Ben Chuanlong Du's Blog

It is never too late to learn.

Tips on YAML

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

General Tips and Traps

  1. YAML is much better alternative to JSON. TOML is another good alternative to YAML.

Ranges in YAML

https://stackoverflow.com/questions/48199439/use-range-with-stepsize-in-yaml-file

YAML for Rust

Please …

Tips on ssh-keygen

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

Use the following command to generate new RSA keys without prompt questions.

ssh-keygen -q -y -t rsa -N '' -f ~/.ssh/id_rsa

GCP Compute Engine VM Instances

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

GCP

GCP c2 and c3 VMs are good choices according to performance per price. It's even cheaper than customized VM types with reduced memories! GCP c2 VMs are compute optimized and are ideal for CPU intensive workloads. Note that GCP c2 spot VMs are even cheaper than AWS t2.nano VMs if you can stand your VM being preempted.

`ifelse` on Pandas Series

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

Series.apply + Lambda Function

DataFrame.apply + Lambda Function

axis=1: apply the lambda function on each row

List Comprehension

numpy.where

numpy.where is vectorized ifelse.