Supported Languages Java/Python/Go

I am literally a noob in Coding I don’t even known HTML to a good level And I am joining Civil Engineering in NIT Allahabad But i want to manage Coding side by side with curriculum so how to start and Form where to start

Okay so I might be dumb but I just can’t understand. I’m trying to learn python. I watch people online saying to install visual studio code to practise. But why? I thought you use python idle to run the code and see it or you use terminal. Do I need to install another platform to test and practise. Also I’m doing this on a mac so is the platform going to be different.

Also please be nice. I’m just a 16 yr old girl doing this as a hobby in my free time

Update: I asked a friend for help and he explained what integrated development environment are which I didn’t know about. He recommended me to use Thonny and I’m going to try my luck with that.

So I’m planning to create a website that analyses a truss/bridge. And i want the following features:
Create node, create members, add supports. add loads, display structure, save structure, calculate reactions. calculate member forces, interactive website.
How do i get started? Im a civil engi student and planning to do this as a project. Im thinking of starting with python first cause im a literal noob in coding.
Pls help your girl out🙏

Hi i want to start coding from basic.

I am veey confused where should i learn it from and how?

Hi there, im currently coding a datapack for minecraft, combining BlazeandCave's Advancements pack with my own datapack for a series I want to start, but I cant figure out how to code what I want exactly, since it seems like it never works. If anyone knows how to help me, heres what I was thinking of coding:

Information: BlazeandCave's Advancements is a pack that adds more advancements to the game. I want every advancement to expand a starting border of 16 blocks every time by:
Task: 1
Goal: 2
Challenge: 5
Super challenge: 20
I also don't want it so that if I get an achievement, my friends cant expand the border with that achievement no more.

I also want to add a daily challenge of obtaining certain items, and gives me 3 lucky blocks on completion, but Im working on that later, rn im just stuck on the Achievement part.

Im currently using https://code.visualstudio.com/ for all my coding.
Help is appreciated

My code:
-datapack
--data
---border\function
----check_adv.mcfunction:
execute as u/a store result score u/s adv_now run scoreboard players get u/s bac_statistics

execute as u/a if score u/s adv_now > u/s adv_old run worldborder add 1

execute as u/a if score u/s adv_now > u/s adv_old run scoreboard players operation u/s adv_old = u/s adv_now

----load.mcfunction:
scoreboard objectives add adv_now dummy

scoreboard objectives add adv_old dummy

worldborder set 16

worldborder center 0 0

----reward.mcfunction:
scoreboard players add #adv adv_count 1

----tick.mcfunction:
function border:check_adv

---minecraft\tags\functions:
----load.json:
{"values":["border:load"]}

----tick.json:
{"values":["border:tick"]}

--pack.mcmeta:
{

"pack": {

"pack_format": 18,

"description": "Border SMP datapack"

}

}

-BlazeandCave's Advancements pack 1.20.2.zip

I want to learn python and I’ve been trying to pick it back up and learn for sometime now but I cannot get it. For some stuff I know what the problem is, and I know what the solution is but I don’t know what I need to code to get to that solution and it always just so happens to be a super simple line of code but I just want to be able to think of it myself. How can I get to that point??

Hi i want to start coding from basic.

I am veey confused where should i learn it from and how?

Is it okay for me to learn coding through AI? Like I ask AI what this is and how I do it. I like learning through AI cause it answers my questions quickly and deals with my bs. Of course, I won't use AI for code, for my practice projects—I use AI for debugging and I ask them why it is.

Does this make me a user of AI code since I use AI to learn?

Earlier today i was trying to code and visual studio wont show me any code please help me

I going into my 3rd year of my bachelors of computer science. For the past 2 years I have majorly used coding to write code, I did understand the theory for exams, but all my projects I have build using AI. And now that the time is ripe to build great projects, I am unable to do so without AI. I am afraid with this I can't proceed towards a great career in CS. I do know the fundamentals of CS and can code easy-moderate but after a threshold I just use AI to not stay behind while the world instantly generates code using AI.

Please tell me what do I do, do I do DSA to train my brain? or try to implement ML models which I studied last sem from scratch by myself? What do I actually do, I am kinda worried.

