DEV Community: Ranjit Odedra

Getting Started with CircleCI

Ranjit Odedra — Thu, 23 Mar 2023 13:59:11 +0000

CircleCI is a CI/CD platform that assists software development teams in automating their build, test, and deployment processes. It has an easy-to-use interface and supports a number of programming languages, including Python, Java, Ruby, and Node.js. This article will introduce CircleCI to beginners and walk you through the process of creating your first project.

What is CircleCI?

CircleCI is a cloud-based CI/CD platform that helps development teams automate their build, test, and deployment processes. With CircleCI, you can build, test, and deploy your code automatically every time you push a change to your repository. This helps to catch errors early in the development process, and ensures that your code is always ready to be deployed.

CircleCI offers a variety of features, including:

A wide range of programming languages and frameworks are supported. Integration with well-known version control systems such as GitHub and Bitbucket.
An easy to use interface that makes it simple to set up and manage your projects.
Automated testing and deployment, so you can catch errors early and deploy your code with confidence.
Scalability, so you can easily add more resources as your project grows.
To get started with CircleCI, you will need to create an account and set up a project.

Steps to Get Started

Create an account

To create an account, go to the CircleCI website and click the "Sign Up" button. You can sign up using your GitHub, Bitbucket, or GitLab account.

Create a project

Once you have created an account, you can create a new project by clicking the "Add Projects" button on the dashboard. Select the repository that you want to use, and follow the instructions to set up the project.

Set up your first build

To set up your first build, you will need to add a CircleCI configuration file to your repository. This file should be named ".circleci/config.yml" and should contain the instructions for CircleCI to build, test, and deploy your code.

Configure your project

After you have created your project, you will need to configure it. CircleCI uses a YAML configuration file to define the build, test, and deployment process for your project. You can create this file manually or use one of the pre-built templates provided by CircleCI.

Here is an example configuration file for a Python project

version: 2
jobs:
  build:
    docker:
      - image: python:3.7
    steps:
      - checkout
      - run: pip install -r requirements.txt
      - run: pytest

This configuration file tells CircleCI to use the Python 3.7 Docker image, install the project's dependencies using pip, and run the project's tests using pytest.

To add this configuration file to your repository, create a new file named ".circleci/config.yml" and paste the contents of the configuration file into it. Commit this file to your repository and push the changes to GitHub, Bitbucket, or GitLab.

Once you have added the configuration file to your repository, CircleCI will automatically detect it and start building your project. You can monitor the progress of your build on the CircleCI dashboard.

Why CircleCI over Jenkins

Simplicity: CircleCI is a cloud-based service that is easy to set up and use, while Jenkins requires more configuration and maintenance.
Speed: CircleCI can often run builds faster than Jenkins, especially when using its machine executor or Docker layer caching.
Scalability: CircleCI can automatically scale up or down to handle varying workload demands, while Jenkins requires manual configuration to add or remove worker nodes.
Security: CircleCI provides built-in security features such as automatic container scanning, which Jenkins requires additional plugins and configuration to achieve.
Integration: CircleCI has seamless integration with GitHub, Bitbucket, and other version control systems, making it easier to set up and use with your existing workflow.

Conclusion

CircleCI is a powerful CI/CD platform that can help your development team automate your build, test, and deployment processes. With support for a wide range of programming languages and frameworks, and integration with popular version control systems, CircleCI makes it easy to get started with continuous integration and deployment.

References

https://medium.com/hackernoon/continuous-integration-circleci-vs-travis-ci-vs-jenkins-41a1c2bd95f5

https://medium.com/better-programming/how-to-setup-continuous-integration-ci-with-react-circleci-and-github-e0efd5040b03

Author's

The article is written by
Ranjit Odedra and Priya Makadia — Student's at Charotar University of Science and technology.

CRUD Operation in MongoDB

Ranjit Odedra — Mon, 14 Nov 2022 09:56:50 +0000

Base Notes

table → collections

row → documents

column → fields

Base Commands

start mongodb → mongo

show dbs → to show data bases

use newdb → if db is not present then create it otherwise use it

db → give active database

Create

insertOne()

db.collectionname.insertOne({name:”ReactJS”,type:”frontend”,videos:80,active:true}) → it create colleection of collectionname and create document

insertMany()

db.collectionname.insertMany([{ name:”ReactJS”,type:”frontend”,videos:80,active:true},{name:”ReactJS”,type:”frontend”,videos:80,active:true}])show collections → gives all collections in dbdb.collectionname.find() → gives all documents of the collectionname

db.collectionname.find().pretty() → give documents of collectionname in a good format

