10 one-liners that change how you think about JavaScript

Here’s something most JavaScript developers don’t know:

You can shorten any piece of code into a single line.

With one-liners I went from 17 imperative lines:

// ❌ 17 lines function extractRedirects(str) { let lines = str.split('\n'); let sourceDestinationList = []; for (let line of lines) { let sourceDestination = line.split(' '); let source = sourceDestination[2]; let destination = sourceDestination[3]; let redirectObj = { source: source, destination: destination, permanent: true, }; sourceDestinationList.push(redirectObj); } return sourceDestinationList; }

To a single functional statement:

// ✅ 1 line -- formatted const extractRedirects = (str) => str .split('\n') .map((line) => line.split(' ')) .map(([, , source, destination]) => ({ source, destination, permanent: true, }));

The second is so much cleaner and elegant — you can clearly see how the data beautifully flows from input to output with no breaks.

Let’s look at 10 unconventional JS one-liners that push you to the limits of what’s possible with JavaScript.

1. Shuffle array

What do you make of this:

// ✅ Standard Fisher-Yates shuffle, functional version const shuffleArray = (arr) => [...Array(arr.length)] .map((_, i) => Math.floor(Math.random() * (i + 1))) .reduce( (shuffled, r, i) => shuffled.map((num, j) => j === i ? shuffled[r] : j === r ? shuffled[i] : num ), arr ); // [ 2, 4, 1, 3, 5 ] (varies) console.log(shuffleArray([1, 2, 3, 4, 5]));

The most complex thing for me was figuring out the immutable no-variable version of the swap — and reduce() has a way of making your head spin.

Then there’s this too:

const shuffleArray = (arr) => arr.sort(() => Math.random() - 0.5); const arr = [1, 2, 3, 4, 5]; console.log(shuffleArray(arr));

I see it everywhere but it’s terrible for getting a truly uniform distribution.

2. Reverse string

❌ 8 lines:

const reverseString = (str) => { let reversed = ''; for (let i = str.length - 1; i >= 0; i--) { const ch = str[i]; reversed += ch; } return reversed; }; const reverse = reverseString('Indestructible!'); console.log(reverse); // !elbitcurtsednI

✅ 1 line:

const reverseString = (str) => str.split('').reverse().join(''); const reverse = reverseString('Indestructible!'); console.log(reverse); // !elbitcurtsednI

3. Group array by ID

Grouping arrays by a specific object property:

const groupBy = (arr, groupFn) => arr.reduce( (grouped, obj) => ({ ...grouped, [groupFn(obj)]: [ ...(grouped[groupFn(obj)] || []), obj, ], }), {} ); const fruits = [ { name: 'pineapple🍍', color: '🟡' }, { name: 'apple🍎', color: '🔴' }, { name: 'banana🍌', color: '🟡' }, { name: 'strawberry🍓', color: '🔴' }, ]; const groupedByNameLength = groupBy( fruits, (fruit) => fruit.color ); console.log(groupedByNameLength);

4. Generate random UUID

So many language concepts working together here:

const generateRandomUUID = (a) => a ? (a ^ ((Math.random() * 16) >> (a / 4))).toString(16) : ([1e7] + -1e3 + -4e3 + -8e3 + -1e11).replace( /[018]/g, generateRandomUUID ); console.log(generateRandomUUID()); // f138f635-acbd-4f78-9be5-ca3198c4cf34 console.log(generateRandomUUID()); // 8935bb0d-6503-441f-bb25-7bc685b5b5bc

There’s basic arithmetic, powers, random values, methods, bit-shifting, regexes, callback functions, recursion, exponentiation… it’s perfection.

5. Generate random hex color

1 line to generate a random hex color:

const randomHexColor = () => `#${Math.random().toString(16).slice(2, 8).padEnd(6, '0')}`; console.log(randomHexColor()); // #7a10ba (varies) console.log(randomHexColor()); // #65abdc (varies)

6. Array equality

Check array equality with a one-liner…

❌ 11 lines:

const areEqual = (arr1, arr2) => { if (arr1.length === arr2.length) { for (const num of arr1) { if (!arr2.includes(num)) { return false; } } return true; } return false; };

✅ 1 line:

const areEqual = (arr1, arr2) => arr1.sort().join(',') === arr2.sort().join(',');


// For more complex objects // and sort() will probably have a defined callback const areEqual = (arr1, arr2) => JSON.stringify(arr1.sort()) === JSON.stringify(arr2.sort());

7. Remove duplicates from array

Shortest way to remove duplicates from an array?

❌ 9 lines:

const removeDuplicates = (arr) => { const result = []; for (const num of arr) { if (!result.includes(num)) { result.push(num); } } return result; }; const arr = [1, 2, 3, 4, 5, 3, 1, 2, 5]; const distinct = removeDuplicates(arr); console.log(distinct); // [1, 2, 3, 4, 5]

✅ 1 line:

const arr = [1, 2, 3, 4, 5, 3, 1, 2, 5]; const distinct = [...new Set(arr)]; console.log(distinct); // [1, 2, 3, 4, 5]

This used to be like the only reason anyone ever cared for Sets — until we got these 7 amazing new methods.

