Alexis Hope ENGINEERING & DESIGN NOTES

JavaScript

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Tail Call Optimisation in Haskell and JavaScript

#Haskell#JavaScript#TypeScript#FunctionalProgramming#GHC

A tail call is a function call that is the last thing a function does before returning. That sounds like a minor implementation detail. It isn’t. Whether a runtime honours tail calls — replacing the current stack frame rather than pushing a new one — is the difference between …

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npm Commands You're Probably Not Using

#npm#Node#TypeScript#JavaScript#Tooling

Most developers know npm install, npm run, and npm publish. The rest of the CLI tends to be discovered only when something breaks — which is the worst possible time to learn a debugging tool. These are the commands I’ve found myself reaching for repeatedly, in rough order of how …

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Array handling in JS with functional purity

#Javascript#FP#Functional Programming

Functional programming has influenced JavaScript style significantly over the last decade. Pure functions — those that produce no side effects and return the same output for the same input — are now a widely adopted convention. But JavaScript is not a pure functional language, …

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Toxic bias in the Javascript community

#Javascript#FP#Functional Programming

Having been in the Javascript community for a while I’ve witnessed the building momentum towards a Functional Programming (FP) style. I think Javascript and FP are great but there is perhaps a misguided favor or emphasis put on FP as something superior. The React community help …

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SVG Path Functions

#SVG#D3#DataViz#Animation#JavaScript

SVG paths are written as a single d attribute — a mini-language of commands and coordinates that describes shapes. Each command is a letter; uppercase means absolute coordinates, lowercase means relative to the current position. This is a reference for all path commands with …

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Joomla 1.5 Component with Jquery and Mootools

#Javascript#PHP

I’ve been building a component for Joomla 1.5 and I really wanted to use Jquery in the admin over Mootools. Unfortunately Googling for this answer is tricky as so many people are posting examples how to remove Joomla js from their frontend template. The following is very ‘hacky’ …

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Javascript Date & Time Utilities

#Javascript

JavaScript’s built-in Date API is famously awkward. For most production work, Day.js is the right answer — it’s a 2kb drop-in that gives you immutable date objects, a chainable API, and a plugin ecosystem that covers almost every edge case. But if you’re keeping dependencies …

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