Changes for page Code Example: Data Structure Style vs. Object Style

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...	...	@@ -1,14 +1,21 @@
	1	+### Use Cases
	2	+
	3	+This example is intended to demonstrate the extensibility differences between data structures and objects by extending them with
	4	+
	5	+1. an Area() function (extending behavior)
	6	+1. a rectangle type (extending data type)
	7	+
1	1	### Data Structure Style
2	2
3		- type Square struct {
	10	+ struct Square {
4	4	length float
5	5	}
6	6
7		- type Circle struct {
	14	+ struct Circle {
8	8	radius float
9	9	}
10	10
11		- func Circumference(g Object) float {
	18	+ function Circumference(g Object) float {
12	12	switch type(g):
13	13	case Square:
14	14	return 4 * g.length
...	...	@@ -16,8 +16,11 @@
16	16	return 2 * PI * g.radius
17	17	}
18	18
19		-*
	26	+1. Adding a function Area() with the same anatomy as Circumference() is easy, since it only requires adding new code.
	27	+1. Adding a new datatype, Rectangle, is more difficult because it requires touching existing code, namely any functions like Circumference() or Area() that need to be enabled handle this datatype.
20	20
	29	+####
	30	+
21	21	#### Object-Oriented Style
22	22
23	23	interface GeometricObject {