Read

find()

db.collection.find({queary,projection}) → for read

db.collection.find({name:”physics”},{_id:0,name:1}) → it will print name of having name as physics

limit()

db.collection.find({name:”physics”},{_id:0,name:1}).limit(2)-> it will only print first 2

findOne() → gives on document

db.collection.findOne({name:”physics”},{_id:0,name:1})

skip(1)→ it will give from second one

db.collection.find({name:”physics”},{_id:0,name:1}).limit(2).skip(1)

UPDATE

updateOne() ⇒ db.collection.updateOne(,)

db.cone.updateOne({name:"Physics"},{$set:{value:300}}) → update value by 300 of doc having name Physics

updateMany() ⇒ db.collection.updateMany(,)

db.cone.updateMany({name:"Physics"},{$set:{value:300}}) → update value by 300 of docs having name Physics

Delete

deleteMany(criteria)

db.cone.deleteMany({name:"Physics"}) → delete doc having name as Physics

db.cone.deleteMany({}) → delete all docs

Linux Commands

Ranjit Odedra — Tue, 08 Nov 2022 12:59:45 +0000

mkdir → to make a new directory

ls → to print list of all dirctories and files

clear → to clear terminal

whoami → to display the current user

pwd → display the current working directory

cd → to change directory

touch filename.txt → create a empty text file

touch file{1..5}.txt → create 5 empty file

cat > filename.txt → add content to file from terminal

cat filename.txt → print content of file

cat file{1..2}.txt → print content of file1 to file2

cat >> file1.txt → to update content of file

cp file1.txt file2.txt → copy content of file1 into file2

mv file3.txt f3.txt → rename file3 as f3

wc -l file1.txt → print count of lines in file

wc -w file1.txt → print count of words in file

wc -m file1.txt → print count of character in file

cmp file4.txt file5.txt → compare two file byte by byte and tell its identical or not

comm file4.txt file5.txt → gives what is comman in file4 and file5 (also used to find unique)

diff file4.txt file5.txt → give difference between file4 and file5

sort f{1..2}.txt → sort content of f1.txt and f2.txt (alphabetically)

cat f1.txt f2.txt > f3.txt → merge two files f1.txt and f2.txt and copy in to f3.txt

sort f3.txt | uniq -u → remove all dublicates from f3.txt and print (doesn’t affect the original file).

tr a-z A-Z < f1.txt → translate lower case to upper case (doesn’t affect the original file).

sed ‘s/[0-9]*//g’ < f1.txt → remove numeric values from file.

head f3.txt → print first 10 lines from file

tail f3.txt → print last 10 lines from file

more f3.txt → print all things *

less f3.txt → print all things *

grep -w linux < file9.txt → it gives all lines containing linux word (grep linux file9.txt)

grep -n linux < file9.txt → it gives line number with line containing linux word

grep -a --count linux < file9.txt → it gives count of line containing linux word

grep ‘+linux*’ file9.txt → gives the lines which starts from linux word

grep ‘os$’ file9.txt → gives lines which ends with os word

ls -l → gives what permissions files have

ls -l filename→ gives what permissions files have

ls -ld → gives directory permissions

history > workdone.txt → history give all the commands that we just write we can store it text file

w → gives info about all users

Permissions

rwx     rwx     rwx
user    group   other

Note that “r” is for read, “w” is for write, and “x” is for execute

chmod ugo+rwx foldername → to give read, write, and execute to everyone.

chmod a=r foldername → to give only read permission for everyone.

The first character will almost always be either a ‘-‘, which means it’s a file, or a ‘d’, which means it’s a directory.
The next nine characters (rw-r–r–) show the security;
The next column shows the owner of the file. In this case it is me, my userID is “aditya314”.
The next column shows the group owner of the file. In my case I want to give the “aditya314” group of people special access to these files.
The next column shows the size of the file in bytes.
The next column shows the date and time the file was last modified.
And, of course, the final column gives the filename.

chmod 755 file.txt → to change permissions of file

chmod 555 ce → change permission of directory

new permission will be -rwxr-xr-x

id → gives information about current user and groups and other info

$HOME → gives path of home.

$PATH → also give path

sudo su → become root user

head -5 file.txt → print first five lines

tail -2 file.txt → print last two lines

rm file.txt → remove file

rm -r directory_name → remove dirctory

sudo adduser username → adds a new user

sudo addgroup g1 → adds new group

sudo groupadd -g 10000 groupname → create group

cat /etc/group → display all the groups

sudo usermod -aG groupname username → add user to a group

sudo chown username filename → to change username

sudo chown username:groupname filename`→ change group name

sudo chgrp groupname filename → change groupname

sudo chgr groupname directoryname → change groupname

umask → display current value of shells mask

umask 531 → set umask

top → display all processes

ps → give all process associated with current user

ps aux → list down all the processes associated with their terminal and states

ps l →

ps lx →

kill -l → display all names and number of available signal

How To Contribute in Hacktoberfest

Ranjit Odedra — Mon, 03 Oct 2022 13:28:25 +0000

follow the steps to make a contribution

I considered that you already registered to hacktoberfest
if note click HERE

before you start working on any issue you have to ask owner of that repo that I am work on this particular issue.

