Tips on PlantUML

Apr 30, 2020

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

PlantUML

PlantUML is a great text to UML tool. It can be used to create flowcharts too.

You can try it online at PlantText . You can download the the reference guide …

Apr 29, 2020

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

Apr 28, 2020

It is never a good idea to do pre-mature optimization. Always profile (please refer to Profile Performance of Python Applications and Python Profiler for JupyterLab Notebooks) your code before you optimize it. If you do decide to optimize you Python code, there are multiple approaches. First, think about whether you can improve your algorithm. Please refer to Python Performance Tips

Apr 26, 2020

Apr 24, 2020

The broadcast concept in numpy is essentially a way to "virtually" duplicate data in a numpy array so that it is "virtually" reshaped to be compatible with another numpy array for a certain operation. Do not confused yourself about it with the broadcast concept in Spark which sends a full copy of a (small) DataFrame to each work node for BroadCastJoin

Apr 20, 2020

There are multiple Kotlin kernels for JupyterLab. It is is suggested that you use official one released by JetBrains.

You can add a JAR dependency using the following code.