Immutable

[Tahirandreas]

On Saturday, 27 March 2021 at 20:44:12 UTC, Brad wrote:
> I was looking through lots of sample code on Rosetta Code.  D 
> has a lot of solutions out there.  That is really nice but it 
> has me wondering - coming from other languages that do not 
> support the concept of immutability - do real world programmers 
> and/or hobbyists really use it as much as I see it on Rosetta 
> Code?  I know it adds a layer of security to your code, but I 
> am still thinking "why?".
>
> Thanks for entertaining a newbie question.

Hey, Brad!

I understand that immutability might seem like overkill to you. 
Especially if you're used to languages that don't have it. But 
Meta says that using immutable types, like for strings, can 
really improve code performance and security.

When strings are arrays of immutable characters, the compiler can 
optimize its work with them and not waste resources on copying 
data. This is especially useful in large projects where every 
little detail matters.

If you're interested, I can recommend some articles and examples 
that show how immutability helps in real-world tasks 
https://www.bloomberg.com/graphics/2015-paul-ford-what-is-code/

Thanks for bringing up this issue. Immutability is an important 
concept in D.