Gangmax Blog

自由之思想,独立之精神

What Is Merkle DAG

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From here.

A Merkle DAG is a Merkle directed acyclic graph. That is a data structure similar to a Merkle tree but not so strict: such DAG does not need to be balanced and its non-leaf nodes are allowed to contain data.

VirtualBox 6.0

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VirtualBox 6.0 was released on Dec 18th, 2018. This is a major version upgrade. The biggest improvement for me is the HiDPI support. It makes the Ubuntu VM in my MacBook host be able to leverage the high resolution display.

Flatpak & OpenRA

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Flathub, the home of hundreds of apps which can be easily installed on any Linux distribution. Browse the apps online, from your app center or the command line.

Jigsaw: The Java Standard Module System

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Jigsaw is the Java standard module system released with JDK 9. The whole JDK 9 is reorganized with Jigsaw. That means after JDK 9, you will not find the huge “rt.jar” file in the JDK directory, instead a “$JDK_PATH/jmods” directory full of “*.jmob” files is introduced and all the files in it are the module files.