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FindUtils2d ago · 9 min read

Is It Prime? Trial Division, Miller-Rabin and the 2^53 Wall in JavaScript

The FindUtils Prime Checker guide makes two choices I wanted to test in code. The tool uses plain trial division because it "never guesses", and it refuses any input above 9,007,199,254,740,991 instea

findutils.hashnode.dev

Nomad Wozo2d ago · 4 min read

Why 6% isn't 6%: APY vs. nominal rate in JavaScript (and the double-compounding bug)

I build small finance calculators that run entirely in the browser. The sneakiest bug in this kind of code isn't floating point. It's feeding the wrong kind of rate into the formula. Here's the short

nomadwozo.hashnode.dev

Miad SaadidiOct 15 · 7 min read

Modernizing the E6B Flight Computer: Deterministic Pure-Math Web Architecture

For nearly a century, every aviator has carried an aluminum or cardboard mechanical disc into the cockpit: the E6B Flight Computer. Invented in the late 1930s by US Naval Reserve Lieutenant Philip Dal

aeroway.hashnode.dev

CalcrioOct 15 · 3 min read

Percentages Made Easy: Increase, Decrease and Percent Change Explained

Percentages show up everywhere: price tags, salary raises, test scores, interest rates and fitness goals. Yet many people freeze when asked to work one out. The good news is that almost every percenta

calcrio.hashnode.dev

JigsawOct 15 · 6 min read

Where Did 90% of My Photo Go? JPEG Compression, Explained Gently

Drag a 4 MB photo into a compressor, and a few seconds later you get a 400 KB file that looks… the same. Nine-tenths of the data is gone and your eye can't find the hole. That should bother you more t

jigsawlabs.hashnode.dev

Kofi / IllestpreachaOct 8 · 1 min read

Mathober2026_FiveCircles

RoadToFive For my 11th sketch of Mathober2026 coded in HydraVideoSynth, RoadToFive showcases five circles attempting to form the five circle theorem (Theme of Day 7) but there is a bit of a struggle.

blog.illestpreacha.com

StepOneSep 12 · 8 min read

C# Generic Math: A Convex Hull with Static Interfaces

Static abstract interface members let a C# algorithm depend on operations instead of concrete numeric types. A convex-hull implementation is a good stress test: its coordinate type must support compar

steponeit.hashnode.dev

StepOneSep 8 · 16 min read

Lord of the Algebras: Groups, Rings, and Semirings in C#

The same matrix algorithm can count paths, find shortest paths, or find longest paths. The data structure does not change; the algebra assigned to its operations does. That is the practical payoff of

steponeit.hashnode.dev

StepOneSep 8 · 8 min read

Abstract Algebra in Action: Semigroups and Monoids in C#

Many production problems are aggregation problems in disguise: merge partial results, combine filters, reduce collections, or compute values in parallel. Abstract algebra gives those operations precis

steponeit.hashnode.dev

Waqas SolangiSep 3 · 1 min read

Building a Lightweight Loan EMI Calculator in Vanilla JavaScript

Calculating monthly loan payments (EMI) is a common requirement in fintech web apps. Here is a lightweight, client-side Vanilla JavaScript implementation to compute EMIs, total interest, and total rep

globaltoolsbox.hashnode.dev

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Is It Prime? Trial Division, Miller-Rabin and the 2^53 Wall in JavaScript

Why 6% isn't 6%: APY vs. nominal rate in JavaScript (and the double-compounding bug)

Modernizing the E6B Flight Computer: Deterministic Pure-Math Web Architecture

Percentages Made Easy: Increase, Decrease and Percent Change Explained

Where Did 90% of My Photo Go? JPEG Compression, Explained Gently

Mathober2026_FiveCircles

C# Generic Math: A Convex Hull with Static Interfaces

Lord of the Algebras: Groups, Rings, and Semirings in C#

Abstract Algebra in Action: Semigroups and Monoids in C#

Building a Lightweight Loan EMI Calculator in Vanilla JavaScript