Apr 09
Almost ashamed to admit I did this, yet it’s still kinda cool. I use awk for a lot of commandline parsing; I learned it back in 1989…. before perl was much of a thing. For some problems, awk “just works”. So I was wanting to count the number of instances of ‘A’ in a collection …
Apr 07
Note: This behaviour was observed on a Pi B+; it was not observed on a Pi 2. I happened to have top up while doing the bonded Nic test and noticed that the load was awfully high. Then the following popped up: Cron pretty much has the CPU pegged. Once I saw this, I wondered …
Apr 06
There is nothing wrong with your docker host. Do not attempt to adjust the picture. We are controlling transmission. If we wish to make it louder, we will bring up the volume. If we wish to make it softer, we will tune it to a whisper. We will control the horizontal. We will control the …
Mar 23
Size does matter. Docker images can become quite large as each RUN generates a new layer which becomes part of the image, even if it’s not in the final container. This wastes disk space and network bandwidth. The following are some steps for shrinking the size of a docker container in which builds have been …
Mar 22
After a time, Docker containers and images build up and can eat disk space. Failed docker build invocations can leave a lot of artifacts behind. The following commands can help. Many of them say ‘not all containers could be removed’; this has to do with the header from docker ps. Usually this can be ignored. …
Mar 19
The particular algorithm used in calculating Pi is one which converges to Pi as you add terms; it’s not calculating out to a number of digits, although I might try that one as well at some point. Here’s the output from a run; it’s interesting how it gets closer and closer, but… Another interesting thing …
Mar 17
But look, you found the notice, didn’t you? Yes yes I did. It was on display at the bottom of a locked filing cabinet stuck in a disused lavatory with a sign on the door saying Beware of the Leopard. — Mr. Prosser and Arthur Dent, The Hitchhiker’s Guide to the Galaxy While digging through …
Mar 17
EDIT: The metrics below are skewed. Not all JVM’s are created equal. For updated metrics on the Pi, please see JVM Choice Matters (a lot!). What better thing to do on Pi Day than to calculate Pi? I figured while I’m at it, I might as well do some performance testing of the Raspberry Pi …
Feb 25
The following is fixing the wrong problem, but often technology is easier than people problems. $WORK removed the ability to use plugins with Chrome without having to go through a bureaucratic process lasting weeks. One tool I’ve found useful is the ability to copy the title and link of a page to the clipboard and …
Feb 12
DZone is conducting a survey of Developer Personality Types along the lines of a Meyers-Briggs analysis. They plan to shortly release the results, but will leave the “quiz” up after. If you’re curious about your developer type, you can take it at: Full Personality Test Short Personality Test Here’s my results from the full test …
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