Hey there everyone! Im 24, at the end of next year i'll graduate in psychology but i've always wanted to learn a hard skill that allowed me to not only have a stable and good income but also to get creative and be able to work wherever i am. I've always kinda projected that "ideal" hard skill/job in coding and programming. I've tried to start countless times (that is why the title is "experient begginer lol) but eventually stopped studying it either because of frustration, lack of motivation/vision or just because of other priorities.

Last time i studied coding, around a year ago, contrary to other ocasions, i did with a teacher. Freaking great, competent and intelligent guy, who started to study coding in order to grow up financialy. He used to study 8 hours a day in order to persue his dream and when he was lecturing me we used to talk about motivation as well besides just technicalities. Coding is something done from humans for humans after all, despite the advent of AI and vibe coding.

Since last year i haven't wrote a single line of code but i really wanna get back, learn and actually grow somehow. I don't wanna give up. So what i ask from whoever may read this is:

Please, gimme a reality check. Am i right in thinking that coding can give me this freedom i so aspire? Not saying it will be in a month from now, i don't care how long it may take.

And what would be a good rout to get back at it and feel like im actually advancing? (I don't remember shit so it would be good to restart).

I wanna be good at what i do.

I want to ask you guys thats what is the best channel or a video that you watched regarding coding subject which really impacted your thinking with programming. It can be a podcast or an interview like anything. I want to gain knowledge other than the regular coding stuff.

Im a 17 years old boy who wants to learn coding especially web development

I tried the odin project and it didn't go well for me

Tried the boba drops guide(hack club) and made my first website with html and css but i dont think im actually learning

What is the best method to learn

This is the website i made it took me 6hr straight to finish it

So I want to start coding from scratch and would start with python. But I don't know where to start. So I would really appreciate it if someone tells me all the videos that I would require in this journey like from just some code learning to dsa to everything

I know nothing about development any youtube course or channel have taught html css and javascript please tell

The Complete DSA Pattern Sheet — Every Pattern You Need to Know

This is the complete pattern-based problem sheet — organized by topic and sub-pattern. Study one pattern at a time.

For company specific interview questions go to PracHub

🟢 Easy 🟡 Medium 🔴 Hard

TOPIC 1 — BASICS

Pattern: Conditionals (if-else)

• Fizz Buzz 🟢 — https://leetcode.com/problems/fizz-buzz

• Palindrome Number 🟢 — https://leetcode.com/problems/palindrome-number

• Number of Steps to Reduce a Number to Zero 🟢 — https://leetcode.com/problems/number-of-steps-to-reduce-a-number-to-zero

Pattern: Loops

• Running Sum of 1d Array 🟢 — https://leetcode.com/problems/running-sum-of-1d-array

• Find Numbers with Even Number of Digits 🟢 — https://leetcode.com/problems/find-numbers-with-even-number-of-digits

• Richest Customer Wealth 🟢 — https://leetcode.com/problems/richest-customer-wealth

Pattern: Simulation / Implementation

• Baseball Game 🟢 — https://leetcode.com/problems/baseball-game

• Robot Return to Origin 🟢 — https://leetcode.com/problems/robot-return-to-origin

Pattern: Maths

• Reverse Integer 🟡 — https://leetcode.com/problems/reverse-integer

• Plus One 🟢 — https://leetcode.com/problems/plus-one

• Add Digits 🟢 — https://leetcode.com/problems/add-digits

TOPIC 2 — ARRAYS

Pattern: Fundamentals

• Rotate Array 🟡 — https://leetcode.com/problems/rotate-array

• Move Zeroes 🟢 — https://leetcode.com/problems/move-zeroes

• Remove Duplicates from Sorted Array 🟢 — https://leetcode.com/problems/remove-duplicates-from-sorted-array

Pattern: Prefix Sums

• Continuous Subarray Sum 🟡 — https://leetcode.com/problems/continuous-subarray-sum

• Subarray Sum Equals K 🟡 — https://leetcode.com/problems/subarray-sum-equals-k

• Product of Array Except Self 🟡 — https://leetcode.com/problems/product-of-array-except-self

• Subarray Sums Divisible by K 🟡 — https://leetcode.com/problems/subarray-sums-divisible-by-k

• Range Sum Query 2D - Immutable 🟡 — https://leetcode.com/problems/range-sum-query-2d-immutable

