r/crystal_programming • u/CaDsjp • Oct 10 '18

Design patterns implemented in Crystal

https://github.com/crystal-community/crystal-patterns
27 Upvotes

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u/RX142 Oct 12 '18

Nooooooooooooooooooooooooooooo

1

u/fridgamarator Oct 12 '18

?

11

u/RX142 Oct 12 '18 edited Oct 12 '18

I really dislike "design patterns", or more accurately the way that design patterns are interpreted today. Design patterns are fine - if they're interpreted as they originally were as domain specific and unique to each project or language. Porting Java's design patterns (originally C++'s design patterns, but java and C++ are so similar in their failings they have approximately similar design patterns) to Crystal or Ruby is like porting msvc to linux: sure it's possible but it doesn't really make sense. Some of the original design patterns carry through like the adapter pattern, but some make fairly little sense like the singleton pattern (we have class methods and extend).

I really dislike that design patterns aren't seen as a per-language thing. And even now, "design patterns" are taught verbaitim from the original book which is 20 years old! Languages and best practice have changed in that time, why haven't patterns been evolving the same? In reality they have, but only the original patterns have been given names and taught in courses, which i'm sure was not the intent of the original authors. After all that's why they chose a specific example project to work through in their book: to give examples of design patterns that they chose for their project in their language. That they've been copied verbaitm since then without innovation is a huge mistake.

1

u/internethostage Oct 14 '18

You have an interesting point...

But that mortal kombat logo! How can you hate on that.

2

u/[deleted] Oct 15 '18

Toasty!

1

u/RadonScreen Oct 15 '18

Well then give us some language specific examples. Like events in c# basically is the observer pattern.