(If you want to get straight to the solution, just click this.)
If you do Functional Programming in Scala, you probably write lots of Algebraic Data Types (ADT). If you’re not sure what it is or why we use or what benefits it offers, here is a good blog post written by Charles O’farrell about The Expression Tradeoff which can give you a good idea of why we use ADT. I strongly recommend reading it.
When I went to Scala Days 2019, I met Shunsuke Tadokoro and he saw me his cool and useful sbt plugin called sbt-project-switcher.
More …I was testing a typeclass instance of BigDecimal in my personal FP library using Hedgehog and found some issue in BigDecimal in Scala 2.13.
There was Scala 2.13.1 release recently and sbt 1.3.0 was release in early September. sbt 1.3.1 was also released just about two weeks after sbt 1.3.0 release.
More …I used to use Ubuntu Linux most of the time, yet I’m using Mac OS X more these days. I’m quite satisfied with it, but there’s one thing inconvenient. That’s installing JDK. On Ubuntu, installing Java 8 (technically what I want to install is JDK 8 but since Java has really terrible versioning history, I’ll just call it Java 8) is not supported by Canonical, but it can be done easily by the PPA provided by Web Upd8 (Thanks Web Upd8).
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- Last Updated: 2013-08-26 * Fixed: Bug in the gitpullall() script. - 2013-07-23
- Refactored: gitpullall() - 2013-08-26
- Updated: gitpullall() - 2015-03-07: Now it can handle branches. So pulling on branch works. The old version always pulled from master. This version uses the name of current branch then get the same one from the remote. (e.g. remote: github, local branch: some-fix <=pull= github/some-fix)
- Added: gitpullall() for Z shell (zsh) - 2015-03-07
It is surprising to see that there are still many people who do not use generics even when they are using JDK 5 or higher. I can often see it especially when I teach some Java programming subjects at uni. Generics can be very useful and I use it a lot in my libraries and projects. So I’d like to talk about generics but not a basic knowledge of it. I will talk about Java generics in real life programming and how it can be useful as well as some unusual cases may occur and annoy you. I am also going to explain some common cases of generics usage in my next post that I have plan to write soon (hopefully). Then I’m going to write about more complex cases in the sense that it’s complex when it’s designed but rather simple when it’s used, and it’s also more practical. It means I’ll probably write two more posts about generics so stay tuned if you’re interested.
More …I’ve renovated my homepage.
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