8. Validate email

Email validation one-liners are all about that regex:

const isValidEmail = (email) => /^[\w-]+(\.[\w-]+)*@([\w-]+\.)+[a-zA-Z]{2,7}$/.test( email ); console.log(isValidEmail('hi@wp.codingbeautydev.com')); // true console.log(isValidEmail('hi@codingbeautydev.123')); // false console.log(isValidEmail('wp.codingbeautydev.com')); // false console.log(isValidEmail('hi@')); // false console.log(isValidEmail('hi@codingbeautydev&12')); // false

But I’ve seen monstrosities like this (more comprehensive):

const isValidEmail = (email) => /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/.test( email ); console.log(isValidEmail('hi@wp.codingbeautydev.com')); // true console.log(isValidEmail('hi@codingbeautydev.123')); // false console.log(isValidEmail('wp.codingbeautydev.com')); // false console.log(isValidEmail('hi@')); // false console.log(isValidEmail('hi@codingbeautydev&12')); // false

And even these (most comprehensive) — can you even see it:

const isValidEmail = (email) => /(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])/.test( email ); console.log(isValidEmail('hi@wp.codingbeautydev.com')); // true console.log(isValidEmail('hi@codingbeautydev.123')); // false console.log(isValidEmail('wp.codingbeautydev.com')); // false console.log(isValidEmail('hi@')); // false console.log(isValidEmail('hi@codingbeautydev&12')); // false

It’s probably about being as thorough as possible – let’s say the 1st one catches like 95% of wrong emails, then the 2nd like 99%.

The last one here is actually the official RFC 2822 standard for validating emails – so we’re looking at 100% coverage.

9. Convert JSON to Maps

const jsonToMap = (json) => new Map(Object.entries(JSON.parse(json))); const json = '{"user1":"John","user2":"Kate","user3":"Peter"}'; const map = jsonToMap(json); // Kate console.log(map.get('user2')); // Map(3) { 'user1' => 'John', 'user2' => 'Kate', 'user3' => 'Peter' } console.log(map);

10. Convert snake to camel case

Easily convert from snake casing to camel casing with zero temporary variables.

const snakeToCamelCase = (s) => s .toLowerCase() .replace(/(_\w)/g, (w) => w.toUpperCase().substr(1)); const str1 = 'passion_growth'; const str2 = 'coding_beauty'; console.log(snakeToCamelCase(str1)); // passionGrowth console.log(snakeToCamelCase(str2)); // codingBeauty

Final thoughts

Countless operations jam-packed into a single statement; A race from input start to output finish with no breaks, a free flow of high-level processing. A testament of coding ability and mastery.

This is the power and beauty of JavaScript one-liners.

New native nested CSS feature in 2024: An absolute game changer

The new native nested CSS feature changes everything for frontend development and makes SASS & LESS useless.

❌ Before:

How would you style the nested elements in this HTML?

<section> Hi! <div> <p><span>codingbeautydev.com</span> -- coding as a passion</p> Coding helps you achieve a sense of purpose and growth </div> </section>

You’d normally stress yourself and waste a lot of time repeating the outer element names.

No wonder SASS and LESS became so popular.

section { font-family: Arial; } section div { font-size: 1.5em; } section div p { color: blue; } section div p span { font-weight: bold; }

✅ But now: with native CSS:

section { font-family: Arial; div { font-size: 1.2em; p { color: blue; span { font-weight: bold; } } } }

So much cleaner and easier. All the styles are now encapsulated together instead of being scattered all over the place.

As intuitive as encapsulation in object-oriented programming:

// ❌ redundancy const personName = 'Tari Ibaba'; const personSite = 'codingbeautydev.com'; const personColor = '🔵blue'; // ✅ encapsulate field class Person { name = 'Tari Ibaba'; site = 'codingbeautydev.com'; color = '🔵blue'; }

In some browsers, you’ll need to use &:

section { font-family: Arial; & div { font-size: 1.2em; & p { color: blue; & span { font-weight: bold; } } } }

What about classes and IDs?

What if you wanted to style nested elements by their class or id attribute?

<section class="class1"> Hi! <div id="id1"> <p class="class2"> <span id="url">codingbeautydev.com</span> -- coding as a passion </p> Coding is cognitively challenging and mentally stimulating </div> </section>

The nested CSS will be quite similar:

.class { font-family: Arial; #id1 { font-size: 1.2em; class2 { color: purple; #url { font-weight: bold; } } } }

It also works with sibling selectors:

div { section { + p { color: blue; ~ p { color: red; } } } }

Pseudo-classes and elements


button { background-color: blue; :hover { background-color: yellow; } }

Media queries

Another huge selling point of nested CSS:

❌ Before:

Creating media queries was messy and the query styles and main styles for an element were separated:

.hamburger { display: none; } .header { font-size: 40px; } @media (orientation: landscape) { .header { font-size: 32px; } @media (max-width: 480px) { .hamburger { display: block; } .header { font-size: 24px; } }

✅ Now:

It makes more intuitive sense for the element styles to contain query styles — than for the query styles to contain small segments of the element styles.

