Mohamed-Code-309

Data Projection in MongoDB Documents 📊

Table of contents:

1. $project
2. $addFields
3. $set
4. $unset

$project

Mohamed-Code-309

How To Update Array Elements in MongoDB Documents [...]

Table of contents:

1. $set
2. $(update)
3. $[]
4. $[<identifier>] with arrayFilter option

$set

Mohamed-Code-309

How To add and Remove Array Elements in MongoDB Documents [...]

Table of contents:

1. Adding Elements to Array ➕
   1. $push
   2. $each
   3. $position
   4. $slice
   5. $sort
   6. $addToSet

Mohamed-Code-309

How To Query Array Fields in MongoDB Documents [...]

Table of contents:

0. Introduction
1. Find Specific Array Value No Matter Order or Size
2. Find List of Array Values With the Same Order and Size
3. $all : Find List of Array Values With the Same Size
4. $in : Find Arrays Contains At Least One of the Values in the Provided Array
5. $nin : Find Arrays that Does Not contain any of the Values in the Provided Array
6. $elemMatch : Find Arrays Contains At Least One Element that Matches one or more Criteria

Mohamed-Code-309

Characteristics of Distributed Systems 💻

Table of contents:

1. What is a Distributed System ?
2. Characteristics of Distributed Systems
   1. Reliability
   2. Fault Tolerance
   3. Scalability
   4. Maintainability
   5. Extensibility
3. Availability

Mohamed-Code-309

How to Backup and Restore Mongodb Databases 💾

Table of contents:

1. Introduction
2. Mongodb Database Tools
3. mongodump Command
   • List of mongodump Options
4. mongorestore Command
   • List of mongorestore Options
5. bsondump Command

Mohamed-Code-309

Applying KNN algorithm 🤖 to build a recommendation system based on users behavior 🤔🛒

Table of contents:

1. What is K-Nearest Neighbor (KNN) Algorithm
2. Use Case : Recommend the right products to a customer
3. Steps Needed To Implement KNN Algorithm
4. Full Code Demonstration
5. Code Breakdown and Analysis
6. Conclusion

Mohamed-Code-309

Mohamed Jebril Articles (M.J) OR (D.S)

JavaScript

• Create New Array Methods in JavaScript
• Top 13 Javascript Interview Questions You Should Answer!
• Exploring JavaScript's Array Methods: Mutated vs Non-Mutated Methods
• Exploring the Power of map() and reduce() functions in JavaScript (coming soon)
• How to Easily Manipulate and Transpose Arrays of Objects in JavaScript (coming soon)
• Variable Scoping in Javascript (coming soon)
• Looping Methods in Javacript (coming soon)

Mohamed-Code-309

Top 13 Javascript Interview Questions You Should Answer !:scream_cat:

Table of contents:

• Question #1: undefined Vs null
• Question #2: var Vs let Vs const
• Question #3: forEach() vs map()
• Question #4: for...in Vs for...of
• Question #5: find() vs filter()
• Question #6: call() Vs bind() Vs apply()
• Question #7: shallow copy Vs deep copy

Mohamed-Code-309

Exploring JavaScript's Array Methods: Mutated vs Non-Mutated Methods

Table of contents:

• Mutated Methods
  • 🚀 push
  • 💥 pop
  • ⬅️ shift
  • ➡️ unshift
  • 🎨 fill
• 🔀 sort