Components are the units of deployment — JARs, DLLs, shared libraries. Martin traces their history from early relocatable binaries to modern package managers, establishing the foundation for the component cohesion and coupling principles that follow.
`git cherry-pick` copies one or more commits from anywhere in the repository and applies them to the current branch as new commits. The original commits remain.
A **fixup** commit is a special type of squash commit that targets a specific earlier commit for amendment. When you run `git rebase --autosquash`, Git.
`git log` shows the commit history of the current branch — or any branch, range, file, or author you specify.
The **reflog** (reference log) is a local journal of every place `HEAD` and your branch pointers have pointed to, in chronological order. Every time you.
**Rule of thumb:** - Use `git reset` on **local, unpushed** changes - Use `git revert` on **pushed or shared** history
**Squashing** combines multiple commits into a single commit. This is used to clean up a messy feature branch before merging — turning a series of `wip`, `fix.