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-rw-r--r--julia.html.markdown71
1 files changed, 28 insertions, 43 deletions
diff --git a/julia.html.markdown b/julia.html.markdown
index d54e7d0e..e18fc3cd 100644
--- a/julia.html.markdown
+++ b/julia.html.markdown
@@ -397,61 +397,46 @@ filter(x -> x > 5, [3, 4, 5, 6, 7]) #=> [6, 7]
[add_10(i) for i=[1, 2, 3]] #=> [11, 12, 13]
[add_10(i) for i in [1, 2, 3]] #=> [11, 12, 13]
-####
-#### In progress point
-####
-
####################################################
-## 5. Classes
+## 5. Types and Multiple-Dispatch
####################################################
-# We subclass from object to get a class.
-class Human(object):
-
- # A class attribute. It is shared by all instances of this class
- species = "H. sapiens"
-
- # Basic initializer
- def __init__(self, name):
- # Assign the argument to the instance's name attribute
- self.name = name
-
- # An instance method. All methods take self as the first argument
- def say(self, msg):
- return "%s: %s" % (self.name, msg)
-
- # A class method is shared among all instances
- # They are called with the calling class as the first argument
- @classmethod
- def get_species(cls):
- return cls.species
+# Type definition
+type Tiger
+ taillength::Float64
+ coatcolor # no type annotation is implicitly Any
+end
+# default constructor is the properties in order
+# so, Tiger(taillength,coatcolor)
- # A static method is called without a class or instance reference
- @staticmethod
- def grunt():
- return "*grunt*"
+# Type instantiation
+tigger = Tiger(3.5,"orange") # the type doubles as the constructor function
+# Abtract Types
+abstract Cat # just a name and point in the type hierarchy
-# Instantiate a class
-i = Human(name="Ian")
-print i.say("hi") # prints out "Ian: hi"
+# types defined with the type keyword are concrete types; they can be instantiated
+# types defined with the abstract keyword are abstract types; they can have subtypes
+# each type has one supertype; a supertype can have zero or more subtypes.
-j = Human("Joel")
-print j.say("hello") #prints out "Joel: hello"
+type Lion <: Cat # Lion is a subtype of Cat
+ mane_color
+ roar::String
+end
-# Call our class method
-i.get_species() #=> "H. sapiens"
+type Panther <: Cat # Panther is also a subtype of Cat
+ eye_color
+ Panther() = new("green") # Panthers will only have this constructor, and no default constructor.
+end
-# Change the shared attribute
-Human.species = "H. neanderthalensis"
-i.get_species() #=> "H. neanderthalensis"
-j.get_species() #=> "H. neanderthalensis"
+####
+#### In progress point
+####
-# Call the static method
-Human.grunt() #=> "*grunt*"
-```
+#### Multiple Dispatch
## Further Reading
+#### Link to Maunual
Still up for more? Try [Learn Python The Hard Way](http://learnpythonthehardway.org/book/)