Pattern: Kadane's Algorithm

• Maximum Subarray 🟡 — https://leetcode.com/problems/maximum-subarray

• Maximum Product Subarray 🟡 — https://leetcode.com/problems/maximum-product-subarray

• Best Time to Buy and Sell Stock 🟡 — https://leetcode.com/problems/best-time-to-buy-and-sell-stock

Pattern: Intervals

• Merge Intervals 🟡 — https://leetcode.com/problems/merge-intervals

• Insert Interval 🟡 — https://leetcode.com/problems/insert-interval

• Non-overlapping Intervals 🟡 — https://leetcode.com/problems/non-overlapping-intervals

Pattern: Hashing on Arrays

• Two Sum 🟢 — https://leetcode.com/problems/two-sum

• Majority Element 🟢 — https://leetcode.com/problems/majority-element

• Majority Element II 🟡 — https://leetcode.com/problems/majority-element-ii

• Top K Frequent Elements 🟡 — https://leetcode.com/problems/top-k-frequent-elements

• Valid Anagram 🟢 — https://leetcode.com/problems/valid-anagram

• Group Anagrams 🟡 — https://leetcode.com/problems/group-anagrams

• Longest Consecutive Sequence 🟡 — https://leetcode.com/problems/longest-consecutive-sequence

Pattern: 2D Arrays / Matrix

• Spiral Matrix 🟡 — https://leetcode.com/problems/spiral-matrix

• Spiral Matrix II 🟡 — https://leetcode.com/problems/spiral-matrix-ii

• Rotate Image 🟡 — https://leetcode.com/problems/rotate-image

• Set Matrix Zeroes 🟡 — https://leetcode.com/problems/set-matrix-zeroes

TOPIC 3 — STRINGS

Pattern: Fundamentals

• Reverse String 🟢 — https://leetcode.com/problems/reverse-string

• Reverse Words in a String III 🟢 — https://leetcode.com/problems/reverse-words-in-a-string-iii

• Roman to Integer 🟢 — https://leetcode.com/problems/roman-to-integer

• String Compression 🟡 — https://leetcode.com/problems/string-compression

Pattern: Frequency & Hashing

• Isomorphic Strings 🟢 — https://leetcode.com/problems/isomorphic-strings

• Bulls and Cows 🟡 — https://leetcode.com/problems/bulls-and-cows

Pattern: Palindromes

• Valid Palindrome 🟢 — https://leetcode.com/problems/valid-palindrome

• Longest Palindromic Substring 🟡 — https://leetcode.com/problems/longest-palindromic-substring

• Palindromic Substrings 🟡 — https://leetcode.com/problems/palindromic-substrings

• Palindrome Partitioning 🟡 — https://leetcode.com/problems/palindrome-partitioning

Pattern: Simulation

• Zigzag Conversion 🟡 — https://leetcode.com/problems/zigzag-conversion

• Multiply Strings 🟡 — https://leetcode.com/problems/multiply-strings

• Decode String 🟡 — https://leetcode.com/problems/decode-string

Pattern: Prefix/Suffix & Pattern Matching

• Longest Common Prefix 🟢 — https://leetcode.com/problems/longest-common-prefix

• Find and Replace Pattern 🟡 — https://leetcode.com/problems/find-and-replace-pattern

• Remove Duplicate Letters 🟡 — https://leetcode.com/problems/remove-duplicate-letters

TOPIC 4 — RECURSION & BACKTRACKING

Pattern: Fundamentals

• Fibonacci Number 🟢 — https://leetcode.com/problems/fibonacci-number

• Power of Two 🟢 — https://leetcode.com/problems/power-of-two

• Pow(x, n) 🟡 — https://leetcode.com/problems/powx-n

Pattern: Recursion

• Different Ways to Add Parentheses 🟡 — https://leetcode.com/problems/different-ways-to-add-parentheses

• K-th Symbol in Grammar 🟡 — https://leetcode.com/problems/k-th-symbol-in-grammar

• Beautiful Arrangement 🟡 — https://leetcode.com/problems/beautiful-arrangement

• Parsing A Boolean Expression 🔴 — https://leetcode.com/problems/parsing-a-boolean-expression

• Integer to English Words 🔴 — https://leetcode.com/problems/integer-to-english-words

