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28 Cards in this Set
- Front
- Back
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Alice
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A programming language that allows users with little or no computer experience to program characters and objects in a virtual world.
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Computer Program
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A step-by-step set of instructions telling a computer how to perform a specific task
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Properties
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The data that represents an object (Ex: Teacher, Properties: arms, legs, shoes, hair)
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Methods
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The programs that manipulate the properties of an object (Ex: Object: Teacher, Methods: arms up, arms down, head tilt)
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Object
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A collection of properties and methods that are used to manipulate the properties (Ex: Teacher)
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State
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The values stored in the properties of an object at any one time (Ex: Object: Teacher, Properties: Face, Value: Happy or sad)
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Class of objects
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A set of similar objects that each have the same properties and methods (Ex: Class: People, Subclasses: Students and teacher)
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Instance
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Each individual object of a class (Ex: Class: People, Instance: students and teacher)
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Instantiation
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The process of adding an individual object to a world. (Ex: World: Classroom, Instantiation: Students or teacher entering classroom)
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Object-Oriented Program
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(OOP) A modern computer programming language in which programs are organized into a set of methods that manipulate the properties of objects stored in the computer.
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IDE
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(Integrated Development Environment) A computer program that is used to facilitate the writing of other computer programs. This IDE is often called the Alice Interface.
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World Window
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A window in Alice that contains a view of the current Alice world.
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Tilt control
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The curved arrow on the bottom right of the World Window that tilts the camera.
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Zoom/Pan Control
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The bottom center control that can zoom in and out and pan left and right.
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Pan
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Moving the camera left or right without moving the position of the camera.
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Move control
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Moves the camera left, right, up, and down.
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Object Tree
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Shows the objects in the current Alice world organized in a tree of tiles.
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Tiles
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A tile represents each object. Four object tiles appear in every Alice world: World, Camera, Light, and Ground.
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Details area
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Located below the Object Tree and has tabs to show properties, methods, and functions for an Alice object.
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Function
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A method that computes and returns a value.
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Primitive Methods
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Provide basic behaviors for objects.
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Encapsulated methods
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Can be used over and over again with other programs but they can’t be changed because their details are hidden from the programmer. These are common methods.
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Editor Area
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Methods are assembled by clicking and dragging tiles from other parts of the interface. The bottom area has a row of logic and control tiles that are used for branching, looping, and other logical structures
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Events Area
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The part of the interface that shows existing events and is used to create new events.
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Event
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Consists of a condition, called an event trigger, and the name of the method, called an event handler. (Ex: the skater turns when you press the “S” key. The “S” key is the event trigger; the event handler contains the methods for the spin.)
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Event-driven software
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Software with events, such as using the mouse and keyboard shortcuts in Microsoft World.
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Clipboard
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Used to copy instruction tiles in Alice methods
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Trash can
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Used to delete objects and instruction tiles.
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