Practical notes for developers and system engineers
Inspect saved Git changes with stash list and show before restoring them. Check filenames, patches and saved untracked files, with quoted selectors for PowerShell.
Understand detached HEAD, keep useful commits on a new branch, and return safely after inspecting an earlier commit.
Use command -v, type -a and type -t in Bash to identify executable paths, builtins, functions and aliases before changing PATH or shell settings.
Diagnose unexpected false results from Array.includes(): compare types, object references, some() property tests, NaN, and the starting index.
Find which ignore rule matches a path, check whether Git already tracks the file, and interpret --no-index, exceptions, and parent-directory patterns.
Use git diff --check in PowerShell to find trailing whitespace, inspect staged changes, stage corrections again, and understand exit codes and untracked files.
Use git restore --staged to remove changes from the next commit while preserving the working file. Verify both diffs and understand new-file and HEAD cases.
Fix numeric ordering with sort comparators, sort descending, preserve the input array and order objects by numeric properties.
Learn why identical-looking Unicode strings compare differently, how NFC and NFKC change them, and how to preserve names while creating search keys.
Update an existing Git clone to a moved repository, check fetch and push URLs, and verify access without recloning.