π Complete Guide to All JavaScript Concepts (A-Z): Basic to Advanced
π 8 min read
π 8 min read
π Comprehensive Guide covering all essential JavaScript concepts, from basic to advanced. Topics include:
π€ Basics:
π Variables
π Data Types
π Control Structures
π Loops
π§ Functions
β³ Asynchronous Programming:
π Promises
β‘οΈ Async/Await
π Callbacks
π© Advanced JavaScript Magic:
π Closures
π Scope
π Hoisting
π§ Execution Context
π JavaScript Engine Insights:
β° Event Loop
π Task Queue
π‘ Advanced Concepts:
π§ Memoization
π Debouncing
π¦ Throttling
π€Ή Currying
π¨βπ©βπ§βπ¦ Prototypal Inheritance
π DOM Manipulation:
πΌ Accessing and Modifying the DOM
π Design Patterns:
π Singleton
π΅οΈ Observer
π Factory
This guide ensures you're prepared for every level of JavaScript mastery! π
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Telegraph
Complete Guide to All Javascript Concepts (A-Z): Basic to Advanced
1. Variables & Data Types Variable Declarations: var, let, const Primitive Data Types:string, number, boolean, null, undefined, symbol 2. Null vs Undefined null: Explicitly assigned to indicate an empty or non-existent value. Type: object (a historical quirkβ¦
Forwarded from Telegram Contests
Prize fund: $50,000
Deadline: 23:59 on December 21st (Dubai time)
Who can participate: Everyone, even if you didn't join Round 1
Results: December 2024
Telegram is hosting a contest for Android developers to enhance and upgrade the in-chat camera.
THE TASK
Adapt the existing in-chat camera with the camera for Stories, including all its features:
β Collages;
β Dual Camera Mode;
β Front Camera Flash;
β Widgets (for interactive widgets, i.e., reactions or links, your app may just apply a non-interactive entity over the canvas)...
Your implementation must remove any story-related restrictions or controls. Specifically, your app must not impose a limit on video length and should exclude interface controls that are only relevant for stories. Your app must retain the existing in-chat camera interface and flow before user opens the camera (i.e., the preview within the attachment menu).
Contest Requirements:
General
β Your app must provide a consistent and smooth recording experience that aligns with the device's native camera app.
β No third-party UI frameworks are allowed.
β The submission must be consistent with the existing Telegram for Android codebase.
β The app's stability and performance must not be affected with the changes you made.
β The app must be free of significant flaws (including crashes, visual glitches, noticeable element blinking, layout errors, and more).
Note:
Submissions that introduce improvements to video recording are likely to receive higher scores in this contest.
Evaluation:
During the evaluation stage, we will review your code and test the submission on a wide range of Android devices.
Winners may be offered a chance to join the
Submissions:
Contestants will be able to submit their entries to @ContestBot at a later date. We will further clarify the submission instructions closer to the deadline.
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What's the output for the above code ?
Anonymous Quiz
8%
false false
32%
false true
24%
true false
22%
true true
14%
compilation error
π1
π Choosing the Right Tech Role! π
π 5m read time
π 5m read time
π€ Product Managers: Focus on WHAT to do. They define the vision and roadmap. πΊ
π Technical Leads: Focus on HOW to do it. They architect solutions and guide the team technically. π§
π Engineering Managers: Focus on EXECUTION. They lead teams, manage projects, and ensure delivery. β
β¨ Career paths differ:
π§βπ» More Individual Contributor roles at junior levels.
π©βπΌ Managerial growth as you climb the ladder.
π― Skills you need for growth:
π£ Strong communication.
π Leadership abilities.
π« Navigating ambiguity like a pro.
π Your career direction depends on your strengths, interests, and organizational needs! Which path excites you the most? π
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Telegraph
Finding Your Fit: Tech Roles for Growth and Impact
These are real questions I have been asked to weigh in on, and this article attempts to solidify my thoughts on this topic.
π1
class Person {
private String name;
private Address address; // Address object stored privately
public Person(String name, Address address) {
this.name = name;
this.address = new address; // indirect assignment of the object I.e copy
}
public String getName() { //getter method for the name
return name;
}
public Address getAddress() { //getter method for the Address
return address;
}
}
#Friday #quiz
π1
WHAT'S WRONG WITH THE ABOVE CODE
Anonymous Quiz
27%
Logical Error
14%
Memory leak
18%
CompileTime error
22%
Privacy leak
18%
None
π Why Is Leetcode So Popular in Big Tech Interviews? π»
π 4 Min read time
π 4 Min read time
Leetcode is popular in big tech interviews because it efficiently filters thousands of applicants in a short time β³. While not perfect, alternatives are often too time-consuming or unreliable π«.
β Meritocratic & scalable
β Alternatives face scalability issues
Big tech will likely stick with Leetcode, while smaller companies may lean towards practical interviews π Show_More
Telegraph
Why Leetcode Is So Popular
Ever wondered why coding interviews at companies like Google, Amazon, and Facebook revolve around algorithm puzzles on Leetcode? Itβs not because software engineers spend their days solving binary tree problemsβitβs because these companies face an overwhelmingβ¦
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Interesting topic about Javascript π€
π€£2
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This media is not supported in your browser
VIEW IN TELEGRAM
Meet the Enron Egg: a satirical take on innovation, claiming to be the worldβs first 'at-home' nuclear reactor. Designed to power your home for up to 10 years, this parody product promises clean energy in a compact, egg-shaped device. While itβs purely fictional, the idea has sparked conversations about the future of personal energy solutions. Could this be the start of a new era, or just a clever joke?
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π Best of CES 2025! π
π Full highlights on YouTube: Watch here
#CES2025 #TechInnovation #ForCoder
Discover the tech revolution from Las Vegas πβ¨. AI breakthroughs π€, futuristic EVs πβ‘, paper batteries π, and even a salt-tasting electric spoon π₯!
Catch all the winners, from NVIDIA Cosmos AI π to LG's dazzling OLED TV πΊ and more.
Obviously it's a bucket list for me to go therebecause αα α΄αα΅ yehonu stuffs alu
π Full highlights on YouTube: Watch here
#CES2025 #TechInnovation #ForCoder
YouTube
Best of CES 2025
CNET's Bridget Carey reveals the Best of CES winners from CNET, PCMag, ZDNet, Lifehacker and Mashable. See who won in every category from Mobile to Sustainability.
Read more on CNET.com
These Are the Official 2025 Best of CES Winners, Awarded by CNET Groupβ¦
Read more on CNET.com
These Are the Official 2025 Best of CES Winners, Awarded by CNET Groupβ¦
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β€3
π "First do it. Then do it right. Then do it better."
This quote from the last Next.js conference really resonated with me.
Itβs a powerful reminder that the biggest hurdle we often face is simply starting, especially when we feel like we donβt fully understand what lies ahead.
Hereβs the truth: Growth begins with action. Itβs not about getting it perfect on the first tryβitβs about taking that initial step, learning along the way, and refining with each iteration.
This approach applies to everything in lifeβlearning a skill, starting a project, or pursuing a passion. Itβs a mindset that encourages growth, resilience, and progress over perfection.
π‘ Takeaway: Donβt wait for perfect conditions. Start now. Learn. Improve. Repeat.
Letβs embrace this life framework and unlock new possibilities. π
#GrowthMindset #Nextjs #KeepImproving #ProgressOverPerfection
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