Day 3 of 21 Days of Javascript

Michael Tefula

11 Aug 2025 — 1 min read

Today I worked through Chapter 4 of Eloquent Javascript and completed the first exercise. I'll do the rest tomorrow. Key areas covered were:

Arrays and how to traverse them.
Methods and properties of objects and how to access them.
A short bit on JSON.

I'm starting to get used to JS syntax. It just takes practice. Also, I've used ChatGPT to help me understand the quirks of JS. I continue to only AI only for extra explanations, rather than direct answers to any exercises or solutions I'm working through. Here's an example of a question I asked earlier today.

Day 5 of 21 Days of Javascript

I'm starting to see why some people said this book isn't for beginners. The exercises are hard and it takes wider reading outside of the book and re-reading chapters for ideas to really stick. For example here's a concept one exercise requires: Linked Lists.

Day 4 of 21 Days of Javascript

Javascript still seems strange to me compared to Python. This is something I'll get over with some muscle memory. Here's a quirk I found today. Accessing Items in an Array by their Position: In python we simply use square brackets and this works just fine: my_

Day 2 of 21 Days of Javascript

Day 2 Learnings Today I firmed up three main ways of writing functions * Function Expressions (Need semicolon at the end, not hoisted.) * Function Declarations (No semicolon, hoisted.) * Arrow Functions (Short syntax, , not hoisted.) Here's some example code: // 1. Function Expression // - Assigned to a variable named min // -

Day 1 of 21 Days of Javascript

I've long avoided trying to learn Javascript. It's virtually everywhere (including this web browser) and it's the number 1 programming language in the world (see chart below.) I much prefer Python, which I've used for a few years now. I got to

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Day 5 of 21 Days of Javascript

Day 4 of 21 Days of Javascript

Day 2 of 21 Days of Javascript

Day 1 of 21 Days of Javascript