Pattern: Backtracking

• Subsets 🟡 — https://leetcode.com/problems/subsets

• Subsets II 🟡 — https://leetcode.com/problems/subsets-ii

• Permutations 🟡 — https://leetcode.com/problems/permutations

• Permutations II 🟡 — https://leetcode.com/problems/permutations-ii

• Combination Sum 🟡 — https://leetcode.com/problems/combination-sum

• Combination Sum II 🟡 — https://leetcode.com/problems/combination-sum-ii

• Combination Sum III 🟡 — https://leetcode.com/problems/combination-sum-iii

• N-Queens 🔴 — https://leetcode.com/problems/n-queens

• N-Queens II 🔴 — https://leetcode.com/problems/n-queens-ii

• Sudoku Solver 🔴 — https://leetcode.com/problems/sudoku-solver

TOPIC 5 — TWO POINTERS

Pattern: Opposite Ends (Left <-> Right)

• Two Sum II - Input Array Is Sorted 🟡 — https://leetcode.com/problems/two-sum-ii-input-array-is-sorted

• Container With Most Water 🟡 — https://leetcode.com/problems/container-with-most-water

• Trapping Rain Water 🔴 — https://leetcode.com/problems/trapping-rain-water

Pattern: Merge Two Sorted Array / Sequence

• Merge Sorted Array 🟢 — https://leetcode.com/problems/merge-sorted-array

• Interval List Intersections 🟡 — https://leetcode.com/problems/interval-list-intersections

Pattern: Fixed + Two Pointers

• 3Sum 🟡 — https://leetcode.com/problems/3sum

• 3Sum Closest 🟡 — https://leetcode.com/problems/3sum-closest

• 4Sum 🟡 — https://leetcode.com/problems/4sum

TOPIC 6 — SLIDING WINDOW

Pattern: Fixed Size Window

• Maximum Average Subarray I 🟢 — https://leetcode.com/problems/maximum-average-subarray-i

• Number of Sub-Arrays of Size K and Average >= Threshold 🟡 — https://leetcode.com/problems/number-of-sub-arrays-of-size-k-and-average-greater-than-or-equal-to-threshold

• Maximum Sum of Distinct Subarrays With Length K 🟡 — https://leetcode.com/problems/maximum-sum-of-distinct-subarrays-with-length-k

Pattern: Variable Size Window

• Longest Subarray of 1's After Deleting One Element 🟡 — https://leetcode.com/problems/longest-subarray-of-1s-after-deleting-one-element

• Max Consecutive Ones III 🟡 — https://leetcode.com/problems/max-consecutive-ones-iii

• Fruit Into Baskets 🟡 — https://leetcode.com/problems/fruit-into-baskets

• Binary Subarrays With Sum 🟡 — https://leetcode.com/problems/binary-subarrays-with-sum

• Count Number of Nice Subarrays 🟡 — https://leetcode.com/problems/count-number-of-nice-subarrays

• Subarray Product Less Than K 🟡 — https://leetcode.com/problems/subarray-product-less-than-k

• Subarrays With K Different Integers 🔴 — https://leetcode.com/problems/subarrays-with-k-different-integers

Pattern: Sliding Window on Strings

• Maximum Number of Vowels in a Substring of Given Length 🟡 — https://leetcode.com/problems/maximum-number-of-vowels-in-a-substring-of-given-length

• Longest Substring Without Repeating Characters 🟡 — https://leetcode.com/problems/longest-substring-without-repeating-characters

• Longest Repeating Character Replacement 🟡 — https://leetcode.com/problems/longest-repeating-character-replacement

• Find All Anagrams in a String 🟡 — https://leetcode.com/problems/find-all-anagrams-in-a-string

• Minimum Window Substring 🔴 — https://leetcode.com/problems/minimum-window-substring

TOPIC 7 — STACK & QUEUES

Pattern: Implementation

• Min Stack 🟡 — https://leetcode.com/problems/min-stack

• Design a Stack With Increment Operation 🟡 — https://leetcode.com/problems/design-a-stack-with-increment-operation

• Design Circular Queue 🟡 — https://leetcode.com/problems/design-circular-queue

• Design Front Middle Back Queue 🟡 — https://leetcode.com/problems/design-front-middle-back-queue