Nested CSS lets you do this easily:

.hamburger { display: none; @media (max-width: 480px) { display: block; } } .header { font-size: 40px; @media(orientation: landscape) { font-size: 32px; } @media(max-width: 480px) { font-size: 24px; } }

With native nested CSS you can create styles in a more intuitive manner.

SASS is practically useless now — especially now that we also have native variables in CSS:

$base-font-size: 16px; $gutter-width: 10px; .container { padding: calc($gutter-width * 2); // Use calc with Sass variable font-size: $base-font-size; } .heading { font-size: calc($base-font-size * 1.5); // Modify base font size with calc }

“React” developers don’t exist

There is no such thing as a React developer — don’t ever call yourself that.

This is a huge mistake many software developers make that wastes so much of their time.

Focusing on tools instead of concepts. Losing sight of the big picture.

The fact is:

React is just a JavaScript tool. JavaScript is just a computing tool. Computing is just a problem-solving tool.

When I first started coding I was obsessed with languages and their specific syntaxes and APIs.

In fact once I hit a tiny learning roadblock I would switch to a new language expecting things to be different. And then again and again.

Not realizing that every language is fundamentally the same and built on the same core concepts!

  • Input processing output storage.
  • Selection sequence iteration.
  • Data and actions: Create Read Update Delete (“everything is CRUD”).
  • Divide & conquer: modules functions OOP…

There is no programming language anywhere that isn’t based on these core concepts. These are what you should focus on.

These are the abstract foundations of computing — of problem-solving in general.

That is why once I learned one language it was so much easier to learn any new one on the fly.

And the same thing for our natural languages — tools for communicating with other humans.

I’m learning French now and I’m seeing clear core components found in English and every other language:

  • Parts of speech: nouns, verbs & tenses, etc.
  • Grammar rules & idiosyncracies
  • Pronunciation & accent
  • Cultural idioms & slangs: that you’ll never know if you learned the language in a formal setting.

And the same thing for frameworks.

Some devs get so hung up on the specifics of React-Vue-Angular instead of focusing on the foundations:

  • Components & lifecycle: divide & conquer
  • State & updates: data flow & actions
  • SPA routing: navigation, etc.
  • Rendering: interpolation, conditional, etc.

Another mistake I made — reading and re-reading C++ books so I wouldn’t “forget” all those important string functions.

Why worry about the API specifics when you can easily look them up on Google?

And if it’s so crucial to be at your fingertips — like useEffect — that’s going to eventually happen when you search and use it enough times.

Because forgetting is a feature, not a bug.

It’s just like how many of us were taught all sorts of useless/esoteric things in school.

Instead of essential knowledge and skills to succeed in the real world:

  • How to learn, think, and solve problems
  • Social skills: negotiation, empathy, listening, etc.
  • Financial skills: Career decision, managing cashflow, investing, etc.
  • How to find fulfillment in life by setting goals and defining personal values

So programming is thinking not typing.

The tool you use to bring your thoughts into reality is less important than developing those thoughts in your brain.

10 tips to supercharge VS Code and code 10x faster (0 to 100)

95% of developers are just wasting the potential of VS Code.

It has so many hidden gems that upgrade your productivity and quality of life — but they’re not using them.

Use these 10 solid tips to gradually supercharge VS Code and code faster: with powerful extensions, little-known keyboard shortcuts, beautiful fonts & colors, and so much more.

1. First things first

Starting with the essentials.

Learn important keyboard shortcuts

You will code so much faster once you learn these

  • Copy line with Ctrl + C
  • Highlight code left & right with Shift + Left / Right
  • Move line up / down with Alt + Up / Down
  • Delete line with Ctrl + K
  • Close file with Ctrl + W
  • Close all files with Ctrl + K, W

Enable autosave

To save your files automatically.

I’ve talked about why I dislike autosave before, but it’s a great feature to stop the constant Ctrl + S’s.

Set up outline view

The Outline View gives you a quick overview of all the symbols in your active file from the File Explorer Pane:

But I recommend you move to a separate pane to have more space:

2. Set up source control

You need to set up integrations for Git to easily track your changes.

Init repo with VS Code

Use the Source Control Pane to initialize a new local repo.

Commit changes

You can quickly stage your files and press Ctrl + Enter anytime you need to commit:

Install this extension

Now install the GitLens extension for even better integration:

GitLens will show you essential repo data and info on your current file — file history, commits, branches, and more.

Place the cursor on any line in the editor and GitLens will display info on the latest commit where the line was changed:

3. Code faster with AI

GenAI has booming recently and now we have extensions that give you intelligent AI code completions as you type.

And IDE-integration chatbots, some of which use context from your codebase.

Great ones you can try:

  1. GitHub Copilot: paid, $10/month
  2. Coding Beauty Assistant: free, $10 per month for more features
  3. Tabnine: has free version, $12 per month

4. Learn snippets to code faster


With this I type much faster when working with JSX, CSS, HTML, and more.

One thing you’ll notice is how similar the abbreviations are to CSS selectors.

This is by design: Emmet syntax is inspired by CSS selectors.

