Is this ultra-strict separation really the holy grail of programming? What are the significant gains to be had from taking the separation to such extremes?

© Programmers or respective owner

Related posts about presentation

Hide presentation controls in LaTeX beamer presentation

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I am currently building a presentation using LaTeX beamer. Is there a way to hide the presentation controls on the bottom of the slides? I don't use those controls an they sometimes collide with the slide's text. Thanks for fast answers! >>> More
How to prepare for an interview presentation!

as seen on Oracle Blogs - Search for 'Oracle Blogs'
During an interview process you might be asked to prepare a presentation as one of the steps in the recruitment process. Below, we want to give you some tips to help you prepare for what might be considered a daunting aspect of a recruitment process. Main purpose of the presentation … >>> More
Enabling a Windows Presentation Foundation (WPF) App to Open in Its Last Window Location

as seen on Internet.com - Search for 'Internet.com'
Learn how to get your Microsoft Windows Presentation Foundation (WPF) application to open in its last location before it was closed using VB.NET and application settings. >>> More
Developing a Real-time Autocomplete Control in Windows Presentation Foundation (WPF)

as seen on Internet.com - Search for 'Internet.com'
Create a standalone autocomplete library that can be clubbed into any Windows Presentation Foundation (WPF) application and used with minimal efforts. >>> More
Predicting Likelihood of Click with Multiple Presentations

as seen on Oracle Blogs - Search for 'Oracle Blogs'
When using predictive models to predict the likelihood of an ad or a banner to be clicked on it is common to ignore the fact that the same content may have been presented in the past to the same visitor. While the error may be small if the visitors do not often see repeated content, it may be… >>> More

Related posts about programming-logic

How can I make my Programming Logic stronger?

as seen on Stack Overflow - Search for 'Stack Overflow'
How can I make my Programming Logic stronger? >>> More
Programming logic to group a users activities like Facebook

as seen on Programmers - Search for 'Programmers'
So I am trying to develop an activity feed for my site. Basically If I UNION a bunch of activities into a feed I would end up with something like the following. Chris is now friends with Mark Chris is now friends with Dave What I want though is a neater way of grouping these similar posts… >>> More
programming logic and design pleas friends i need a flowcharts or pseudocode

as seen on Stack Overflow - Search for 'Stack Overflow'
***the midvile park maintains records containing info about players on it's soccer teams . each record contain a players first name,last name,and team number . the team are team number team name 1 goal getters 2 the force 3 … >>> More
Programming Logic upgrading from VB6 to Vb.net

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi guys, I have been programming in vb6 for few time ago and i used open SQL Server connection and command objects to make database traansactions. I have been searching for similar approaches in vb.net too but not finding any starting point. How can we work similarly in vb.net application? >>> More
C Programming Logic Error?

as seen on Stack Overflow - Search for 'Stack Overflow'
The following code compiles fine, but does not allow the user to choose whether or not the program is to run again. After giving the user the answer, the program automatically terminates. I placed the main code in a "do while" loop to have the ability to convert more than one time if I wanted too… >>> More