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Page 43: Replacing the Conditional Logic on Price Code with Polymorphism (added RegularPrice.charge and implemented in Movie.charge)

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Lines changed: 6 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -23,8 +23,7 @@ def charge(days_rented)`
`23`	`23`	`result = 0`
`24`	`24`	`case price_code`
`25`	`25`	`when Movie::REGULAR`
`26`		`- result += 2`
`27`		`- result += (days_rented - 2) * 1.5 if days_rented > 2`
	`26`	`+ return @price.charge(days_rented)`
`28`	`27`	`when Movie::NEW_RELEASE`
`29`	`28`	`result += days_rented * 3`
`30`	`29`	`when Movie::CHILDRENS`
`@@ -40,6 +39,11 @@ def frequent_renter_points(days_rented)`
`40`	`39`	`end`
`41`	`40`
`42`	`41`	`class RegularPrice`
	`42`	`+ def charge(days_rented)`
	`43`	`+ result = 2`
	`44`	`+ result += (days_rented - 2) * 1.5 if days_rented > 2`
	`45`	`+ result`
	`46`	`+ end`
`43`	`47`	`end`
`44`	`48`
`45`	`49`	`class NewReleasePrice`

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