Wiki source code of Code Example: Data Structure Style vs. Object Style

Version 2.4 by chrisby on 2024/03/03 14:45

version	line-number	content
2.4	1	### Data Structure Style
2.1	2
2.4	3	type Square struct {
	4	length float
	5	}
	6
	7	type Circle struct {
	8	length float
	9	}
	10
	11	func Area(g GeometricObject) float {
	12	switch (g.type()):
	13	case Circle:
	14	return
	15	case Square:
	16	return ...
	17	}
	18
	19	func Circumference(g GeometricObject) float {
	20	...
	21	}
2.1	22
2.3	23	#### Object-Oriented Style
2.2	24
2.3	25	class Square {
	26	length float
	27
	28	constructor(length float) {
	29	this.length = length
	30	}
	31
	32	func Area() float {
	33	return this.length * this.length
	34	}
	35
	36	func Circumference() float {
	37	return 4 * this.length
	38	}
	39	}
	40
	41	class Circle {
	42	radius float
	43
	44	constructor(radius float) {
	45	this.radius = radius
	46	}
	47
	48	func Area() float {
	49	return PI * this.radius * this.radius
	50	}
	51
	52	func Circumference() float {
	53	return 2 * PI * this.radius
	54	}
	55	}