💙 MongoDB in a Nutshell

Let's explore MongoDB, but in a nutshell.

👇 Image
0️⃣ Introduction

MongoDB is a leading NoSQL document-based database.

Let's explore some basic terminologies. ↓
1️⃣ MongoDB Server

✪ MongoDB Server is a server-side component which can host multiple databases.
2️⃣ MongoDB Database

✪ A MongoDB database is a physical container of collections.
3️⃣ Collections

✪ A collection in MongoDB is equivalent to a relational database table and it exists within a single database.

✪ It includes a group of MongoDB documents.
4️⃣ Documents

✪ Document includes a set of key value pairs.

✪ All documents include a dynamic schema which means documents which comprise of same collection do not need to have same set of fields and structure.

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More from @swapnakpanda

23 Nov
💜 NPM Commands Cheat Sheet

Find reference to some of the most used NPM commands for Nodejs Development.

⇩ Image
There are more commands than listed here. If you want to know about all those commands, NPM has a very nice documentation.

Find reference to all commands here 👇

https://docs[.]npmjs[.]com/cli/v6/commands
1️⃣ npm init Image
Read 8 tweets
22 Nov
💙 Matrix implementation in JavaScript

Let's learn through this 🧵

⇩
0️⃣ Introduction

Matrix is a 2-dimensional Array arrangement of numbers.

Example:
[[a₁₁, a₁₂, a₁₃],
[a₂₁, a₂₂, a₂₃],
[a₃₁, a₃₂, a₃₃]]
✪ Element: Each item in the inner array is called an element of the matrix. Eg, a₁₁

✪ Row: Each item in the main array is called a row. Eg, [a₁₁, a₁₂, a₁₃]

✪ Column: A column is list of items at a specific index from each row in order. Eg, [a₁₁, a₂₁, a₃₁]
Read 18 tweets
21 Nov
DSA - Starter Kit 🚀

⇨ Who should learn?
⇨ Why to learn?
⇨ What should we start with?
⇨ How much is necessary?
⇨ Where to learn?

A comprehensive startup, oops "Starter Kit"

⇩
0️⃣ Let's Talk

✪ What is DSA?
→ DSA stands for "Data Structures and Algorithms"
→ DSA is a subject of study and, practice mostly in "Programming Domain"
→ Unlike popular belief, DSA is not one thing, rather 2 tightly coupled topics.
✪ What is a Data Structure?
A data structure is a way of organising (or, collecting) the data so that it can be used efficiently and effectively.

✪ What is an Algorithm?
An algorithm is a set of instructions for solving a problem or accomplishing a task.
Read 17 tweets
20 Nov
JavaScript Arrays[] Interview Questions 💙

⇩
Before proceeding, do check the previous one of this series 👇

Disclaimer:

• The questions covered here are mostly conceptual
• I do not claim only these type of questions are/should be asked during interviews
• For interviews, you should have fundamentals strong. And you should be able to provide solutions to practical problems.
Read 19 tweets
18 Nov
SQL Interview Questions (S3)

⇩
This is the 3rd one in this series. Check the 2nd one 👇

Disclaimer:

• The questions covered here are mostly conceptual
• I never claim only these type of questions are/should be asked during interviews
• For interviews, you should have fundamentals strong. And you should be able to provide solutions to practical problems.
Read 16 tweets
14 Nov
📚 Books you must read for

⇨ DSA
⇨ SQL
⇨ JavaScript

⇩
Books were and still are the most important medium for our knowledge growth.

Do you love to read books? How about for technical subjects? If no, I would suggest you should.

Here, I will list few of my favourite ones. If you want to add any, feel free.
1️⃣ DSA

1️⃣ Grokking Algorithms
Author: Aditya Bhargava

2️⃣ Introduction to Algorithms
Authors: Thomas H. Cormen, Charles E. Leiserson, Ronald L. Rivest, and Clifford Stein

3️⃣ Introduction to Algorithms
Author: Udi Manber

4️⃣ The Algorithm Design Manual
Author: Steven S. Skiena
Read 11 tweets

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