then maintainer will assign you that task

1. Fork The repo for first contribution

for your 2nd , 3rd and 4th contribution each time you have to sync changes instead of fork

2. Clone Repo to your PC

write this command in your terminal

git clone https://github.com/<your-username>/trendit.git

for your 2nd , 3rd and 4th contribution each time you have to pull instead of clone

git pull

3. Make changes that mentioned in issue

4. push to you github account

Add all files

git add .

Commit and provide message about what you did

git commit -m "message about what you did"

push the code

git push origin main

if you get any error in this steps then search in Stackoverflow
Hopefully you will find solution.

5. make pull request from your repo

6. check in Hacktoberfest site

after your pull request is merged you will this timer in hacktoberfest website

after seven days your pull request will be count

Now you are ready to get your goodies
be in first 40000

follow - @ranjitodedra

All about Hecktoberfest

Ranjit Odedra — Mon, 03 Oct 2022 11:39:08 +0000

What is Hacktoberfest ?

it is an event that yearly organized by Digitalocean to to encourage people to contribute to open source.

What is Open Source ?

Open source software is software with source code that anyone can inspect, modify, and enhance.

Why I should participate in Hacktoberfest ?

By participating in Hacktoberfest you will learn about Git and GitHub.
you will opportunity to interact with people of different countries
you will get goodies

Criteria

Have 4 pull/merge requests accepted between October 1 and October 31 to complete Hacktoberfest
The first 40,000 participants (maintainers and contributors) who complete Hacktoberfest can elect to receive one of two prizes: a tree planted in their name, or the Hacktoberfest 2022 t-shirt.

follow me on github I am maintainer of two repo where you can contact me
@ranjitodedra

Basics of Graph

Ranjit Odedra — Sun, 02 Oct 2022 17:14:47 +0000

Basics of Graph

Graph is data structure it has two componets

vertex / node
edge

Type of Graph

Undirect

degree(1) = 2 ← no of connected edges

degree(2) = 3

Total Number of edges in Undirect graph = 2 * E

(where E = Number of edges)

Path

sequence of node without reapeting or revisiting any node.

ex

1 3 2

1 5

❌1 3 2 3 → invalid can’t revisit

Undirected acyclic graph

Directed

Indegree(2) = 2 ← number of incoming edges

Outdegree(2) = 2 ← number of outgoing edges

Path

Qwe can move 1 to 5 and 5 to 4
similarly 1 to 2 and 2 to 3
but we can not move from 5 to 1

suppose if 2 to 1 is not there then we can call this Directed Acyclic Graph (DAG)

Representation of Graph

adjacency matrix

→ when two node are connected put 1 at their position

adjacency list

→ write name of name and name of other connected nodes

Example

Graph

Adjacency Matrix

Adjacency List

If edges are having some weights then

weighted undirected graph

if weight is not given if still you need then you can consider it as 1

weighted directed graph

Traversal in Graph

DFS - Depth First Search

→ Take one node and search all child until you reach leaf node still if dont find then comeback one step

BFS - Breadth First Search

→ First Search all childs then grandchild then again child of grand childs

How Internet works ?

Ranjit Odedra — Sun, 02 Oct 2022 07:46:06 +0000

In simple word

Internet is conections of computer. where one computer can ask for data of another computer. all the computer of world are connected throught optical fiber cable. where data is converted to analog signal then that optical fiber cable get connected to a router that convert it in to digital or electromegnetic signal.

mostly this optical fiber cable are connected whith you ISP (Internet Service Provider) ex. Jio,BSNL.

from there router they convert it in to electromegnetic signals.

lets take example of youtube video

A youtube videos is stored in Data center of Google. In data center it stored in server which also a computer having SSD (Solid State Drive) inside it where data is stored.

it is possible that more then one web site are stored in one server then we can differentiate them by host header. sometimes it also happanes that entire data center is alloted one webite like google,fb.

every digital device in this world have unique IP address including your phone and server of google.

IP → Internet Protocol

IP address is like your post address from they companies located where they have send data. and from where.

your video is sended you in binary formate . and in small packets example 6 bits in each packet all this packet will be sended to use they all might arive from different routes . according to most efficient path any perticular package at that time.

when a package i arived to router that it get reassemble. suppose any packet is lost they response is sended to server and again that part is sended.

for wesite first its load html , css , js , then your video…

so thats how you watch your video.