Install this extension

JavaScript (ES6) code snippets: fully loaded with heaps of time-saving code snippets for JavaScript.

See how the imp and imd snippets quickly import the modules with the ES6 syntax:

5. Install keymaps and feel at home

Priceless if you’re used to another code editor.

So if you’re coming from:

  1. Vim: Install this extension
  2. Atom: Install this extension
  3. Visual Studio: Install this extension

For example in Atom, you could easily press A and Shift + A to create a new file or a new folder.

Installing the Atom keymap instantly brings this shortcut to VS Code — no need to manually edit hotkeys:

6. Start auto-linting code

You should install a linter to avoid errors and enforce style.

Use ESLint to quickly find and fix problems in your JS code and easily avoid poor coding practices — like unused vars:

7. Enable auto-formatting

Install Prettier to automatically format your code with consistent formatting.

With Format On Save, Prettier instantly formats your code when you press Ctrl + S.

You can enable it in Settings:

8. Set up debugging and testing

So VS Code already gives you fantastic debugging features.

Set breakpoints, inspect the call stack, watch variables and more.


These extensions will make testing much easier:

Clicking Run runs the particular test case with no need for the terminal.

9. Use a more code-friendly font

If you look closely you’ll see that I’m NOT using the default Consolas font.

I’m using Cascadia Code — a beautiful font from Microsoft with aesthetically pleasing code ligatures.


Fira Code is another great one I’ve used:

You can easily change your font in settings:

10. Beautify your editor with colorful themes

Color themes

Set up a beautiful theme to easily modify the colors of all the aspects of the UI.

Including your code’s highlighting:

Some great themes I’ve used:

You can change themes with the Settings icon:

Icon themes

The way VS Code displays icons in the File Explorer Pane is pretty underwhelming:

That’s why you should install VS Code Icons and spice things up:

The distinct icons make it much easier to understand every file and the purpose they play in the codebase.

Go from 0 to 100 in VS Code

Final thoughts

With all these new settings & extensions, you’re all set up to build rapidly and achieve your dev goals much faster.

The 5 most transformative JavaScript features from ES13

ES13 was packed with valuable features that completely transformed the way we write JavaScript.

Code became cleaner, shorter, and easier to write.

Let’s check them out and see the ones you missed.

1. Top-level await

With ES13 we were finally able to use await in the global scope!

❌ Before ES13:

// ❌ Syntax error: await is only valid in async functions await setTimeoutAsync(3000); function setTimeoutAsync(timeout) { return new Promise((resolve) => { setTimeout(() => { resolve('codingbeautydev.com'); }, timeout); }); }

We always had to put it in an async function or create an async IIFE:

// async IIFE (async () => { await setTimeoutAsync(3000); })(); // à la C++ async function main() { await setTimeoutAsync(3000); }

✅ After ES13:

// ✅ Waits for timeout - no error thrown await setTimeoutAsync(3000); function setTimeoutAsync(timeout) { return new Promise((resolve) => { setTimeout(() => { resolve('codingbeautydev.com'); }, timeout); }); }

2. Class declaration upgrades

Class field declarations

Before ES13 we could only declare class fields in the constructor!

Unlike in many other languages we could not declare or define them in the outermost scope of the class.

❌ Before:

class Site { constructor() { // ❌ wouldn't work outside this.url = 'codingbeautydev.com'; this.color = '🔵blue'; } } const site = new Site(); console.log(site.url); // codingbeautydev.com console.log(color); // blue

✅ Now with ES13:

Just like in TypeScript:

class Site { // ✅ no constructor needed url = 'codingbeautydev.com'; color = '🔵blue'; } const site = new Site(); console.log(site.url); // codingbeautydev.com console.log(color); // 🔵blue

Private methods and fields

Creating private methods was impossible before ES13.

We also had to the ugly underscore hack to indicate privacy — but that was just an indication.

❌ Before:

class Person { _firstName = 'Tari'; _lastName = 'Ibaba'; get name() { return `${this._firstName} ${this._lastName}`; } } const person = new Person(); console.log(person.name); // Tari Ibaba // We can still access private members! console.log(person._firstName); // Tari console.log(person._lastName); // Ibaba // They can also be modified person._firstName = 'Lionel'; person._lastName = 'Messi'; console.log(person.name); // Lionel Messi

✅ Now after ES13:

We can add private fields and members to a class by prefixing it with a hashtag (#):

You’ll get a syntax error if you try to access it from outside the class:

class Person { #firstName = 'Tari'; #lastName = 'Ibaba'; get name() { return `${this.#firstName} ${this.#lastName}`; } } const person = new Person(); console.log(person.name); // SyntaxError: Private field '#firstName' must be // declared in an enclosing class console.log(person.#firstName); console.log(person.#lastName);

We can see something interesting from the error message:

The compiler doesn’t expect you to even try to access private fields from outside the class — it assumes you’re trying to creating one.

Static class fields and static private methods

Static fields — properties of the class itself rather than any specific instance.

