Selecting top k items from a list efficiently in Java / Groovy
I recently ran into an interesting problem to solve for my side project: how can I efficiently select the top k elements from a very large list in Java / Groovy? There are many recommendations about how to do that, but I didn't find a comparison of the suggested implementations. This is a crucial problem for my application so I tried out a number of them and here are the results. I chose Groovy fo
Ratpack: Lean & powerful HTTP apps for the JVM
What is Ratpack?Ratpack is a set of Java libraries for building scalable HTTP applications. It is a lean and powerful foundation, not an all-encompassing framework. Want to know more? Check out the manual. More the bookish type? Get “Learning Ratpack” from O'Reilly Media. Have a question or problem? Discuss it now via the Ratpack Community Channel (powered by Slack). One time sign up is required.
Google Guava - Core libraries for Java & Android
Google Guava - Core libraries for Java & AndroidAI-enhanced description The document discusses best practices in Java programming using Google Guava libraries, emphasizing the avoidance of null values, the use of Optional classes to represent optional values, and various precondition checks for method parameters. It also covers object equality and hashcode implementation, as well as fluent compara
sean cassidy : Better Java
Java is one of the most popular programming languages around, but no one seems to enjoy using it. Well, Java is actually an alright programming language, and since Java 8 came out recently, I decided to compile a list of libraries, practices, and tools to make using Java better. This article is on Github. Feel free to contribute and add your own Java tips and best practices. Style Structs The Buil
Event Programming With Google Guava EventBus - Random Thoughts on Coding
It’s a given in any software application there are objects that need to share information in order to get work done. In Java applications, one way of achieving information sharing is to have event listeners, whose sole purpose is to take some action when a desired event occurs. For the most part this process works and most experienced Java developers are used to writing the requisite anonymous inn
Goodbye, checkNotNull - Kengo's blog
Precondition checking like null-checking is very important element for program, but sometimes it becomes boring because it's a defensive technique and far apart from our purpose -- hacking. nullチェックのような前提条件確認はプログラムにおいて非常に大切な要素ではありますが、防御的であり目的を実現するためのコードではないため、時につまらない作業になりがちです。 public MyClass(String name) { if (name == null) { throw new IllegalArgumentException(); } this.name = name; } Yes, I know
進化するJavaライブラリ、Guava
GoogleのJavaユーティリティライブラリであるGuavaは、今年9月28日にリリース10.0.0を迎えました。新たなAPIも追加され、更なる進化を遂げています。（執筆時点での最新リリースは10.0.1） 今回は、まだベータ版ながら新しく追加された興味深いAPIを４つ紹介します。 他のAPIについても、JavaDocなどで@Betaアノテーションがついているものはベータ版ですので、今後のリリースで変更される可能性があります。 Stopwatch プログラムの実行時間を計測したいとき、よく使われるコードがあります。 long t1 = System.currentTimeMillis(); someExpensiveCompute(); long t2 = System.currentTimeMillis(); System.out.printf("time: %sms%n", t2 -
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guava-libraries - Project Hosting on Google Code
Google Code Archive - Long-term storage for Google Code Project Hosting.
Google Guava - Synchronization with Monitor
Google Guava BloomFIlter - Random Thoughts on Coding
http://arantaday.com/the-modern-java-ecosystem