The requirements are a sequence diagram showing a complex back-and-forth with the vendor's web service. Each request and reply is detailed, but there's no overview or summary stated. It's implied, and all of the business folks can articulate it, but no one wrote any of it down.

This looks like …

I'm trying to make sense of the "Voice of the Customer" as the 6σ folks term it.

I get email once in a while on my books (Programming , Python and OO Design ). The volume of mail indicates that I have a few hundred readers. I'm honored to have readers who …

Here's how it shakes out from my point of view. You could say that my bias is showing. I think, however, I have solid evidence for my opinions.

C++. Fine if you like memory management. Don't get me wrong, some people love the nitty-gritty details. Some people would prefer to …

REST is cool because there's less protocol there -- little more than HTTP and some kind of representation for objects (XML, JSON or whatever.) It seems to me that REST with JSON is a very lightweight approach to implementing web services. Doing this in Python further trims down the technology stack …

I want to thank folks for their thoughtful comments.

I clarified a few design points.

Most importantly, I added four new appendices. For Python programmers, I provided examples of unittest, doctest and epydoc. For Java programmers, I provided examples of JUnit and javadoc.

I use the word denormalization heavily, to make a point to a certain class of developers. Other developers object to the term, since it doesn't have a precise meaning.

The point I often have to make this:

1. 3rd Normal Form is for Updates.
2. Data Warehousing is about Insert and Select …

The comment was eaten by Haloscan, but here's the text...

You need to read Rozhenstein on characteristic functions.

select
sum(case when a < .5 then 1 else 0 end) 'A'
,sum(case when a >= .5 and a < .75 then 1 else 0 end) 'B'
,sum(case when a >= .75 then …

First, let me point out that the Data Cartel ("DBA" means Don't Bother Asking) won't release all the information I requested, so some of this is a guess.

We'll look at a number of dumb-as-a-post SQL techniques. This is proof -- if any were needed -- that bad SQL is worse than …

See PC World, "Top 50 Tech Visionaries ."

I spent some quality time reading RFC's once upon a time. It was the mid '90's and a client had a desktop application that depended on embedded FTP client that submitted batch jobs to a mainframe.

[Note. It was the 90's. Desktop computing …

The problem is this: parsing HTML from a variety of sources to create pleasant, easy-to-manipulate spreadsheets. HTML can represent the same data in a variety of ways, even within a single web site. What we have are several layers of parsing; layers which must be linked with increasingly simplified intermediate …