Ever since ES13 we can now easily create them for any class:

class Person { static #count = 0; static eyeCount = 2; static getCount() { // Access fellow static member with this return this.#count; } // instance member constructor() { // Access static member with this.constructor this.constructor.#incrementCount(); } static #incrementCount() { this.#count++; } } const person1 = new Person(); const person2 = new Person(); console.log(Person.getCount()); // 2

3. Array upgrades: new at() method

So usually we’d use square brackets ([]) to access the Nth of the array.

const arr = ['a', 'b', 'c', 'd']; console.log(arr[1]); // b

But accessing the Nth item from the end was always a pain — we had to index with arr.length - N:

❌ Before ES13:

const arr = ['a', 'b', 'c', 'd']; // 1st element from the end console.log(arr[arr.length - 1]); // d // 2nd element from the end console.log(arr[arr.length - 2]); // c

Luckily ES13 brought a new at() method that solved all that:

const str = 'Coding Beauty'; console.log(str.at(-1)); // y console.log(str.at(-2)); // t

4. Static class blocks

With static fields came static blocks.

To execute code only once, at the creation of the class — just like static constructors in OOP languages like C# and Java.

So you can create as many of them as you want in the class — all the code will run in the order you defined them:

class Vehicle { static defaultColor = 'blue'; } class Car extends Vehicle { static colors = []; static { this.colors.push(super.defaultColor, 'red'); } static { this.colors.push('green'); } } console.log(Car.colors); // [ 'blue', 'red', 'green' ]

5. Error reporting upgrades

So sometimes we catch errors of methods down the call stack only to rethrow it back up the stack.

But when we do this we lose crucial information from the original error:

try { userAction(); } catch (err) { // ❌ doesn't know fundamental cause of error console.log(err); } function userAction() { try { apiCallThatCanThrow(); } catch (err) { // 👇 rethrow throw new Error('New error message'); } } function apiCallThatCanThrow() { console.log('fetching from codingbeautydev.com...'); throw new Error('throwing for no reason'); }

That was why ES13 introduce a new cause property to preserve this important info and make debugging easier:

try { userAction(); } catch (err) { // ✅ now knows what caused the error console.log(err); console.log(`Cause by: ${err.cause}`); } function userAction() { try { apiCallThatCanThrow(); } catch (err) { // ✅ error cause throw new Error('New error message', { cause: err }); } } function apiCallThatCanThrow() { console.log('fetching from codingbeautydev.com...'); throw new Error('throwing for no reason'); }

Final thoughts

Overall ES13 was a significant leap for JavaScript with several features that have become essential for modern development.

Empowering you to write cleaner code with greater conciseness, expressiveness, and clarity.

Why parseInt(0.0000005) returns 5 in JavaScript

An interesting occurrence showing the sheer weirdness of JavaScript:

Just when you thought you knew everything about parseInt:

The funny thing is it returns 0 for four and five zeroes after the decimal point.

But just add one more zero and it starts acting crazy?

The difference from Number is even more stark.

parseInt vs Number — four and five zeroes:


parseInt vs Number — six zeroes:

But we figure it out eventually.

parseInt: The missing parts

By understanding how the parseInt function work:

It takes two arguments: the string and the base or radix.

parseInt(string) parseInt(string, radix)

Look what it does for 6 zeroes when it’s a string:

parseInt('0.5') // 0 parseInt('0.05') // 0 parseInt('0.005') // 0 parseInt('0.0005') // 0 parseInt('0.00005') // 0 parseInt('0.000005') // 0 // 6 parseInt('0.0000005') // 0 parseInt('015') // 15 parseInt('015', 8) // 13

But for Number:

Number('0.5') // 0.5 Number('0.05') // 0.05 Number('0.005') // 0.005 Number('0.0005') // 0.0005 Number('0.00005') // 0.00005 Number('0.000005') // 0.000005 // 6 ! Number('0.0000005') // 0.0000005 Number('015') // 15

But what happens when it’s a number?

A number like 0.0000005?

Step 1: Convert the number to a string

Number gets coerced to a string!

So look what parseInt does to 0.0000005:

String(0.5); // => '0.5' String(0.05); // => '0.05' String(0.005); // => '0.005' String(0.0005); // => '0.0005' String(0.00005); // => '0.00005' String(0.000005); // => '0.000005' String(0.0000005); // => '5e-7' 👈 this is important

Step 2: Do the actual rounding


parseInt(0.0000005) parseInt('5e-7')

And now see what happens for '5e-7' for parseInt:


Because of how parseInt works: It interprets only the leading portion of the string as an integer value.

It doesn’t recognize e, so it ignores it and everything onwards.

This is same reason why:

  1. parseInt(999999999999999999999) parseInt(1e+21) 1
  2. parseInt(0.0000007) parseInt(7) 7

So Number is your best bet if you wanna avoid surprises when converting a string to a number

And if you need just the integer part, Math.floor() is here for you:

Math.floor(0.5); // 0 Math.floor(0.05); // 0 Math.floor(0.005); // 0 Math.floor(0.0005); // 0 Math.floor(0.00005); // 0 Math.floor(0.000005); // 0 Math.floor(0.0000005); // 0 ✅ perfect

How I get $1000+ freelance clients consistently as a software developer (5 ways that work)

Don’t make the same mistake I did.

