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Ilya Kantor 2017-03-19 17:09:37 +03:00
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1-js/07-object-inheritance/08-class-patterns/article.md
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@ -9,7 +9,7 @@ There's a special syntax construct and a keyword `class` in JavaScript. But befo
In JavaScript there are several well-known programming patterns to make classes even without using the `class` keyword. And here we'll talk about them first.
The `class` construct will be described in the next chapter, but in Javascript it's a "syntax sugar" and an extension of one of the patterns that we'll study here.
The `class` construct will be described in the next chapter, but in JavaScript it's a "syntax sugar" and an extension of one of the patterns that we'll study here.
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@ -108,7 +108,7 @@ We already can see benefits over the functional pattern:
So the prototypal pattern is more memory-efficient.
...But not only that. Prototypes allow us to setup the inheritance, precisely the same way as built-in Javascript constructors do. Functional pattern allows to wrap a function into another function, and kind-of emulate inheritance this way, but that's far less effective, so here we won't go into details to save our time.
...But not only that. Prototypes allow us to setup the inheritance, precisely the same way as built-in JavaScript constructors do. Functional pattern allows to wrap a function into another function, and kind-of emulate inheritance this way, but that's far less effective, so here we won't go into details to save our time.
## Prototype-based inheritance for classes
@ -200,7 +200,7 @@ Here's what the code does:
## Summary
The term "class" comes from the object-oriented programming. In Javascript it usually means the functional class pattern or the prototypal pattern. The prototypal pattern is more powerful and memory-efficient, so it's recommended to stick to it.
The term "class" comes from the object-oriented programming. In JavaScript it usually means the functional class pattern or the prototypal pattern. The prototypal pattern is more powerful and memory-efficient, so it's recommended to stick to it.
According to the prototypal pattern:
1. Methods are stored in `Class.prototype`.