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Updated tutorial_gdscript_efficiently (markdown)

Juan Linietsky 2015-06-08 21:42:17 -03:00
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tutorial_gdscript_efficiently.md

@ -359,7 +359,7 @@ while(i<strings.size()):
### Duck Typing
One of the most difficult concepts to grasp when moving from a statically typed language to a dynamic one is Duck Typing. Duck typing makes overall code design much simpler and straightforward to write, but it's not obvious how it work.
One of the most difficult concepts to grasp when moving from a statically typed language to a dynamic one is Duck Typing. Duck typing makes overall code design much simpler and straightforward to write, but it's not obvious how it works.
As an example, imagine a situation where a big rock is falling down a tunnel, smashing everything on it's way. The code for the rock, in a statically typed language would be something like:
@ -383,7 +383,11 @@ And that's it. If the object that hit the big rock has a smash() method, it will
_"When I see a bird that walks like a duck and swims like a duck and quacks like a duck, I call that bird a duck"_
In this case, though, there exists the possibility of the object being hit not having a smash() function. Some dynamically typed languages simply ignore a method call when it doesn't exist (like Objective C). GDScript is more strict, so checking if the function exists is desirable:
In this case, it translates to:
_"If the object can be smashed, I don't care what it is, just smash it"
Yes, we should call it Hulk typing instead. Anyway though, there exists the possibility of the object being hit not having a smash() function. Some dynamically typed languages simply ignore a method call when it doesn't exist (like Objective C), but GDScript is more strict, so checking if the function exists is desirable:
```python
func _on_object_hit(object):