kottans-backend

Version Control with Git

Git Commands Refresher

Nice course to refresh your Git knowledge.

Show commit statistics

$ git log --stat

Display changes made to a file

$ git log --patch
$ git log -p

Ignore whitespace when comparing lines.

$ -w

Display most recent commit

$ git show SHA

Search commits by commit message

git log --all --grep='Convert social links from text to images'

Changes that have been made but haven't been committed, yet

$ git diff

Tag a commit

$ git tag -a beta

Delete a tag

$ git tag -d beta

Change Last Commit

will let you provide a new commit message

$ git commit --amend

• make changes to the necessary files
• save all of the files that were modified
• use git add to stage all of the modified files
• run git commit --amend to update the most-recent commit instead of creating a new one

Undo Changes into a New Commit

$ git revert <SHA-of-commit-to-revert>

Show Detailed Log

$ git log --oneline --graph --decorate --all

Git Intro Completion Screen

Git Collaboration

Sync Remote Repo with Local

pushes changes to a remote

$ git push

Sync Local Repo with Remote

pulls changes from a remote & merges into a local master

$ git pull

If there are commits on the repository that you don't have but there are also commits on the local repository that the remote one doesn't have either, then use git fetch to prevent an automatic merge of the local branch with the tracking one.

Check remotes

git remote -v

Git Collaboration Completion Screen

Unix Shell

What is the Shell?

The shell is a program that takes commands from the keyboard and gives them to the operating system to perform. In the old days, it was the only user interface available on a Unix-like system such as Linux. On most Linux systems a program called bash (which stands for Bourne Again SHell, an enhanced version of the original Unix shell program, sh, written by Steve Bourne) acts as the shell program.

Unix Shell Course Complete

Below is a list of commands which I found worthy to note here.

List commands with letters "spell"

$ man -k spell

Find files

first argument is where to start search

$ find ~ -name "poem*"

Interesting!

cat is the Linux command which means 'concatenation'.

In fact, many people use cat, rather than more, to display the contents of a file. However, we do not recommend using cat in this way, since it is not nearly as useful as more.

Send command output to a file

To send the output from a command such as cat to a file, use either > or >>.

• > - overwirtes file content
• >> - appends to file content

Standard Input

Many commands can accept input from a facility called standard input. By default, standard input gets its contents from the keyboard, but like standard output, it can be redirected. To redirect standard input from a file instead of the keyboard, the "<" character is used like this:

$ sort < file_list.txt > sorted_file_list.txt

Print two copies of a document to the default printer

$ lpr -# 2 filename

Check the print queue

$ lpq -P <printerName>

Show Disk Space in Home Directory

$ df ~

List All Running Processes

ps aux

Kill Process Immediately

kill -9 PID

Display Path to a Binary to Be Executed with a Command

type code

NodeJS Basics 1

Honestly, I've been struggling to wrap my mind around streams, and I still am. I refuse to say I know something unless I understand all ins and outs of how something works internally.

For example, we had to use the npm through2 package, whereas I tried to solve the problems without it, alas, to no avail. I would really appreciate some more practical tasks to understand/refine my understanding of how streams work.

I also had a hard time with a couple of tasks from the Functional JS Workshop, but I enjoyed solving them. My favorite ones include currying, trampoline, as well as binding Array.prototype.slice to Function.prototype.call. in order to create a function which acts like slice.

NodeJS Basic Courses - Screenshots