I used to spend hours cold-emailing strangers and applying to random low-quality job listings.

I thought it was all a numbers game.

But it was a complete and utter waste of time.

The truth is there are only 5 major strategies that work — and they are NOT easy (sorry).

If you use them blindly like 95% of people do: you will fail.

Or you get flaky, low-quality clients — if you’re lucky.

1. Build your 1st party network the right way

Most ways of networking are just a waste of time for freelancing.

Either they don’t work or it’s not worth it.

I don’t follow the tired clichéd advice of attending network events and meetups.

You will achieve much faster results online.

2 major ways I use:

  • Internal network building

My primary strategy.

I meet new people from people already in my network on WhatsApp and my email contacts.

These people end up either becoming clients or referring me to clients.

But it won’t work when you don’t have any network in the first place.

In that case, you’ll do:

  • External network building

You deliberately search for new people on social platforms — LinkedIn and Twitter are the best.

But you won’t just add any random people — quality matters just as much as quantity.

They need to meet specific criteria:

Example: if you already have a client in mind, you’d search for people in their network — like employees of the company.

2. Join an exclusive freelance network

This was by far the easiest way for me.

Building your network from scratch gives you more control — but it takes a lot of time, effort, and planning.

This is much faster.

In the networks I’m in I get offered at least 3 new freelancing opportunities every single day.

I don’t accept them all but when I do — these are no-nonsense clients with serious budgets.

But the hard part was finding legit networks and getting entry — they’re called exclusive for a reason.

3. Use freelancing platforms properly

Upwork is dead!

No it’s not. If it’s dead then where is their $1,400,000,000 market cap coming from?

You’re using it wrong. Simple.

For a start:

  • Don’t be a generalist:

“Programmer” won’t get you far.

“Next.js web developer” is much better.

“Next.js web developer building AI chatbots” is powerful.

  • Don’t expect fast money

I can tell you for free — starting from scratch on any online platform is no easy feat.

But once you get past a certain point, all the initial focus and consistency will be worth it.

  • Don’t be intimidated by the competition

A job may have 50+ proposals but many of the applicants are just mass-buying connections and spamming with AI.

You’ll stand out greatly if you personalize your cover letter.

4. Create “content”

And by content I don’t only mean posting on social media or blogging.

“Content” also includes your portfolio — on GitHub and more.

It means creating significant projects in your niche and talking about them.

It means sharing your experience and teaching others what you know.

Your discoveries, ideas, opinions, and what you’re passionate about.

You will boost your visibility and improve your chances of attracting great opportunities.

5. Run targeted ads

I put this one last because it’s quite risky.

Without a well-defined strategy, you’ll end up wasting money and getting nothing out of it.

You’ll need to run extremely targeted ads on Google, LinkedIn, and Facebook — and constantly refine your approach to see any real results.

Follow one or more of these strategies with persistence and you’ll eventually find high-quality clients.

Key points

Recap: 5 major ways to find $1000+ freelance clients as a software developer:

  1. Build your 1st party network
  2. Join an exclusive freelance network
  3. Use freelancing platforms properly
  4. Create content and code
  5. Run paid ads

New HTML <dialog> tag: An absolute game changer

HTML will never be the same with the new <dialog> tag.


See how much work it would have taken me to create a dialog 👇

Almost 20 lines of CSS alone:

And that’s just CSS for the dialog functionality — it will still look very basic:

But how about with the new <dialog> tag!

✅ Now:

<button id="open">Open</button> <dialog id="dialog"> ⚡Lighting strikes the earth 44 times every second! </dialog>
const dialog = document.getElementById('dialog'); const open = document.getElementById('open'); open.addEventListener('click', () => { dialog.showModal(); });

We can even use the show() method to show a non-modal dialog — less intrusive with no backdrop:

const dialog = document.getElementById('dialog'); const open = document.getElementById('open'); open.addEventListener('click', () => { dialog.show(); });

Dialogs have always been a powerful way to forcefully seize your user’s attention and slam information in their faces.

It’s been a staple feature of every UI design system from Material Design to Fluent Design.

But even as common as they are we always had to resort to third-party libraries or create custom components to use them.

And many of these libraries don’t even follow the official recommendations for usability & accessibility…

Example: pressing the Escape key should dismiss the dialog on the page — but this doesn’t happen for many custom dialogs.

So <dialog> changes all that.

Auto-open dialog

The open attribute keeps the dialog open from the moment you open the page:

<dialog id="dialog" open> Giraffes are much more likely to be struck by lightning than humans are. In fact, they're 30 times more likely </dialog>

Auto-close button

Yes, you could add close functionality with standard event listeners and the close() method:

const close = document.querySelector( '#dialog .close' ); close.addEventListener('click', () => { dialog.close(); });

But the built-in <dialog> makes this even easier — no JavaScript needed:

<dialog id="dialog"> ⚡Gain essential coding skills & knowledge at codingbeautydev.com <br /> <form method="dialog"> <button class="close">Close</button> </form> </dialog>

How to style <dialog> the right way

<dialog> has a special ::backdrop pseudo-element for styling the backdrop:

::backdrop { background-image: linear-gradient( 45deg, magenta, rebeccapurple, dodgerblue, green ); opacity: 0.75; }

Styling the main element is straightforward:

dialog { background-color: black; color: white; }

Final thoughts

With the new HTML <dialog> tag, creating modals and dialogs in our web apps has never been easier and faster.

