[ADD] Type Hierarchy

09_TypeHierarchiesMultipleDispatch.jl

@@ -0,0 +1,49 @@
+println(typeof(3))
+
+telltype(x) = "Unknown type"
+
+println(telltype(2))
+
+telltype(x::Integer) = "Integer type"
+
+telltype(::AbstractFloat) = "Floatingpoint type"
+
+println(telltype("a"))
+
+println(telltype(2))
+
+println(telltype(2.0))
+
+telltype(::Int64) = "64 bit integer"
+
+println(telltype(1))
+
+countargs(a) = "one"
+
+countargs(a,b) = "two"
+
+countargs(a,b,c) = "three"
+
+println(countargs(1))
+
+println(countargs(1,2))
+
+println(countargs(1,2,3))
+
+println(countargs("abc",2))
+
+foo(a,b) = "Two variables"
+
+foo(a::Integer,b::Integer) = "Two integers"
+
+foo(a::Integer,b::AbstractFloat) = "An integer and a float"
+
+foo(a::AbstractFloat,b::Integer) = "A float and a integer"
+
+println(foo('a',1))
+
+println(foo(2,1))
+
+println(foo(2.0,1))
+
+println(foo(2,1.1))