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Discussion on: 17 Pro JavaScript tricks you didn't know

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michi profile image
Michael Z • 
// Noobs:

let num = 15; 
let s = num.toString(); // number to string
let n = Number(s); // string to number

// Pro:

let num = 15;
let s = num + ""; // number to string
let n = +s; // string to number
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Sorry, but clever != pro. The "Noob" version much better reveals the intent of the code.

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rahxuls profile image
Rahul •

I agree. But you know the pro version is better when you know many things about JS and doing big projects. I too had some doubt when writing this.

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zhnedyalkow profile image
Zhitomir Oreshenski •

It is not readable and maintainable in the long run.

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rahxuls profile image
Rahul •

Agree.

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hspaans profile image
Hans Spaans •

I wouldn't say better as it reduces the readability and maintainability of the code a lot. Having a language with strict type casting may seem a hassle for some, but it saves you hours of debugging in the long run. It was one of the significant reasons for the development of TypeScript and as a goal for both PHP 7 and Python 4.

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rahxuls profile image
Rahul •

People write codes with their read comfort ability.

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seanmclem profile image
Seanmclem •

Pretty much the #1 rule when learning programming is to not only write for yourself but with future coders and teammates in mind.

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misobelica profile image
Mišo •

Sorry, but I have to strongly disagree. Please don't make people think it's better to complicate things. The Noob version is actually a Pro especially in big projects. I already wrote it here dev.to/misobelica/comment/15b21

JS is not the best language even without these quirks. We should know them but consider them a very sad code smell and not a Pro version.

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rahxuls profile image
Rahul •

I'm sorry sir. When i will post again something related to this i will surely keep this in mind. Currently i'm writing through my phone so it will be hard for me to do. I'm sorry once again

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lvegerano profile image
Luis Vegerano •

I would never approve a PR with something like that.

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madza profile image
Madza •

was going to say that too 😉

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x1k profile image
Asaju Enitan •

I am not so cool with the "pro" code, def not advisable for team based projects

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aralroca profile image
Aral Roca •

Same for

if(a!=123) // before // NOOBS

if(a^123) // after // PRO
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a^123 is not very clean IMO. Maybe a better one will be if(a !== 123)

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nucliweb profile image
Joan León •

IMHO

if(a!=123) // before // NOOBS

if(a!==123) // after // PRO
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migueloop profile image
Miguel Ruiz •

Also we should think this is something that someone who comes from another Programming Language won't understand easily, just for saving 1 character

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aralroca profile image
Aral Roca • • Edited

And it's not correct for decimal numbers.

Boolean(122^123) // true
Boolean(123.1^123) // false -> is not correct, should be true 123.1 !== 123
Boolean(123^123) // false
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Much better to use the !== operator.