How to write “natural” code everybody will love to read

The biggest reason we use languages like JavaScript and Python instead of Assembly is how much closer to natural language they are.

Or how much they CAN be!

Because sometimes we write code just for it to work without any care about demonstrating what we’re doing to other humans.

And then this backfires painfully down the line. Especially when one of those humans is your future self.

Parts of speech: back to basics

You know your code is natural when it resembles English as much as possible. Like an interesting, descriptive story.

It means you’ve intelligently made the entities and actions in the story to powerfully express the code flow from start to completion.


What entities are we talking about?

  • Variables
  • Properties (getters & setters)
  • Classes & objects.
  • Modules

Every character has a name, so we describe them with expressive nouns and noun phrases.

Not this:

// ❌ do-examples.ts // ❌ Cryptic const f = 'Coding'; const l = 'Beauty'; // ❌ Verb const makeFullName = `${f} ${l}`; class Book { // ❌ Adjectival phrase createdAt: Date; }

But this:

// ✅ examples.ts // ✅ Readable const firstName = 'Coding'; const lastName = 'Beauty'; // ✅ Noun const fullName = `${firstName} ${lastName}`; class Book { // ✅ Noun phrase dateCreated: Date; }


What are the actions in your codebase?

  • Functions
  • Object methods

An action means an entity is doing something; the naturally way to name them is with descriptive verbs and verb phrases.

Not this:

class Product { constructor(name, price, quantity) { this.name = name; this.price = price; this.quantity = quantity; } // ❌ Noun total() { return this.price * this.quantity; } } const product = new Product('Pineapple🍍', 5, 8); console.log(product.total()); // 40

But this:

class Product { constructor(name, price, quantity) { this.name = name; this.price = price; this.quantity = quantity; } // ✅ Verb getTotal() { return this.price * this.quantity; } } const product = new Product('Banana🍌', 7, 7); console.log(product.getTotal()); // 49

Methods are for doing something. Properties are for having something.

So better still:

class Product { constructor(name, price, quantity) { this.name = name; this.price = price; this.quantity = quantity; } get total() { return this.price * this.quantity; } } const product = new Product('Orange🍊', 7, 10); console.log(product.total); // 70


Remember an adverb tells you more about a noun or verb or another adverb.

In JavaScript this is any function that takes function and returns another: a higher-order function. They upgrade the function.

So instead of this:

// ❌ Verb function silence(fn) { try { return fn(); } catch (error) { return null; } } const getFileContents = (filePath) => silence(() => fs.readFileSync(filePath, 'utf8'));

It’ll be more natural to do this:

// ✅ Adverb function silently({ fn }) { // or "withSilence" try { return fn(); } catch (error) { return null; } } const getFileContents = (filePath) => silently({ fn: () => fs.readFileSync(filePath, 'utf8') });

It’s like saying, “Get the file contents silently“.

Natural inputs

Coding and computing are all about processing some input to produce output.

And in natural code the processing is action and the input + output are entities.

Let’s say we have a function that calculates a rectangle’s area and multiplies it by some amount.

Can you see the problem here?

const area = calculateArea(2, 5, 10); // 100

Which argument is the width and height? Which is the multiplier?

This code doesn’t read naturally; In English we always specify objects of an action.

How to fix this? Named arguments:

// Inputs are entities - nouns✅ const area = calculateArea({ multiplier: 2, height: 5, width: 10 }); function calculateArea({ multiplier, height, width }) { return multiplier * height * width; }

This is far easier to read; we instantly understand what inputs we’re dealing with.

Even when there’s just 1 argument I recommend using this.

Natural outputs

And we can be just as explicit in our outputs:

const { area } = calculateArea({ multiplier: 2, height: 5, width: 10, }); function calculateArea({ multiplier, height, width }) { return { area: multiplier * height * width }; }

Which also allows us easily upgrade the function later:

const { area, perimeter } = calculateArea({ multiplier: 2, height: 5, width: 10, }); console.log(area, perimeter); // 100 60 function calculateArea({ multiplier, height, width }) { return { area: multiplier * height * width, perimeter: (height + width) * 2 * multiplier, }; }

There’s no time for magic

Coding isn’t a mystery thriller! It’s a descriptive essay; be as descriptive as possible.

Not this cryptic mess:

function c(a) { return a / 13490190; } const b = c(40075); console.log(p); // 0.002970677210624906

What do all those numbers and variables mean in the bigger picture of the codebase? What do they tell us – the human?

Nothing. They tell us nothing. The entity & action names are either non-existent or of terrible quality.

It’s like telling your friend:

Yeah I went to this place and did this thing, then I did something to go to this other place and did something of 120!.

This is nonsense.

