Flattening Arrays in JavaScript
Flatten arrays in JavaScript with flat(), depth control, recursion, stack‑based helpers, and clear examples of how non‑array values are handled.
Articles
Guides, page 10 of 22
The guides are the practical part of this archive: working explanations for a specific web development problem, written to show the decision as well as the answer. The subject varies, but the aim is consistent: enough context to use the technique sensibly rather than copy it blindly.
Flattening Arrays in JavaScript. 
Unit Testing in Angular: Writing Effective Tests. Unit Testing in Angular: Writing Effective Tests
How to write effective Angular unit tests that focus on behaviour, TestBed boundaries, realistic setup, and assertions that survive refactoring over time.
Delete All Local Git Branches Except for master or main. Delete All Local Git Branches Except for
masterormainClean up local Git branches safely with commands that keep main or master, explain ‑d versus ‑D, and avoid accidental remote branch mistakes in busy repos.
Use JavaScript to Find the Week Day from a Date. Use JavaScript to Find the Week Day from a Date
Find the weekday from a JavaScript date with Date, UTC alternatives, modulo arithmetic, parsing caveats, daylight saving time, and readable day names.
Understanding Object Types with JavaScript's instanceof. Understanding Object Types with JavaScript's
instanceofUncover the differences between JavaScript's
instanceofandtypeoffor type checking, with practical examples and insights on when to use each operator.
Implementing Authentication in Next.js Using NextAuth.js. Implementing Authentication in Next.js Using NextAuth.js
A practical guide to implementing authentication in Next.js with NextAuth.js, including sessions, callbacks, route protection, and router‑specific trade‑offs.
reduce() in JavaScript. reduce()in JavaScriptUnderstand JavaScript reduce() with accumulator patterns, initial values, practical examples, readability trade‑offs, and when reduce() genuinely helps.
Creating Progressive Web Apps (PWAs) with Angular. Creating Progressive Web Apps (PWAs) with Angular
How to build a Progressive Web App with Angular, including service workers, caching, offline behaviour, installs, and the trade‑offs behind the defaults.
Object Equality in JavaScript: {} isn't Equal to {}. Object Equality in JavaScript:
{}isn't Equal to{}In JavaScript two empty objects are not equal. One of my go‑to interviewing questions, here I offer an explanation and strategies to compare object contents.
Pure Functions in JavaScript. Pure Functions in JavaScript
Pure functions make JavaScript easier to test, reason about, and reuse. This guide explains what purity means and why it matters in everyday code.
Understanding the Composition API in Vue 3. Understanding the Composition API in Vue 3
The Vue 3 Composition API explained with practical TypeScript examples, refs, composables, reactivity, and when the pattern genuinely helps larger components.
Angular Change Detection: How It Works and How to Optimise It. Angular Change Detection: How It Works and How to Optimise It
Angular change detection explained through zone triggers, OnPush, signals, template cost, manual checks, and practical rendering optimisation at scale.
Validating Parentheses Input Using TypeScript. Validating Parentheses Input Using TypeScript
Validate mixed parentheses and brackets in TypeScript with a stack, check nesting order, and see why separate counters and two pointers are not enough.
Leveraging .then() in Modern JavaScript. Leveraging
.then()in Modern JavaScript.then() still matters in modern JavaScript. This guide explains promise chaining, return values, and why Promise.prototype.then() remains useful.
Stopping Propagation vs. Preventing Default in JavaScript. Stopping Propagation vs. Preventing Default in JavaScript
Understanding
stopPropagationandpreventDefaultis key to handling events in JavaScript. Here, I explore their differences and when to use each.
Solving the 'Letter Combinations of a Phone Number' Problem with TypeScript. Solving the 'Letter Combinations of a Phone Number' Problem with TypeScript
An exploration of solutions to the 'Letter Combinations of Phone Number' problem using front‑end and TypeScript: recursion, backtracking, and iteration.
LeetCode: Converting Roman Numerals to Integers. LeetCode: Converting Roman Numerals to Integers
Convert Roman numerals to integers in JavaScript, covering subtractive notation, invalid input caveats, and a clear TypeScript implementation.
LeetCode: Converting Integers to Roman Numerals. LeetCode: Converting Integers to Roman Numerals
Convert integers to Roman numerals in JavaScript, covering symbol rules, greedy matching, edge cases, and a clear TypeScript implementation.