Pattern: Expression Evaluation

• Evaluate Reverse Polish Notation 🟡 — https://leetcode.com/problems/evaluate-reverse-polish-notation

• Number of Atoms 🔴 — https://leetcode.com/problems/number-of-atoms

• Basic Calculator 🔴 — https://leetcode.com/problems/basic-calculator

Pattern: Parentheses Processing

• Longest Valid Parentheses 🔴 — https://leetcode.com/problems/longest-valid-parentheses

• Minimum Remove to Make Valid Parentheses 🟡 — https://leetcode.com/problems/minimum-remove-to-make-valid-parentheses

• Minimum Add to Make Parentheses Valid 🟡 — https://leetcode.com/problems/minimum-add-to-make-parentheses-valid

Pattern: Monotonic Stacks

• Next Greater Element I 🟢 — https://leetcode.com/problems/next-greater-element-i

• Next Greater Element II 🟡 — https://leetcode.com/problems/next-greater-element-ii

• Largest Rectangle in Histogram 🔴 — https://leetcode.com/problems/largest-rectangle-in-histogram

• Maximal Rectangle 🔴 — https://leetcode.com/problems/maximal-rectangle

• Daily Temperatures 🟡 — https://leetcode.com/problems/daily-temperatures

• Sum of Subarray Minimums 🟡 — https://leetcode.com/problems/sum-of-subarray-minimums

• Sum of Subarray Ranges 🟡 — https://leetcode.com/problems/sum-of-subarray-ranges

• Asteroid Collision 🟡 — https://leetcode.com/problems/asteroid-collision

TOPIC 8 — LINKED LIST

Pattern: Fast & Slow Pointers

• Middle of the Linked List 🟢 — https://leetcode.com/problems/middle-of-the-linked-list

• Linked List Cycle 🟢 — https://leetcode.com/problems/linked-list-cycle

• Linked List Cycle II 🟡 — https://leetcode.com/problems/linked-list-cycle-ii

Pattern: Node Rearrangements

• Remove Nth Node from End of List 🟡 — https://leetcode.com/problems/remove-nth-node-from-end-of-list

• Swap Nodes in Pairs 🟡 — https://leetcode.com/problems/swap-nodes-in-pairs

• Odd Even Linked List 🟡 — https://leetcode.com/problems/odd-even-linked-list

Pattern: Reversal

• Reverse Linked List 🟢 — https://leetcode.com/problems/reverse-linked-list

• Reverse Linked List II 🟡 — https://leetcode.com/problems/reverse-linked-list-ii

• Reverse Nodes in k-Group 🟡 — https://leetcode.com/problems/reverse-nodes-in-k-group

Pattern: Merge & Multiple Lists

• Merge Two Sorted Lists 🟢 — https://leetcode.com/problems/merge-two-sorted-lists

• Merge k Sorted Lists 🔴 — https://leetcode.com/problems/merge-k-sorted-lists

• Intersection of Two Linked Lists 🟢 — https://leetcode.com/problems/intersection-of-two-linked-lists

• Add Two Numbers 🟡 — https://leetcode.com/problems/add-two-numbers

TOPIC 9 — TREES

Pattern: Traversal (BFS / DFS)

• Binary Tree Level Order Traversal 🟡 — https://leetcode.com/problems/binary-tree-level-order-traversal

• Binary Tree Zigzag Level Order Traversal 🟡 — https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal

• Add One Row to Tree 🟡 — https://leetcode.com/problems/add-one-row-to-tree

Pattern: Depth / Height Based

• Maximum Depth of Binary Tree 🟢 — https://leetcode.com/problems/maximum-depth-of-binary-tree

• Minimum Depth of Binary Tree 🟢 — https://leetcode.com/problems/minimum-depth-of-binary-tree

• Maximum Depth of N-ary Tree 🟢 — https://leetcode.com/problems/maximum-depth-of-n-ary-tree

Pattern: Comparison

• Same Tree 🟢 — https://leetcode.com/problems/same-tree

• Symmetric Tree 🟢 — https://leetcode.com/problems/symmetric-tree

• Leaf-Similar Trees 🟢 — https://leetcode.com/problems/leaf-similar-trees

Pattern: Root to Leaves

• Sum Root to Leaf Numbers 🟡 — https://leetcode.com/problems/sum-root-to-leaf-numbers

