Dev tip: read tech doc to speed up develop

 During the development, some tips to speed up the process:

  1. It's crucial to read the documentation of one platform, one package, one tool etc. Understand that we can search lots of helpful docs online, but usually, the direct and original one might be the better one.
  2. First, to go to the functions/methods in the docs fast and to read the arguments, then the requirement of them, also what will be returned by the function. Especially, keep an eye on the default parameters. Some are good, some are not and need to change.

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