Avoid hard to debug bugs and flaws by truly understanding how JavaScript handles holes in arrays.
Category: JavaScript
JavaScript Arrays Are Objects
JavaScript arrays show object-like behaviours in a variety of ways.
How well do you know JavaScript Arrays?
I decided to write about sparse and dense arrays several months ago. I thought it would be easy and imagined writing a masterpiece based off my multi-year experience with arrays. Alas, my foray into the intricacies of Arrays unearthed surprising discoveries and shattered my brittle expertise. This series of posts describes my learnings and Aha moments.
Why JavaScript sorts wrongly
JavaScript sort algorithm gives surprising results. Read on to learn more.
Understanding JavaScript Array methods: Unshift and Shift
Shift and Unshift are the counterparts of Push and Pop. This post provides a deep dive into their applications.
JavaScript Array Deep Dive: Push and Pop
Push and Pop are two popular methods for handling arrays in JavaScript; this short post explores both array methods.
Check Endianness with JavaScript
How to check for endianness using JavaScript
What you didn’t know about JSON.parse
Now that you know some more about JSON.stringify; let's dive into its complement: JSON.parse. 1. JSON.Parse The JSON parse function takes in a string (invalid JSON will cause a SyntaxError exception). If parsing succeeds, JSON.parse returns the corresponding value or object. 2. The reviver function JSON.parse accepts an optional reviver function. This reviver function, if specified, allows you … Continue reading What you didn’t know about JSON.parse
Nope, You don’t need lodash for that
I recently had to reduce the size of an Angular Web app for performance reasons. A quick run through the webpack bundle analyzer identified MomentJS and Lodash as the main culprits. Consequently, I had to eliminate both libraries and implement replacements in pure ES6.
Ensuring Integer results in JavaScript
One of the ways JavaScript differs from most programming languages is the absence of integer types.
Why you should not use isNaN in JavaScript
Nan literally means Not a Number. Yes, it means that value is not a number and occurs when you try to coerce a non-mathematical value (e.g. string) into a number.
Faking goto in JavaScript with Labeled Statements
What if I told you JavaScript had a limited form of the infamous goto statement? Surprised? Read on.
What you didn’t know about JSON.Stringify
This post shows a couple of new tricks and ways to properly leverage the hidden capabilities of JSON.stringify covering: JSON expectations and non-serializable data formats, How to use toJSON() to define objects properly for JSON serialization, The replacer option for filtering out values dynamically, the spaceparameter for formatting JSON output. The post also covers the difference between stringifying arrays and objects containing non-stringifiable fields
JavaScript has no Else If
A surprising random fact about JavaScript is the lack of else if support
Why JavaScript has two zeros: -0 and +0
Do you know there are two valid zero representations in JavaScript?
Understanding JavaScript Property Descriptors 3
Now that we know the basics, this post covers the JavaScript methods for setting and modifying object property descriptors.
Understanding JavaScript Property Descriptors 2
If this is your first time here, you should read the first post in this series. Then come back to this to continue. Continuing with the dive into property descriptors, this post goes deeply into the properties, what they mean and how they can be used. 1. Modifying existing properties The defineProperty method allows users to create and modify … Continue reading Understanding JavaScript Property Descriptors 2
Deep dive into JavaScript Property Descriptors
There are a couple of ways to assign properties to objects in JavaScript. The most common example is using obj.field = value or obj['field'] = value. This approach is simple however, it is not flexible because it automatically defines property descriptor fields
Why I am moving to Angular 2 from AngularJS
If you are thinking of choosing between Angular 1 or Angular 2, I'll say go for Angular 2; it's totally worth it.
Book Review:Build your own AngularJS
As part of my continuous learning; I started reading Tero Parviainen's 'Build your own AngularJS' about 6 months ago. After 6 months and 127 commits, I am grateful I completed the book.
How function spies work in JavaScript
If you write unit tests, then you likely use a testing framework and might have come across spies. If you don't write unit tests, please take a quick pause and promise yourself to always write tests.
Learning ES2015 : let, const and var
Lions at the zoo Zoos allow for safely viewing dangerous wild animals like lions. Lions are caged in their enclosures and can't escape its boundaries (if they did, it'd be chaos eh?). Handlers, however, can get into cages and interact with them. Like cages, you can think of variable scoping rules as establishing the boundaries and walls in … Continue reading Learning ES2015 : let, const and var
Getting Started with ES2015
A brief introduction to some of the reasons for ES2015/ES6
Chrome dev tools deep dive : Sources
Deep dive into features of the Sources tool in Chrome
Chrome dev tools deep dive : Console
The console is one of favorite places. The REPL environment is a quick way to validate JavaScript expressions. However, there is a lot more it can do. Read on. 1. $0 - $4 selectors The last inspected element is always available in the console as $0. $1 points to the next most-recently element and so … Continue reading Chrome dev tools deep dive : Console