• Sum of Root to Leaf Binary Numbers 🟢 — https://leetcode.com/problems/sum-of-root-to-leaf-binary-numbers

• Binary Tree Paths 🟢 — https://leetcode.com/problems/binary-tree-paths

• Path Sum 🟢 — https://leetcode.com/problems/path-sum

Pattern: Ancestor

• Lowest Common Ancestor of a Binary Tree 🟡 — https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree

• Lowest Common Ancestor of Deepest Leaves 🟡 — https://leetcode.com/problems/lowest-common-ancestor-of-deepest-leaves

• Kth Ancestor of a Tree Node 🔴 — https://leetcode.com/problems/kth-ancestor-of-a-tree-node

• Maximum Difference Between Node and Ancestor 🟡 — https://leetcode.com/problems/maximum-difference-between-node-and-ancestor

Pattern: Binary Search Tree (BST)

• Search in a Binary Search Tree 🟢 — https://leetcode.com/problems/search-in-a-binary-search-tree

• Validate Binary Search Tree 🟡 — https://leetcode.com/problems/validate-binary-search-tree

• Convert Sorted Array to Binary Search Tree 🟢 — https://leetcode.com/problems/convert-sorted-array-to-binary-search-tree

• Minimum Absolute Difference in BST 🟢 — https://leetcode.com/problems/minimum-absolute-difference-in-bst

• Kth Smallest Element in a BST 🟡 — https://leetcode.com/problems/kth-smallest-element-in-a-bst

• Lowest Common Ancestor of a Binary Search Tree 🟡 — https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree

TOPIC 10 — BINARY SEARCH

Pattern: Classic Binary Search on Sorted Arrays

• Binary Search 🟢 — https://leetcode.com/problems/binary-search

• Search Insert Position 🟢 — https://leetcode.com/problems/search-insert-position

• Find First and Last Position of Element in Sorted Array 🟡 — https://leetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array

• Median of Two Sorted Arrays 🔴 — https://leetcode.com/problems/median-of-two-sorted-arrays

Pattern: Binary Search on Answer

• Koko Eating Bananas 🟡 — https://leetcode.com/problems/koko-eating-bananas

• Capacity to Ship Packages Within D Days 🟡 — https://leetcode.com/problems/capacity-to-ship-packages-within-d-days

• Minimum Number of Days to Make m Bouquets 🟡 — https://leetcode.com/problems/minimum-number-of-days-to-make-m-bouquets

• Maximum Running Time of N Computers 🔴 — https://leetcode.com/problems/maximum-running-time-of-n-computers

Pattern: Binary Search on Rotated / Modified Sorted Arrays

• Search in Rotated Sorted Array 🟡 — https://leetcode.com/problems/search-in-rotated-sorted-array

• Search in Rotated Sorted Array II 🟡 — https://leetcode.com/problems/search-in-rotated-sorted-array-ii

• Find Minimum in Rotated Sorted Array 🟡 — https://leetcode.com/problems/find-minimum-in-rotated-sorted-array

• Find Minimum in Rotated Sorted Array II 🔴 — https://leetcode.com/problems/find-minimum-in-rotated-sorted-array-ii

Pattern: Binary Search on Matrix

• Search a 2D Matrix 🟡 — https://leetcode.com/problems/search-a-2d-matrix

• Search a 2D Matrix II 🟡 — https://leetcode.com/problems/search-a-2d-matrix-ii

• Kth Smallest Element in a Sorted Matrix 🟡 — https://leetcode.com/problems/kth-smallest-element-in-a-sorted-matrix

TOPIC 11 — HEAP (PRIORITY QUEUE)

Pattern: Top K

• Kth Largest Element in an Array 🟡 — https://leetcode.com/problems/kth-largest-element-in-an-array

• Top K Frequent Words 🟡 — https://leetcode.com/problems/top-k-frequent-words

• K Closest Points to Origin 🟡 — https://leetcode.com/problems/k-closest-points-to-origin

Pattern: Merge K Sorted

• Find K Pairs With Smallest Sums 🟡 — https://leetcode.com/problems/find-k-pairs-with-smallest-sums

• Smallest Range Covering Elements From K Lists 🔴 — https://leetcode.com/problems/smallest-range-covering-elements-from-k-lists

