The output is 2. This is because the
console.log call inside the body of function2 refers to the variable x defined inside the scope of function2 and not the x defined in the outer scope.Guys be active on the community. Show some response. If you really want to learn always try to engage with the posts. It motivates me to post here. I don't wanna put ads here or whatever crap. This community is made by me from scratch to help my fellow aspiring developers.
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10 websites that can replace hundreds of dollars worth of PC software (for free)
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1. Photopea
Replace Adobe Photoshop and Illustrator with this free app (save $46/m).
Photopea is a web-based photo and graphics editor that you can use for image editing, creating illustrations, web design, or converting between various image formats.
photopea.com
Replace Adobe Photoshop and Illustrator with this free app (save $46/m).
Photopea is a web-based photo and graphics editor that you can use for image editing, creating illustrations, web design, or converting between various image formats.
photopea.com
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2. Google Docs, Sheets, Slides
Say goodbye to expensive Microsoft Office.
MS Word → Google Docs
MS Excell → Google Sheets
MS Powerpoint → Google Slides
google.com/docs/about
Say goodbye to expensive Microsoft Office.
MS Word → Google Docs
MS Excell → Google Sheets
MS Powerpoint → Google Slides
google.com/docs/about
Google Workspace
Google Docs: Online Document & PDF Editor | Google Workspace
Create online documents and edit PDFs with Google Docs. Collaborate in real-time from any device and use AI to generate drafts, templates, and more.
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3. Ezgif
I'm surprised how very few people know about his website. There are so many useful features:
• Video to GIF
• Image converter
• Image optimizer
• Resize, rotate, crop, cut, split, you name it!
ezgif.com
I'm surprised how very few people know about his website. There are so many useful features:
• Video to GIF
• Image converter
• Image optimizer
• Resize, rotate, crop, cut, split, you name it!
ezgif.com
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4. PDF Escape
Best alternative to using Adobe Acrobat.
Edit PDF documents, fill PDF forms, and view PDFs online using PDFescape.
pdfescape.com
Best alternative to using Adobe Acrobat.
Edit PDF documents, fill PDF forms, and view PDFs online using PDFescape.
pdfescape.com
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5. Online Convert
Convert media files online from one format into another. The website supports over 50 formats.
All you have to do is select the format you want to convert to, upload your file, and download the converted version once it is complete.
online-convert.com
Convert media files online from one format into another. The website supports over 50 formats.
All you have to do is select the format you want to convert to, upload your file, and download the converted version once it is complete.
online-convert.com
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6. Silex
Free and open source no-code website builder. Silex has all the features makers and designers can expect.
A great alternative to paid website builders like Webflow!
silex.me
Free and open source no-code website builder. Silex has all the features makers and designers can expect.
A great alternative to paid website builders like Webflow!
silex.me
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7. VirusTotal
Free online virus checker.
Analyze suspicious files, domains, IPs and URLs to detect malware and other breaches.
virustotal.com/gui/home/upload
Free online virus checker.
Analyze suspicious files, domains, IPs and URLs to detect malware and other breaches.
virustotal.com/gui/home/upload
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8. TinyWow
TinyWow provides a wide range of free tools, including AI Writing, PDF editing, image and video editing tools.
TinyWow is 100% free to use (even OCR), with no pesky registration required.
tinywow.com
TinyWow provides a wide range of free tools, including AI Writing, PDF editing, image and video editing tools.
TinyWow is 100% free to use (even OCR), with no pesky registration required.
tinywow.com
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9. VidMix
Free online video editor.
Basic editor but it does quick edits for me perfectly. No sign up required.
vidmix.app
Free online video editor.
Basic editor but it does quick edits for me perfectly. No sign up required.
vidmix.app
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10. RemoveBG
Remove the background from any image with just a few clicks.
No need to spend 2 hours in Photoshop.
remove.bg
Remove the background from any image with just a few clicks.
No need to spend 2 hours in Photoshop.
remove.bg
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You're in a web developer internship interview.
The interviewer asked:
"What are the key differences between GET and POST HTTP methods in web development?"
How would you answer? Here's how :👇👇
Key Differences Between GET and POST HTTP Methods in Web Development
1/ Purpose
GET: Retrieve data, no server-side impact.
POST: Submit data, may affect the server.
2/ Data Transmission
GET: Data in URL (query params).
POST: Data in request body (not visible)
.3/ Caching
GET: Cacheable for performance.
POST: Not cacheable, potential side effects.
4/ Bookmarks and Back Button
GET: Bookmarkable, back button friendly.
POST: Not bookmarkable, avoid back button.
5/ Security
GET: Less secure, data in URL.
POST: More secure, data hidden in body.
The interviewer asked:
"What are the key differences between GET and POST HTTP methods in web development?"
How would you answer? Here's how :👇👇
Key Differences Between GET and POST HTTP Methods in Web Development
1/ Purpose
GET: Retrieve data, no server-side impact.
POST: Submit data, may affect the server.
2/ Data Transmission
GET: Data in URL (query params).
POST: Data in request body (not visible)
.3/ Caching
GET: Cacheable for performance.
POST: Not cacheable, potential side effects.
4/ Bookmarks and Back Button
GET: Bookmarkable, back button friendly.
POST: Not bookmarkable, avoid back button.
5/ Security
GET: Less secure, data in URL.
POST: More secure, data hidden in body.
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12 types of Databases and when to use them:
1) Relational Databases (SQL):
- Use when your data is structured and consistent.
- Supports ACID transactions and complex queries.
- Examples: MySQL, PostgreSQL, Oracle.
