Programming Leftovers
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Release day - Hubert Figuière
It's release day, sorta. Both libopenraw and Exempi got a new release within two days. Here is what's up.
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More detail on software requirements
My talk at AppDevCon discussed the Requirements Trifecta but turned it into a Quadrinella: you need leadership vision, market feedback, and technical reality to all line up as listed in the trifecta, but I’ve since added a fourth component. You also need to be able to tell the people who might be interested in paying for this thing that you have it and it might be worth paying for. If you don’t have that then, if anybody has heard of you at all, it will be as a company that went out of business with a product “five years ahead of its time”: you were able to build it, it did something people could benefit from, in an innovative way, but nobody realised that they needed it.
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Sequencing
Sequencing is doing things in the right order. At a macro level, it's about inflection points – Uber couldn't have existed without Google Maps and consumer GPS. But the tougher to solve and more interesting type of sequencing is when the goal is obvious, but the path unknown.
It's difficult because you can't always mimic past successes – an olympian's workout plan might be optimal, but not for someone just starting out. It's also difficult because you can't even copy the order – the temporal aspect of "the right time" means that the "right order" is always changing.
Some examples of sequencing across different disciplines.
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Managing risk in blockchain deployments
Blockchains have significantly different constraints, security properties, and resource requirements than traditional data storage alternatives. The diversity of blockchain types and features can make it challenging to decide whether a blockchain is an appropriate technical solution for a given problem and, if so, which type of blockchain to use. To help readers make such decisions, the report contains written and graphical resources, including a decision tree, comparison tables, and a risk/impact matrix.
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Charting Kaggle’s growth to 10 million users | R-bloggers
A few days ago, the Kaggle community crossed the amazing milestone of 10 million registered users! In celebration, I’ve put together a forum post that visualises the accelerated growth over the years. Here I show the R code behind those plots and talk a bit about my visualisation choices.
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Visualizing the Invasion of the Soviet Union with Luftwaffe Locations
On June 22 1941 (81 years ago) Nazi Germany invaded the Soviet Union with the largest military force assembled in history. Behind the ground troops the Luftwaffe (German Air Force) quickly setup forward bases to support the campaign. Using data from http://ww2.dk I put together an infographic visualizing the monthly movements of the Luftwaffe during this time (map borders are current not the ones that existed in 1941).
One can see planes flying into Poland from the west (Denmark, Norway, France, Belgium, and The Netherlands were conquered the previous year) and Greece (conquered the previous month) right before the campaign. As the Germans advanced along the Northern, Central, and Southern fronts one can also see the indecisive plan of attack. First they locate more planes to the North to attack Leningrad and then shift focus to the attack on Moscow.
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Style scoping versus shadow DOM: which is fastest?
My new benchmark largely confirmed my previous research, and shadow DOM comes out as the most consistently performant option. Class-based style scoping slightly beats shadow DOM in some scenarios, but in others it’s much less performant. Firefox, thanks to its multi-threaded style engine, is much faster than Chrome or Safari.
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Shell vs R Fundamentals – From Syntax to Control Structures with Zsh & BASH
This walkthrough of the fundamentals of shell programming with Z shell (Zsh) and Bourne Again SHell (BASH) includes a comparison of similar components and features in R and RStudio. An alternate perspective from R is provided for you to leverage while learning the fundamentals of shell programming.
It is important to be aware of the similarities and differences between Zsh and BASH when working with shell programming, particularly considering that Zsh is the default shell for Mac systems as of macOS Catalina, while BASH is the default shell of most distributions of Linux operating systems (OS). BASH is also included in the infrastructure of many remote servers.
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