lesson_1_reflection.txt

How did viewing a diff between two versions of a file help you see the bug that
was introduced?

    Make life eaiser. Especially, when you compare with two files which contain many lines, it is hard to find the differences by jumping your eyes from one to another.

How could having easy access to the entire history of a file make you a more
efficient programmer in the long term?

    It saves a lot of time to retrieving the old version of the code,
    when you have noticed that something wrong with the new version of
    the code.

What do you think are the pros and cons of manually choosing when to create a
commit, like you do in Git, vs having versions automatically saved, like Google
docs does?

    Pros:
    	1. You can choose whenever to commit.
    	2. Save space for some unnessariy commits.
    Cons: 
    	1.Sometimes, people my forget to commit by themselves.
    	2.It's too late to commit when you notice you should commit.

Why do you think some version control systems, like Git, allow saving multiple
files in one commit, while others, like Google Docs, treat each file separately?

    Unlike Google Docs, git treats the data more like a stream of snapshots according to the git offcial website. Git takes a pictures of the files and stores a reference to the snapshot when you commit your files.

How can you use the commands git log and git diff to view the history of files?

    git log: view the history files in macro way. And get know the commit ID.
    git diff: compare with two in micro way, see excactly detail. 

How might using version control make you more confident to make changes that
could break something?

    This allows you try critial features, you still can get back of your old version if new one dose not work.

Now that you have your workspace set up, what do you want to try using Git for?

    Try using git for my next projects.

How could having easy access to the entire history of a file make you a more efficient programmer in the long term?
    Save time to retrieving and comparing file effectively.