2) Key-Value Store:
- Use when data model is based on key-value pairs and requires high scalability and availability.
- Provides lightning-fast data retrieval and high throughput.
- Examples: Aerospike, DynamoDB
3) Document Databases:
- Handles semi-structured data with varying fields.
- Provides schema flexibility and horizontal scaling.
- Examples: MongoDB, Couchbase
4) Graph Databases:
- Perfect for data with complex relationships.
- Used in applications like social networks and recommendation engines.
- Examples: Neo4j, Amazon Neptune.
5) Columnar Databases:
- Data is stored by columns instead of rows to optimize reading from a column.
- Great for applications that involve storing massive data sets and running analytical queries.
- Examples: HBase, Redshift.
6) In-Memory Databases:
- When speed is of the essence, and you can afford to sacrifice persistence.
- Ideal for caching, real-time analytics, and high-frequency trading.
- Redis and Memcached are popular choices.
6) In-Memory Databases:
- When speed is of the essence, and you can afford to sacrifice persistence.
- Ideal for caching, real-time analytics, and high-frequency trading.
- Redis and Memcached are popular choices.
7) Time-Series Databases:
- Opt for this when dealing with time-series data like IoT sensor readings or server logs.
- Great for efficient storage and retrieval of time-stamped data.
- Examples: InfluxDB, Prometheus.
8) Wide-Column Stores:
- Use in applications with large volumes of data and high write throughput.
- Best suited for analytical workloads.
- Apache Cassandra is a prominent example.
9) Search Engines:
- When your primary use case revolves around full-text search.
- Essential for applications that require searching of data content.
- Elasticsearch and Solr are popular choices.
10) Spatial Databases:
- Used to store geographical and location-based data.
- Choose for applications that require Spatial indexing, geospatial analytics.
- Examples include PostGIS, CartoDB
11) Blob Datastore:
- Use in applications that requires storing large documents, images, audio and video files.
- Provides high availability, durability and cost effective storage.
- Examples include HDFS, Amazon S3
12) Ledger Databases:
- Used for maintaining a transparent, immutable, and cryptographically verifiable transaction log.
- Useful for applications dealing with financial transactions and supply chain systems
- Examples: Amazon QLDB, Azure SQL Ledger
There's no one-size-fits-all solution.
The choice of a database depends on your specific use case, data model, scalability needs, and budget
1) Relational Databases (SQL):
- Use when your data is structured and consistent.
- Supports ACID transactions and complex queries.
- Examples: MySQL, PostgreSQL, Oracle.
2) Key-Value Store:
- Use when data model is based on key-value pairs and requires high scalability and availability.
- Provides lightning-fast data retrieval and high throughput.
- Examples: Aerospike, DynamoDB
3) Document Databases:
- Handles semi-structured data with varying fields.
- Provides schema flexibility and horizontal scaling.
- Examples: MongoDB, Couchbase
4) Graph Databases:
- Perfect for data with complex relationships.
- Used in applications like social networks and recommendation engines.
- Examples: Neo4j, Amazon Neptune.
5) Columnar Databases:
- Data is stored by columns instead of rows to optimize reading from a column.
- Great for applications that involve storing massive data sets and running analytical queries.
- Examples: HBase, Redshift.
6) In-Memory Databases:
- When speed is of the essence, and you can afford to sacrifice persistence.
- Ideal for caching, real-time analytics, and high-frequency trading.
- Redis and Memcached are popular choices.
6) In-Memory Databases:
- When speed is of the essence, and you can afford to sacrifice persistence.
- Ideal for caching, real-time analytics, and high-frequency trading.
- Redis and Memcached are popular choices.
7) Time-Series Databases:
- Opt for this when dealing with time-series data like IoT sensor readings or server logs.
- Great for efficient storage and retrieval of time-stamped data.
- Examples: InfluxDB, Prometheus.
8) Wide-Column Stores:
- Use in applications with large volumes of data and high write throughput.
- Best suited for analytical workloads.
- Apache Cassandra is a prominent example.
9) Search Engines:
- When your primary use case revolves around full-text search.
- Essential for applications that require searching of data content.
- Elasticsearch and Solr are popular choices.
10) Spatial Databases:
- Used to store geographical and location-based data.
- Choose for applications that require Spatial indexing, geospatial analytics.
- Examples include PostGIS, CartoDB
11) Blob Datastore:
- Use in applications that requires storing large documents, images, audio and video files.
- Provides high availability, durability and cost effective storage.
- Examples include HDFS, Amazon S3
12) Ledger Databases:
- Used for maintaining a transparent, immutable, and cryptographically verifiable transaction log.
- Useful for applications dealing with financial transactions and supply chain systems
- Examples: Amazon QLDB, Azure SQL Ledger
There's no one-size-fits-all solution.
The choice of a database depends on your specific use case, data model, scalability needs, and budget
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Websites to practice programming:
1. LeetCode
leetcode.com
2. HackerRank
hackerrank.com
3. Codewars
codewars.com
4. CodinGame
codingame.com
5. CSSBattle
cssbattle.dev
6. Coding Challenges
codingchallenges.fyi
1. LeetCode
leetcode.com
2. HackerRank
hackerrank.com
3. Codewars
codewars.com
4. CodinGame
codingame.com
5. CSSBattle
cssbattle.dev
6. Coding Challenges
codingchallenges.fyi
This javascript question is a bit advanced. If you get it correctly without thinking twice, you are a PRO🫡.
Hint: mapping over an array
#programming
Hint: mapping over an array
#programming