Arrays: Working with lists of objects

Unit IV: Advanced Techniques

An array is a list. When you declare a variable in Alice, you can select to make it an array.

In this lesson, you will declare and use arrays. An array is a variable that is a list.
You will create arrays of words, numbers, or objects, then use loops to process the entire array.

Goals:

• Learn to declare and use arrays (lists);
• Understand how arrays can act on groups of objects together;
• Learn to create array of different types, including objects;
• Use the control structures that operate on arrays;
• Define parallel arrays and name ways to use them;
• Be able to use arrays of segments.

Objectives:

• Declare a variable to be an array;
• Create code to assign initial values to an array;
• Use subscripts or index to access the elements of the array;
• Utilize loop control structures to process all of the elements of the array;
• Create and process arrays of different data types, including arrays of objects;
• Understand the purpose of parallel arrays and ways to use them;
• Experiment with arrays of segments.

Please study the material at each of the links below.

1. Arrays: Ready, Set, Go!: Tortoise says "Ready", "Set", "Go" using array
2. An array of animals: An array of SJointedModel contains, yeti, tortoise and stuffedTiger
3. The animals talk: Parallel Arrays: One array contains animals, the other the things they say
4. Who's the tallest?: People are in an array, a loop is used to find the tallest.
5. Animals counting: An array of animals take turns to count
6. Birds spread wings and say something: An array of birds perform
7. Fish swim to cave with procedure: Each fish swims to cave with procedure
8. Array of Objects: An array is madeup of different classes
9. Segments of an elephant's trunk as an array: The segments of an elephant's trunk, tail and a few other things are an array.
10. Self-Study Questions: What have you learned?
11. Active Learning: Arrays: Show what have you learned
12. Complete Step 6: Scene Procedures for the final project.
13. Discussion questions: What do you think?

Glossary for arrays lesson
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