The Scala Programming Language
val fruits = List("apple", "banana", "avocado", "papaya") val countsToFruits = // count how many 'a' in each fruit fruits.groupBy(fruit => fruit.count(_ == 'a')) for (count, fruits) <- countsToFruits do println(s"with 'a' × $count = $fruits") // prints: with 'a' × 1 = List(apple) // prints: with 'a' × 2 = List(avocado) // prints: with 'a' × 3 = List(banana, papaya)
Jenkins: Shifting Gears
Kohsuke here. This is a message for my fellow Jenkins developers. Jenkins has been on an amazing run, but I believe we are trapped in a local optimum, and losing appeal to people who fall outside of our traditional sweet spot. We need to take on new efforts to solve this. One is “cloud native Jenkins” that creates a flavor of Jenkins that runs well on Kubernetes. The other is “gear shift”, where w
Traditional Development/Integration/Staging/Production Practice for Software Development - Disruptive Library Technology Jester
These list items are microformat entries and are hidden from view. https://dltj.org/article/software-development-practice/ Recently, I was asked to outline a plan for a structured process for software development that maximizes productivity and reduces bugs that reach the user. This was originally an internal OhioLINK document, but the process described is pretty traditional and others might find
Docker Compose wait for container X before starting Y
I am using rabbitmq and a simple python sample from here together with docker-compose. My problem is that I need to wait for rabbitmq to be fully started. From what I searched so far, I don't know how to wait with container x (in my case worker) until y (rabbitmq) is started. I found this blog post where he checks if the other host is online. I also found this docker command: wait Usage: docker wa
Nondeterministic "No such file or directory" failure when cleaning project · Issue #2156 · sbt/sbt
[default-tests-sbt] $ /usr/lib/jvm/java-8-oracle/bin/java -Dsbt.log.noformat=true -Xmx2G -jar /var/lib/jenkins/tools/org.jvnet.hudson.plugins.SbtPluginBuilder_SbtInstallation/SBT_default_launcher/bin/sbt-launch.jar clean test:clean buildUmp test [info] Loading project definition from /var/lib/jenkins/workspace/default-tests-sbt/project [info] Set current project to ump (in build file:/var/lib/jenk
default-address-pools can not be specified in configuration · Issue #3108 · docker/for-mac
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Elasticsearch Hot Warm Architecture
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About | MailSlurper
MailSlurper is a small SMTP mail server that slurps mail into oblivion! MailSlurper is perfect for individual developers or small teams writing mail-enabled applications that wish to test email functionality without the risk or hassle of installing and configuring a full-blown email server. It's simple to use! Simply set up MailSlurper, configure your code and/or application server to send mail th
setting-the-hostname-fqdn-or-short-name
I've noticed that the "preferred" method of setting the system hostname is fundamentally different between Red Hat/CentOS and Debian/Ubuntu systems. CentOS documentation and the RHEL deployment guide say the hostname should be the FQDN: HOSTNAME=<value>, where <value> should be the Fully Qualified Domain Name (FQDN), such as hostname.example.com, but can be whatever hostname is necessary. The RHEL
Chef Blog - IT Automation for everything from configuration management to continuous delivery. | Chef
The primary objective of IT automation is to make processes related to infrastructure faster, more secure and error-free. Chef SaaS enables you to automate your IT infrastructure with the power of the cloud. Now, all your favorite Chef tools are available as SaaS. No setup hassles, no maintenance and no extra resources required. Read on to learn more.
Java プログラムでホスト名の名前解決ができなくなる原因。JVM の DNS キャッシュの仕組みと、キャッシュの有効期間を変更する方法 - Qiita
Java プログラムでホスト名の名前解決ができなくなる原因。JVM の DNS キャッシュの仕組みと、キャッシュの有効期間を変更する方法Java JVM は ホスト名を解決すると IP アドレスをキャッシュします。 発生する問題 あるサーバのホスト名が変化しなくても、IP アドレスが変わると、 Java のプログラムからそのサーバにアクセスできなくなることがあります。 具体的には、 AWS の ELB はホスト名が変わらずに IP アドレスだけ勝手に変化することがあるので、そのような場合に、名前解決に失敗します。 もちろんサーバ側の管理者が DNS の A レコードを変更したときにも発生するので、 AWS のみならず一般的に起き得ます。 どのようにキャッシュしている？ キャッシュを保持してある場所 InetAddress クラスがキャッシュを保持しています。 キャッシュが存在する限り、名前
Kibana 6.2.0 is released
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RFC 7239 – Forwarded HTTP Header | c960657.github.io
git - How do I remove a submodule? - Stack Overflow
Allow user to specify default address pools for docker networks by selansen · Pull Request #36396 · moby/moby
Extract passphrase from Jenkins' credentials.xml - Stack Overflow
Metal Renderer · Wiki · George Nachman / iterm2 · GitLab
#1316 ($http_ variables only contain the first field-value) – nginx
GitHub - jenkinsci/configuration-as-code-plugin: Jenkins Configuration as Code Plugin
