Jay Bazuzi's coding blog

This week we ran a #mobprogramming session with 35 people. Here are some notes about how that went: READ MORE

Port And Transport And Port I use Ports-and-Adapters to abstract away my application’s interactions with external systems. I bend the de...

I'm experimenting with a new blog. I hope it will be easier to right better technical posts if I can use Markdown. Check it out: http:...

Ports-and-Adapters is a good design approach for separating business logic from external dependencies, aka Mine vs. Thine. Like all good ...

Don't just refactor for fun. Refactor in service of delivering business value. If there's some terrible code that you never need to ...

Sometimes when people learn about the  Agile Fluency Model  they think of the first zone as "not very good". We should of course b...

If you're looking for something to improve in your code, the #1 thing is not in this blog post. It's Naming is a Process . The #2 ...

Here's a way to quickly find a bug in any legacy code: Step 1: Find a case-insensitive string comparison. boost::remove_erase_if(...

Traditional teams count "# of active bugs" and "# of bugs fixed per week" and the like. These drive the wrong behavi...

If you have legacy code, you should strive to make things slightly better every day. (Sometimes referred to as the scout rule). There...

I propose a refactoring "Extract Open Source Project". We build software systems to some purpose. But when I read code, I see th...

I like to say that tests should, first and foremost, be a human-readable spec . Let's look at what that can mean for how we write asse...

I strive to make all my tests be both microtests and acceptance tests, an idea I learned from Arlo Belshee. When I say this to people, the...

My new job involves teams that are distributed over a bunch of locations, mostly on the West Coast of the USA. Each team has people at multi...

Moved here for better formatting:  http://jay.bazuzi.com/Safely-extract-a-method-in-any-C++-code/

I wrote this on the C2 Wiki, with the hopes that other people would help improve it. But now that site is down, so I'm posting it here: ...

Given a lambda with a captured local variable, Add a new parameter to the lambda Inside the lambda, replace uses of the local with uses o...

Given a statement block, wrap it in a lambda assigned to an Action variable, and execute it immediately. Loading Gist 21a92bc8770caf19bf...

Sometimes we categorize tests into groups like "pure unit test", "focused integration test", "end-to-end-test"...

As an Open Source contributor... I find an interesting open source project that I want to contribute to. I fork/clone the repository to...

I often advocate for good engineering practices and the path to Zero Bugs . Talking about these things is great and all, but concrete exampl...

The Problem Primitive Obsession is one of the most pervasive code smells out there. You can address it by moving a primitive in to a simpl...

I rely on automated Extract Method to do the right thing, regardless of test coverage. This is a key part of attacking legacy code that lack...

Imagine you are trying to write a unit test for some code, but you're finding it difficult. Maybe there's some complex detail in t...

Resources Mobbing time lapse – a full day in 3 minutes Woody Zuill keynote – how they found mobbing Some Helpful Observations for su...

I am writing in response to this tweet: @arlobelshee @moshjeier @jaybazuzi @lisacrispin @dwhelan I agreed for some def'n of term...

Neo: What are you trying to tell me? That I can catch all my bugs in testing?    Morpheus: No, Neo. I'm trying to tell you that when ...

There's a ton of variation out there in how teams set up the pipeline from "edit code" to "live in production". I wa...

I've noticed that people often use these terms interchangeably. And when I look at the kinds of tests they're talking about, I see...

Eric Gunnerson once wrote about the idea that, in programming language design, every potential language feature starts with "minus 100 ...

In response to my Why we Test posts , George Dinwiddie had this to say: Good collection of "whys." I'm also looking for ...

#15 in my list of reasons why we (unit) test, which I learned from James Shore: Refactoring without tests is inherently unsafe, because of...

Problem: There are two ways people seem to want to use a backlog: A) To sort by priority, so the next thing we do is the most important ...

I've been trying to get System.Web.Http.HttpRouteCollection.GetRouteData() to work in ASP.NET WebApi recently, and had a hard time of it...

I think that the DRY principle is a subset of* "Low Coupling". DRY & Coupling: If one rule is expressed in two places in yo...

I used to believe that the two most important refactorings were Extract Method and Rename. The way they deliver value and the way they are u...

In code, naming things well is incredibly powerful. Names help with expressing intent, increasing cohesion, and identifying duplication. B...

I realized that before even the first rule of software estimating  must come: Know why you are estimating. We take it for granted that sof...

The more error there is in your estimates, the less precise you must be. That's based on my past experience with being wrong a lot, a...

Take a list of pieces of work you might do. Stories, features, products, I don't care. Find two that are the same size. Approximately. ...

This comes up in conversation often enough that I want to write it down.. Context: My code talks to an external dependency that is awk...

Metrics are tricky. Plenty of ink has been spilled on that topic, so I'll leave it for now. Around bugs, I know of 4 interesting metri...