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Working with arrays

From: Flash CS3 Professional Beyond the Basics

Video: Working with arrays

Another important part of ActionScript 3.0 is something called an array. In this movie we'll talk about arrays and how to create them and work with them in Flash. If you're following along and working in 05_arrays.fla in the Chapter 02 folder in the Exercise Files folder. You can also just create a blank document and rename layer one to actions. So let's select the first keyframe of actions layer and open up the Actions panel. To do that press Option+F9 on the Mac, or F9 on the PC. And now in the Actions panel let's create an array. To create an array type var and then space.

Working with arrays

Another important part of ActionScript 3.0 is something called an array. In this movie we'll talk about arrays and how to create them and work with them in Flash. If you're following along and working in 05_arrays.fla in the Chapter 02 folder in the Exercise Files folder. You can also just create a blank document and rename layer one to actions. So let's select the first keyframe of actions layer and open up the Actions panel. To do that press Option+F9 on the Mac, or F9 on the PC. And now in the Actions panel let's create an array. To create an array type var and then space.

And that will create a variable to hold our array. Now we'll create a name for our array. I'm going to call my array my_ary. Set the data type using a colon to Array with a capital A. I'll set that equal to a new array by using shorthand notation. Remember the shorthand notation to create an array is using square brackets. Inside of the square brackets I'm going to type the values of my array and I'll separate the values with commas. The date inside of an array can be one data type or multiple data types. It doesn't matter what type of data is inside the array.

For example, the first value in my array can be 5, a number. The second value can be my name, Todd, in quotes. Remember quotes in Flash indicate a string. A string is a text value So a comma, and the next value we'll do a boolean value. Remember boolean is true or false. The value we'll pass then is true. Remember that's not in quotes because it's not a string but a true or false value. So there's a look at creating an array. But what if wanted to access the data inside of the array. Remember that each item in an array has an index number.

In Flash an array index starts at zero and then one and two and so on. So the number five in here would be my array index zero. The text value Todd, would be my array index one. And true would be my array index 2. Let's go to the next line and talk about how to access data in an array. I'm going to type trace and parentheses and a semicolon to end the statement. Inside of the parentheses I'm going to trace the value my_ary(1) index one. Now to tell Flash I'm going to reference an index of an array I use square brackets.

The value that you pass into the square brackets, represents the index of the array that you want to reference. So I'm tracing my array index one, which when I test the movie should give me a value of Todd. So let's test the movie and make sure it works. Command+Return on the Mac, Ctrl+Enter on the PC. And there's Todd in the Output window. I'm going to close the Output window, and the Flash player window. And there's a look at creating and working with an array.

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This video is part of

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Flash CS3 Professional Beyond the Basics

79 video lessons · 25618 viewers

Todd Perkins
Author

 
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  1. 3m 30s
    1. Welcome
      1m 20s
    2. Getting the most from this training
      1m 20s
    3. Using the exercise files
      50s
  2. 15m 28s
    1. Managing digital assets
      4m 9s
    2. Creating custom keyboard shortcuts
      5m 1s
    3. Creating custom color swatches
      3m 41s
    4. Creating a custom template
      2m 37s
  3. 14m 38s
    1. Working with variables
      3m 41s
    2. Using functions
      3m 30s
    3. Working with events
      2m 11s
    4. Using event listeners
      2m 42s
    5. Working with arrays
      2m 34s
  4. 29m 41s
    1. Understanding dynamic text fields
      2m 37s
    2. Loading text from an external file
      6m 42s
    3. Reading HTML from a text field
      5m 29s
    4. Applying CSS with ActionScript
      7m 0s
    5. Applying external CSS to a text field
      7m 53s
  5. 45m 27s
    1. Masking dynamic text
      4m 59s
    2. Dragging the Scroll Bar
      7m 3s
    3. Calculating a scroll percent
      5m 20s
    4. Setting scroll boundaries
      4m 9s
    5. Connecting the ScrollBar to the text field
      2m 55s
    6. Easing the text with the ScrollBar
      4m 12s
    7. Scrolling the text with buttons
      2m 38s
    8. Animating the scrolling text with the buttons
      4m 26s
    9. Setting boundaries for the scrolling text
      4m 26s
    10. Easing the text using the buttons
      1m 37s
    11. Connecting the ScrollBar to the Scroll buttons
      3m 42s
  6. 20m 46s
    1. Organizing a complex object into layers
      1m 51s
    2. Duplicating MovieClips
      1m 29s
    3. Undocking the timeline
      1m 20s
    4. Animating a complex MovieClip
      4m 36s
    5. Creating an animated Hinge effect
      5m 13s
    6. Creating complex animations
      6m 17s
  7. 28m 1s
    1. Controlling objects with buttons
      4m 6s
    2. Understanding frame labels
      3m 25s
    3. Using buttons to navigate labeled frames
      2m 30s
    4. Nesting code within MovieClips
      5m 8s
    5. Adding sound to the application
      2m 34s
    6. Adding drag interactivity to the robot
      6m 1s
    7. Animating the dragged robot
      4m 17s
  8. 20m 3s
    1. Understanding components
      2m 30s
    2. Using components to setup a form
      3m 45s
    3. Setting up the form to send an email
      3m 38s
    4. Working with form variables
      6m 11s
    5. Skinning components
      3m 59s
  9. 27m 40s
    1. Using transparency in a video
      4m 16s
    2. Working with embedded video
      3m 38s
    3. Animating a VideoClip
      2m 53s
    4. Creating an advanced animation with video
      2m 40s
    5. Working with the bitmap data class
      3m 37s
    6. Working with the bitmap class
      1m 40s
    7. Copying the video to create a reflection
      1m 35s
    8. Reflecting the video
      2m 42s
    9. Enhancing a video reflection with a mask
      4m 39s
  10. 1h 38m
    1. Viewing the finished MP3 player
      1m 45s
    2. Understanding the project flow
      2m 52s
    3. Preparing to build the MP3 player
      5m 11s
    4. Understanding classes and packages
      5m 32s
    5. Creating the MP3 player class
      9m 59s
    6. Loading sounds from external files
      9m 20s
    7. Accessing ID3 tag information
      6m 11s
    8. Controlling sound playback with Play and Pause buttons
      11m 3s
    9. Changing tracks
      12m 1s
    10. Displaying the current volume
      9m 33s
    11. Changing the volume
      6m 40s
    12. Wiring the progress bar
      8m 4s
    13. Building the progress bar slider
      10m 4s
  11. 5m 36s
    1. Making Flash movies accessible
      1m 49s
    2. Adding a name and description to your Flash movie
      52s
    3. Accessibility and text fields
      2m 55s
  12. 12m 2s
    1. Understanding Flash Mobile
      35s
    2. Exploring Device Central
      1m 45s
    3. Updating Device Profiles
      1m 7s
    4. Creating a Flash file from Device Central
      2m 7s
    5. Creating and testing Flash Lite applications
      2m 48s
    6. Downloading the Flash Lite player for Windows Mobile
      1m 44s
    7. Getting a Flash Lite application onto your phone
      1m 56s
  13. 27s
    1. Goodbye
      27s

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