首字母大写为原型类，小写为对象

Io 20110905

Io> "HI" println

HI

==> HI

Io> Vehicle := Object clone

==> Vehicle_0x2458300:

type = "Vehicle"

Io> Vehicle description := "someting to take you places"

==> someting to take you places

Io> Vehicle description

==> someting to take you places

Io> Vehicle slotNames

==> list(description, type)

Io> Vehicle type

==> Vehicle

Io> Object type

==> Object

Io> Car := Vehicle clone

==> Car_0x222e560:

type = "Car"

Io> Car slotNames

==> list(type)

Io> Car type

==> Car

Io> Car Description

Exception: Car does not respond to 'Description'

---------

Car Description Command Line 1

Io> Car description

==> someting to take you places

Io> ferrari := Car clone

==> Car_0x234bb88:

Io> ferrari slotNames

==> list()

Io> ferrari type

==> Car

方法

Io> method("So, you've come for an argument." println)

==> method(

"So, you've come for an argument." println

)

Io> method type

==> Block

Io> Car drive := method("Vroom" println)

==> method(

"Vroom" println

)

Io> ferrari drive

Vroom

==> Vroom

Io> ferrari proto

==> Car_0x222e560:

drive = method(...)

type = "Car"

Lobby

Io> Lobby

==> Object_0x2176878:

Car = Car_0x222e560

Lobby = Object_0x2176878

Protos = Object_0x2176818

Vehicle = Vehicle_0x2458300

_ = Object_0x2176878

exit = method(...)

ferrari = Car_0x234bb88

forward = method(...)

set_ = method(...)

列表list和映射map

Io> toDos := list("find my car","find Continuum Transfunctioner")

==> list(find my car, find Continuum Transfunctioner)

Io> toDos size

==> 2

Io> toDos append("Find a present")

==> list(find my car, find Continuum Transfunctioner, Find a present)

Io> demoList := list(1,2,3,4)

==> list(1, 2, 3, 4)

Io> demoList average

==> 2.5

Io> demoList sum

==> 10

Io> demoList at(1)

==> 2

Io> demoList append(4)

==> list(1, 2, 3, 4, 4)

Io> demoList prepend(0)

==> list(0, 1, 2, 3, 4, 4)

Io> demoList isEmpty

==> false

Io> elvis := Map clone

==> Map_0x21dd5c8:

Io> elvis atPut("home","Graceland")

==> Map_0x21dd5c8:

Io> elvis at("home")

==> Graceland

Io> elvis atPut("style","rock and roll")

==> Map_0x21dd5c8:

Io> elvis asObject

==> Object_0x24df5a0:

home = "Graceland"

style = "rock and roll"

Io> elvis asList

==> list(list(home, Graceland), list(style, rock and roll))

Io> elvis keys

==> list(home, style)

Io> elvis size

==> 2

 

单例

Io> true clone

==> true

Io> false clone

==> false

Io> nil clone

==> nil

Io> Highlander := Object clone

==> Highlander_0x24e92f0:

type = "Highlander"

Io> Highlander clone := Highlander

==> Highlander_0x24e92f0:

clone = Highlander_0x24e92f0

type = "Highlander"

Io> Highlander clone

==> Highlander_0x24e92f0:

clone = Highlander_0x24e92f0

type = "Highlander"

Io> fred := Highlander clone

==> Highlander_0x24e92f0:

clone = Highlander_0x24e92f0

type = "Highlander"

Io> mike :=Highlander clone

==> Highlander_0x24e92f0:

clone = Highlander_0x24e92f0

type = "Highlander"

Io> fred == mike

==> true