Why doubling makes a dynamic array O(1) (and the realloc bug almost everyone writes)
If you have used std::vector or Python lists, you have used a dynamic array. In C you have to build it yourself, and two details decide whether it i…
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Understanding Stacks and Queues in Go
Stacks and queues are two of the simplest data structures, and two of the most useful. They show up everywhere: undo history, parsing, graph travers…
LeetCode 4000 - 4010 problems: patterns and approaches explained
LeetCode has started publishing problems numbered 4000 and above. At the time of writing this post, there are already 4055 problems. In this post, I…
An O(1) Space Alternative to "Rearrange Array Alternately" Using Sequential Suffix Reversal
If you've spent time on LeetCode or GeeksforGeeks, you've probably run into the classic "Rearrange Array Alternately" problem. The premise: given a…
The circular_buffer trap: how a 'faster' data structure spiked my CPU from 2% to 25%
There's a special kind of bug that only shows up after you've made your code "better." You swap in the data structure everyone agrees is more effici…
JavaScript has no sorted containers. I built one for TypeScript.
JavaScript ships with Array , Set , and Map — but nothing that keeps its elements sorted as you insert. If you've ever built a leaderboard, an order…
What I Learned in Week 8 of Python — Stacks, Queues & Linked Lists
Week 7 was hash maps and two pointers — patterns that lean on Python's built-in dict , set , and list . Week 8 was different. This week I built the…
The Protocol Behind Python's Containers
Lists, tuples, dicts, and sets look like four different things. Underneath, they share the same idea: they all implement a small set of protocols, a…
Structure Before Bytes: How Metarc Beats tar+zstd on Real Code
tar+zstd is very hard to beat. So I stopped trying to beat it as a byte compressor. Instead, I tried something else: compress the structure first, t…
Data Management Systems: From Transactional Databases to Analytical Architectures
Data is no longer treated as a byproduct of business operations and has become one of the most valuable organizational assets. Every interaction on…