The core skills.
WHAT TO KNOW FIRST
How to find a command for a task How to see what a command requires How to see what an object contains How to get examples
WHAT THE PIPELINE DOES
Passes objects from one command to the next.
WHAT TO DO WITH IT
Filter early, then select, then act.
WHY FILTER EARLY
Passing fewer objects forward is faster, particularly against remote services.
WHAT TO USE FOR REPEATED VALUES
Variables.
WHAT TO USE FOR REPEATED LOGIC
Functions.
WHAT TO KNOW ABOUT ERRORS
Some stop execution; most do not, by default.
WHY THAT MATTERS
A script continues after a failure and produces incorrect results.
WHAT TO SET
Error handling that stops on failure, deliberately.
WHAT TO USE
Structured error handling, catching and acting.
WHAT TO ALWAYS INCLUDE IN A SCRIPT
What it does, in a comment block Parameters, declared properly Output showing what it did
WHAT TO AVOID
Hard-coded values that should be parameters Assuming the working location
