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.
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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.
Pure Functions in JavaScript. 
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.
Staying Current: Automating Copyright Year Updates. Staying Current: Automating Copyright Year Updates
Automate copyright year updates across JavaScript, React, Angular, Vue, jQuery, PHP, and WordPress so footers do not go stale each January across stacks.
Repetitive Asynchronous Tasks with JavaScript's setInterval(). Repetitive Asynchronous Tasks with JavaScript's
setInterval()A discussion about using JavaScript's setInterval for repetitive tasks. Manage intervals effectively and understand best practices for time‑bound executions.
Dynamic Navigation with React Router. Dynamic Navigation with React Router
Understanding and Solving Regular Expression Matching. Understanding and Solving Regular Expression Matching
Solve regular expression matching with recursive and dynamic‑programming context, covering dot and star behaviour, edge cases and TypeScript.
LeetCode Container with Most Water: The Two‑Pointer Solution. LeetCode Container with Most Water: The Two‑Pointer Solution
Solve Container With Most Water in TypeScript using the two‑pointer pattern, with pointer movement, complexity, edge cases, and testable logic explained.
How Much Do Software Engineers Make in the UK? How Much Do Software Engineers Make in the UK?
How much software engineers make in the UK, with realistic late‑2023 salary ranges for graduate, mid‑level, senior, London, and sector‑driven roles.
Top Reasons to Work with a Local Web Developer in Brighton. Top Reasons to Work with a Local Web Developer in Brighton
Discover why working with a local web developer in Brighton matters. With local insight, tailored solutions, and reliable support, Brighton businesses benefit.
Is a Software Engineer High Paying? Is a Software Engineer High Paying?
Is software engineering high paying in the UK? Usually yes after the early career stage, though pay varies a lot by location, sector, seniority, and company.
Understanding prototype.apply() in JavaScript. Understanding
prototype.apply()in JavaScriptUnderstand Function.prototype.apply() in JavaScript, including this binding, array‑like arguments, call() differences, dynamic invocation, and modern use cases.