Messages to Nowhere

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What Quality Means

I was blown away when I read the first part of this talk given by Joel Spolsky at Yale, because it so totally nails problems I’ve seen at Microsoft and problems at my alma mater.
I was also reminded of Will Shipley’s excellent article on the limitations of unit-testing.

Crash Logs

Daniel Jalkut on how to get the most out of crash logs. It’s good advice.
Actually I do have one big issue with the article:
If there’s one behavior of your application that you should focus on eliminating, it’s the behavior of crashing. Above all other “nuisances,” this is the one that is absolutely unacceptable.
But preserving someone’s [...]

How Fast Do People Type?

Less than half the population of the world has the manual dexterity to wiggle their fingers at the speed of 50 words per minute or better.
–Dr. Alan Lloyd, seminal typing instructor.
Computer professionals often seem to have unrealistically high expectations of what the “average” typist can do. For example, according to this Wikipedia article (as of [...]

Hick’s Law

I do not put much faith in Hick’s Law. I’ve seen it misapplied and drastically misinterpreted. Its limits, and edge-cases, are not widely known. I am convinced that it is generally not a dominant factor, even when it is relevant. I don’t agree with many design choices it is used to justify. In [...]

Yes

Interesting, and useful tidbit:
Just a curiosity, but it happens that in a yes-no binary response test, the reaction time to select “no” is longer than for “yes.”
Source
This is worth investigating further, but tonight I’m bushed. If anyone has any more information, especially quantitative data, I’d love to hear it.

Design Process: Current Location “Headline”

This is a bit of the design process behind one line of one settings panel inside IMLocation.
The “Locations” panel controls everything having to do with to locations. The pane’s “headline”, outlined in red, shows what is assumed to be the current location.

It reads like “Your current location is home”. It does not say [...]

When Computers Kill: Radiation Overdose

I was watching BBC News on EyeTV this morning, and caught the tail end of a horrific story about hundreds of French patients who received crippling, and sometimes fatal, overdoses of radiation.
Earlier this year, a major scandal erupted in France when it was discovered that between 1989 and 2006, two radiotherapy units had accidentally given [...]

MacOSX Redesign: Feedback for “Hold Keys”

To prevent particularly bad slips (errors while performing the physical actions required to achieve a goal), Apple makes certain keys hold keys. That means you have to hold them down for a while before they do their thing, unlike any other button that you just tap to use. This prevents accidentally engaging the [...]

Assert Outlet Connections

This simple NSCAssert has saved me a lot of bother. In any class that has an IBOutlet connected to something, Put
NSCAssert(outlet1 && outlet2 && … && outletn, @”An outlet got disconnected!”);
in the awakeFromNib method. Then if you ever accidentally disconnect an outlet, you’ll find out about it quickly.
I think this is a worthwhile [...]