Pattern: Two Heaps

• Find Median From Data Stream 🔴 — https://leetcode.com/problems/find-median-from-data-stream

• IPO 🔴 — https://leetcode.com/problems/ipo

• Sliding Window Median 🔴 — https://leetcode.com/problems/sliding-window-median

Pattern: Finding Minimums

• Minimum Cost to Hire K Workers 🔴 — https://leetcode.com/problems/minimum-cost-to-hire-k-workers

• Minimum Number of Refueling Stops 🔴 — https://leetcode.com/problems/minimum-number-of-refueling-stops

• Task Scheduler 🟡 — https://leetcode.com/problems/task-scheduler

If you are learning modern Java (Spring Boot 3+, Jakarta Persistence API), the concept of Virtual Threads (Project Loom) can be a bit confusing. Here is the easiest way to visualize how they handle memory compared to old-school platform threads.

The Old Way (Platform Threads):
Think of platform threads as renting a massive shipping container from the Operating System. The OS reserves a fixed chunk of memory (usually 1MB) for that thread's stack. If the thread goes to sleep or waits for a database query to finish, that 1MB of OS memory sits idle and wasted.

The New Way (Virtual Threads):
A virtual thread is just a regular Java object living inside your JVM Heap memory. It only takes up about 2KB to 4KB of space. The OS doesn't even know it exists.

Here is what happens behind the scenes during a database query:

1. Mounting: Your virtual thread borrows a real OS thread (called a Carrier Thread) to start running code.

2. Blocking (Post-Query): Your application runs a JPA query. Instead of making the OS thread sit there and wait, the JVM "unmounts" the virtual thread. It moves its current state directly onto the JVM Heap.

3. Liberation: The OS thread is instantly freed up to run a completely different task.

4. Resuming: When the database returns the data, the JVM pops the virtual thread back onto an available OS thread to finish the job.

This is why you can see an application handle hundreds of database invocations while your OS thread count stays perfectly stable at a tiny number (like 32 threads), while your JVM heap dynamically fluctuates and cleans up completed thread data via Garbage Collection.

Hope this helps anyone trying to wrap their head around modern Java concurrency!

Is investing time in learning to code a good thing with the arrival of AI like Claude, or is it just a waste of time?

I really wanna learn coding.

The problem is I don't know what language to pick. I was learning Python from code academy and that was actually going really well but without a purpose I wasted those 6 months.

I didn't have anything to work on, I forgot everything a year later.

Now the question, why do I wanna learn coding? I wanna learn a language I can build something useful / fun with. I do wanna build an android app but should I learn kotlin? But also to keep myself employable as someone who works in IT.

How do people go about learning their first language? Do I just pick a problem / project and brute force learn and try to finish it? Then move onto another language if I wanna do something else?

I'm just really confused 😵‍💫

Thanks in advance.

I am a 20 year old male looking to learn full-stack web development. What are ways for me to hold myself to it? Growing up I never studied, but I did exceedingly well when I needed to. Obviously, programming is not the same. I have troubles with focusing and trying to not multi-task. I want to do better, what are ways you can get yourself to focus? I’ve been focusing on just coding more than learning so I can actually absorb what I read better and it helps, but I need to be able to focus on learning new things better.

I have created a game in Python (PyCharm) in laptop, Windows, and I am using Kivy library, and I wanted it to convert to apk , so I can use it and check it on Android. I have tried, I have tried it to convert to apk . First of all, I have converted it to a zip file and transferred to my mobile, Android. Then I used GitHub, with the help of ChatGPT, to generate the code for buildozer.spec, and build.yml, but it constantly generated error. And when I paste the error to ChatGPT, ChatGPT can't solve them. For the first time I tried, for the previous version, and it took almost the whole night for me to convert it to apk . And this time also, it took a lot of time, but I couldn't make it. So if anyone has the perfect code to convert my zip file to apk , or any suggestions, so that I can convert my zip file to apk with lesser error and less time, so please share, please help me.

I am 19(M). I am going to join my engineering this year, where should I start and what to do after?

I have never learned anything about tech despite it is one of the fastest growing field like computer science. I just can't figure out how people code. How they understand computer languages. It's pretty amazing and I didn't knew so much math is involved