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Mark Needham10/26/14
1826 views
2 replies

R: Linear models with the lm function, NA values and Collinearity

In my continued playing around with R I’ve sometimes noticed ‘NA’ values in the linear regression models I created but hadn’t really thought about what that meant. On the advice of Peter Huber I recently started working my way through Coursera’s Regression Models which has a whole slide explaining its meaning:

Steven Lott10/24/14
2120 views
1 replies

Using Bottle as a miniature demo server

Bottle doesn't do much. But what little it does do is a pretty tidy fit with tiny little demonstrations of super-simple HTML interactions.

Anders Abel10/24/14
6336 views
0 replies

Partial Commits with Git

Every once in a while I’m working on a feature, only to discover that I need to extend another part of the code first. If I was disciplined, I would create another branch at that point. But I’m not.

Allan Kelly10/24/14
6710 views
0 replies

Contracts for Agile

Last week I did a presentation to the Agile 4 Agencies meet up group on the topic of “Agile Contracts” - although I believe “Contracts for Agile” might have been a better title.

Eric Minick10/24/14
4689 views
0 replies

Testers may never be happy

I suspect that the correlations between methods/tools and confidence are pretty weak. Time to market is key, and teams try to balance quality and time to market. Better approaches to testing and driving quality may not drive higher quality software at release time, but rather bring forward the release.

Cal Evans10/23/14
10150 views
3 replies

What Developers Want Recruiters to Know

I post this not to belittle or ridicule recruiters. I think that good recruiters are a valuable part of the tech ecosystem. I post this to hopefully help more recruiter become good recruiters.

Erich Styger10/23/14
2357 views
2 replies

How NOT to Solder Headers on a Board

When I asked all student groups to solder the headers on the Freescale FRDM-KL25Z board, I received one report that the board does not work any more. A quick inspection of the board showed this:

Bozhidar Bozhanov10/23/14
4375 views
0 replies

Validate Configuration on Startup

Do you remember that time when you spent a whole day trying to fix a problem, only to realize that you have mistyped a configuration setting? Avoiding that is not trivial, as not only you, but also the frameworks that you use should take care. But let me outline my suggestion.

Rob Allen10/23/14
4804 views
0 replies

Git push to multiple repositories

I have a couple of projects where I need to push to more than one repo all the time. I recently discovered that I can create a remote that points to more than one repository using these commands:

Trevor Parsons10/23/14
3029 views
0 replies

6 Challenges Facing DevOps and Operations Teams in 2015

I’m sure you have heard “knowing is half the battle,” and sometimes when in the weeds, you cannot spend the time to reflect on what has happened and what is coming. Knowing what you will face will help you brace and prepare in advance. Here is the list.

John Walter10/22/14
10095 views
2 replies

Dev of the Week: Ajitesh Kumar

Every week here and in our newsletter, we feature a new developer/blogger from the DZone community to catch up and find out what he or she is working on now and what's coming next. This week we're talking to Ajitesh Kumar, Principal Architect with Evoke Technologies.

Remy Sharp10/22/14
1510 views
0 replies

Element focus utility

I've recently been looking at retrofitting keyboard navigation support to JS Bin, but I was immediately struck by the totally lack of visibility on what was in focus. So I built a mini utility to visualise what's happening.

Dave Rooney10/22/14
3963 views
0 replies

Uh Oh... We Discovered More Stories!

While Story Mapping goes a long way towards identifying the work that needs to be completed to deliver a viable system, you will inevitably miss some stories. This is a natural outcome of the discovery process that is inherent to software development.

Johanna Rothman10/20/14
5428 views
0 replies

Small Internal Releases Lead to Happy Customers

Release externally whenever you want. That is a business decision. Separate that business decision from your ability to release internally all the time.

Vinod Kumaar Ra...10/19/14
2165 views
0 replies

Disposable Software

Should we design cost-effective disposable software?