Columbia College Chicago
Programming for Interactive Multimedia I

Review for Test 4

Here are the concepts and terms you need to know, and examples the types of questions that I may use to test what you know. Be ready to comment, debug and write scripts!

THE STUFF YOU NEED TO KNOW

I. Lists

• defining a linear list: myList = [item1, "item 2", #item3] --this contains a variable, a string and a symbol, but it can contain any combination from all of one type to all different types
• defining a property list: myPropList = [#item1:"property1", #item2:#property2, #item3:7]
  --here again property types can be the same or different.
• accessing a list: myList[3], myList.getAt[3], myList.getOne[#item3], myList.getProp[3], myList.getProp[#item3]
• adding to a list: myList.add(value), myList.append(value), myList.addAt(index, value), myPropList.addProp(#indentifyer:value)
• deleting from a list: myList.deleteAt(index), myList.deleteOne(value), myPropList.deleteProp(value)
• myList = myList.sort --or--sort(myList)
• listLength = myList.count --or-- listLength = count(myList)
• using getPropertyDescription list--what are the paramenters (#comment, #format, #range, #default)

II. Parent/Child Lingo

• defining an object--the "on new me . . .return me . . . end" handler
• defining a child--child1 = new(script "myParentScript", property1, property2)--you must "save" the child in a variable, and if you want to keep track of all of the parent's children you'll need to create a list of those objects
• accessing the property of a child object -- currentName = thisChild.theName
• relationship between parent and child objects: the parent defines the properties and handlers of an object, the child is an instance of that object that contains specific values for the properties and calls the handlers.

POSSIBLE QUESTIONS

I. Writing Code (just lines or code, not entire scripts)

Create a list that contains the following items: "banana", "apple", "strawberry", "kiwi"
--answer myFruits = ["banana", "apple", "strawberry", "kiwi"]
Save the value of the third item in the list in a variable called thisFruit
--answer thisFruit = myFruits[3]
Create an empty linear list
--answer myList = [ ]
Save the value of the thisName property of a child object named child1 in a variable
--answer currentName = child1.thisName

II. Debugging code

on mouseEnter me
thisFruit = myFruits.getOne(3)
end mouseEnteranswer--line 2 should read thisFruit = myFruits.getAt(3) or thisFruit = myFruits[3]

property thisName, thisAge
on new me, myName, myAge
me.thisName = myName
me.thisAge = myAge
end
answer --you need to add the line "return me" before you end the handler

III. Identification/fill in the blanks (I'll give you a list of words to choose from)

In the "on getPropertyDescriptionList" handler, you create a _______________ list.
--answer "propery" list

In the Lingo code "myFruits[3]", "3" represents the ____________ of the element.
--answer "index"

The properties of a custom object in Lingo is defined in a ____________ script.
--answer "parent"

Parent objects can define ___________________ and/or ____________________.
--answer "properties", "handlers"

EXTRA CREDIT

What is the scope of the properties in getPropertyDescriptionList? What is the scope of the properties defined in parent/child Lingo?

If I want to create a slider for values between 1 and 20 in my getPropertyDescriptionList, how do I script the #range property? If I want to give the user a choice of three items in a dropdown box, how do I script the #range property?

References:

Chapters 16, 19 and Lingo Lexicon in Director 8 Demystified, class handout on list syntax

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