快學Scala習題解答 第六章 物件

object

conversions
defgallonstoliters(){}
defmilestokilometers(){}
}

abstract

class
unitconversion
defgallonstoliters(){}
defmilestokilometers(){}
}object
inchestocentimeters
extends
unitconversion
}object
gallonstoliters
extends
unitconversion
}object
milestokilometers
extends
unitconversion
}

point中的getlocation方法返回的是point物件，如果想返回origin物件，需要origin類才行

object

origin
extends
point
with
override
defgetlocation: point = super.getlocation
origin.move(2,3)
println(origin.tostring)
}

class

point(x:int,y:int)
object
point
extends
defnew point(x,y)
} val
p = point(1,2)
println(p)
}

object

reverse
extends
args.reverse.foreach(arg => print(arg + " "))
}

object

card
extends
enumeration
with
valm = value("♣")
valt = value("♠")
valh = value("♥")
valf = value("♦")
println(card.m)
println(card.t)
println(card.h)
println(card.f)
}

object

card
extends
enumeration
with
valm = value("♣")
valt = value("♠")
valh = value("♥")
valf = value("♦")
defcolor(c:card.value)
color(card.h)
}

object

rgbextends
enumeration
with
valred = value(0xff0000,"red")
valblack = value(0x000000,"black")
valgreen = value(0x00ff00,"green")
valcyan = value(0x00ffff,"cyan")
valyellow = value(0xffff00,"yellow")
valwhite = value(0xffffff,"white")
valblue = value(0x0000ff,"blue")
valmagenta = value(0xff00ff,"magenta")
}

blog url:

《快學Scala》第六章習題解答

rt。package com.scalalearn.scala.main 快學scala 06習題 1.編寫乙個conversions物件，加入inchestocentimeters,gallonstoliters和milestokilometers方法 object conversions def...

第六章習題

r1.個無線網路執行在 基礎設施模式 下是什麼含義？如果某網路沒有執行在基礎設施模式下，那麼它執行在什麼模式下？這種執行模式與基礎設施模式之間有什麼不同？在基礎結構操作模式下，每個無線主機都通過基站連線到較大的網路。如果未在基礎架構模式下執行，則網路將在臨時模式下執行。在自組織模式下，無基站，節點僅...

第六章解答題

begin transaction declare errorsum int declare rid varchar 50 declare bid varchar 50 select rid rid from reader where rname 張無忌 select bid bid from bo...