The Mutex Club: The Perils of Java’s Single-Thread Executor
Key Insights # FIFO & Mutual Exclusion When all you want is one thing happening at a time, newSingleThreadExecutor() is your velvet-rope…
The Mutex Club: newCachedThreadPool()—Miracle Worker or Unmitigated Footgun?
The Siren Song of Infinite Threads Java’s newCachedThreadPool() is the coding equivalent of an all-you-can-eat buffet: no headcount limit,…
The O(n) Club: Taming LeetCode’s Flatten Nested List Iterator Without Losing Your Mind
The O(n) Club: Taming LeetCode’s Flatten Nested List Iterator Without Losing Your Mind ⚡ TL;DR If you thought recursion was wild, try feeding…
The O(n) Club: Hamming Distance: When Your Bits Can’t Agree (And Why XOR is King)
The O(n) Club: Hamming Distance — When Your Bits Can’t Agree (And Why XOR is King) ⚡ TL;DR How many bits do x and y disagree on? XOR them,…
The Mutex Club: newFixedThreadPool Exposed—Why Your Thread Pool is Plotting Against You
Key Insights # Fixed Threads, Unlimited Queue Java’s newFixedThreadPool(int n) gives you n threads consuming tasks from an unbounded…
The Mutex Club: Master Java’s ExecutorService Without Losing Your Mind
Introduction to Java’s ExecutorService Remember juggling flaming torches blindfolded? That’s manual thread management in Java. You new…
The O(n) Club: Sum of Left Leaves — Because Trees Are Funnier Than You Think
The O(n) Club: Sum of Left Leaves — Because Trees Are Funnier Than You Think ⚡ TL;DR If you can’t tell your left from your right, this is the…
The O(n) Club: Palindrome Partitioning II—Fewer Cuts, Less Regret
The O(n) Club: Palindrome Partitioning II—Fewer Cuts, Less Regret ⚡ TL;DR Chop a string into palindromic slices using as few cuts as possible…
The LongAdder Lowdown: Java’s Secret Weapon for High-Speed Counters
The LongAdder Lowdown: Java’s Secret Weapon for High-Speed Counters ## TL;DR Java’s LongAdder splits a single counter into multiple…
The Mutex Club: compareAndSet() Unlocked ⚙️
🚦 Introduction to compareAndSet()\n\ncompareAndSet(), commonly called CAS (compare-and-swap), is your CPU’s atomic power move: it checks a…