Natural code describes everything. Nice nouns for entities, great verbs for the actions.

const speedstersSpeedKmPerHr = 13490190; const earthCircumferenceKm = 40075; function calculateSpeedstersTime(distance) { return distance / speedstersSpeedKmPerHr; } const time = calculateSpeedstersTime(earthCircumferenceKm); console.log(time); // 0.002970677210624906 ~ 11s

Now you’ve said something.

Yeah I went to the restaurant and ate a chicken sandwich, then I drove to the gym and did bicep curls of 120 pounds!.

Create “useless” variables

Variables in natural code are no longer just for storing values here and there.

They’re also tools to explain what you’re doing:

That’s why instead of doing this:

if ( !user.isBanned && user.pricing === 'premium' && user.isSubscribedTo(channel) ) { console.log('Playing video...'); }

We’ll do this:

const canUserWatchVideo = !user.isBanned && user.pricing === 'premium' && user.isSubscribedTo(channel); if (canUserWatchVideo) { console.log('Playing video...'); }

We’re going to use the variable only once but it doesn’t matter. It’s not a functional variable but a cosmetic variable; a natural variable.

Final thoughts

Code is for your fellow humans too, not just compilers.

Can someone who doesn’t know how to code understand what’s going on in your code?

This is no doubt a powerful guiding question to keep your code as readable an natural as possible.

5 unexpected ways coding upgrades your life — beyond making money

I could code for many hours straight but I usually couldn’t say the same about writing!

And I always wondered why.

But I knew it was because of certain underlying emotions and values I felt when coding but didn’t quite feel for writing.

Eventually, I discovered at least 5 things about coding that make it so enjoyable and meaningful.

Things that can make any activity more pleasurable and fulfilling.

1. Purpose

There’s a deep sense of purpose in coding that gives us constant drive & passion.

A reason to wake up in the morning.

Every massive coding project is a brand new mission in itself with lots of exciting goals & milestones.

It’s an endless adventure.

Imagine creating an endless runner game like Subway Surfers from scratch:

You will have so many invigorating things to do:

  • Download & install the game engine: like Unity
  • Create the sprites: characters, hoverboards, costumes, etc.
  • Create the algorithm for the endless running…

Every milestone gives you a strong sense of accomplishment & direction.

2. Growth: of people & code


Growing as a person makes life feel new and exciting.

You grow when you gain more of something valuable:

  • Strength: Levelling up at the gym
  • Freedom: Beating an addiction: alcohol, porn, etc.
  • Knowledge: Becoming more fluent in a language

As you improve your coding knowledge & skills you feel like you’re making focused progress as an individual.

You get better at:

  • Solving problems: and designing algorithms
  • Writing clean, readable code
  • Writing modular cohesive code with minimal coupling

Your code

You nurture when you help something else grow:

  • Raising children
  • Body transformation coaching
  • Gardening

When you code, you nurture programs.

Every new line and every new commit upgrades the system with new capabilities.

At a high level:

  • You give it more features
  • You make it faster
  • You improve the UI


  • You refactor: greater readability
  • You fix bugs
  • You create tests: greater stability

3. Cognitive challenge: and mental stimulation

No secret that coding makes your brain work!

Just like:

  • Chess
  • Philosophy
  • Debating & solving math proofs

You need lots of logical processing and memory retrieval to create problem-solving algorithms.

Especially for complex games and backend-heavy apps.

You stretch your cognitive abilities and enter into an enjoyable state of flow — keeping you glued to the chair for hours.

And when you’re done you feel a deep sense of accomplishment.

It’s a key reason why we created Coding Beauty Play — regular puzzles to test your memory and make you think!

Just see all the processing needed to go from the formatted string to the number:

4. Power: of creation & automation

Coding transforms you into an all-powerful digital god.

You can autonomously create a brand new world of your own with nothing but your thoughts.

It’s a major reason why game programming and front-end UI design can be so exciting.

And where did all the millions of games & apps we use every day come from?

They didn’t come from the investor money or the code editors; these were just tools.

They came from the minds of the creators and developers.

It all started with an idea — ideas that go on to revolutionize the world and generate billions.

Making an impact on both the virtual and physical world.

Of automation

With coding, you complete unbelievable amounts of work in fractions of a second.

Think of all the work Google Search does every day:

  • 99,000 queries every second
  • 8.5 billion searches per day
  • 2 trillion global searches per day

This is simply out of the bounds of manual human ability, to put it lightly.

With automation I finally stopped those annoying Windows Updates.

By creating a tiny app to constantly stop the services any time Windows auto-restarted them.

5. Unity: of code & humans

Of code

Coding brings you face-to-face with the beauty of collaboration.

You experience the magnificence of various components of a complex system cohesively working together towards a common end.

Like carefully connected pieces on a chessboard working in harmony.

You see this when you split up your files into modules and objects.

Every single module plays its role in achieving the overall goals of the larger system.

They have the opportunity to be part of a community; of something bigger than themselves.

Of humans

And so do we when we work as a team.

We feel a shared sense of belonging as we strive toward a common goal together.

We are energies by the connection and fulfilled by our contributions towards the group and the mission.

Join the community on Discord for more engaging & free-flowing discussions on these things, and tips for leveling up and earning more as a developer.