Avoid hard to debug bugs and flaws by truly understanding how JavaScript handles holes in arrays.
Tag: JavaScript
Holey JavaScript Arrays
Do you know JavaScript arrays can have holes? How are empty slots different from undefined? And how do you differentiate between both? This article dives into sparse arrays and explains various ways to create them and associated gotchas with usage.
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
5 things I learnt from solving 100+ hackerrank algorithms
Sometime last year I started to solve hackerrank problems at my pace and here is my progress after about 108 days ago.
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
Continuing with the dive into property descriptors, this post goes deeply into the properties, what they mean and how they can be used.
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
How to detect page visibility in web applications
You are building a web application and need the application to pause whenever the user stops interacting with the page;
How to track errors in JavaScript Web applications
Your wonderful one-of-a-kind web application just had a successful launch and your user base is rapidly growing. To keep your customers satisfied, you have to know what issues they face and address those as fast as possible.
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 : Network
Tutorial on the chrome dev tools focusing on the network tab
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