MACROMEDIA FLASH MX 2004 - ACTIONSCRIPT

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246 Chapter 12: ActionScript Dictionary

Usage 1 and 2: The following example creates an array called employee_array and uses the

trace() action to send the elements to the Output panel. In the fourth line, an element in the

array is changed and the fifth line sends the newly modified array to the Output panel:

employee_array = ["Barbara", "George", "Mary"];

trace(employee_array);

// Barbara, George, Mary

employee_array[2]="Sam";

trace(employee_array);

// Barbara, George, Sam

Usage 3: In the following example, the expression inside the brackets ("piece" + i) is evaluated

and the result is used as the name of the variable to be retrieved from the

my_mc movie clip. In this

example, the variable

i must live on the same Timeline as the button. If the variable i is

equal to 5, for example, the value of the variable

piece5 in the my_mc movie clip will be displayed

in the Output panel:

on(release){

x = my_mc["piece"+i];

trace(x);

}

Usage 3: In the following code, the expression inside the brackets is evaluated and the result is

used as the name of the variable to be retrieved from movie clip

name_mc:

name_mc["A" + i];

If you are familiar with the Flash 4 ActionScript slash syntax, you can use the eval function to

accomplish the same result:

eval("name.A" & i);

Usage 3: You can also use the array access operator on the left side of an assignment statement to

dynamically set instance, variable, and object names:

name[index] = "Gary";

MACROMEDIA FLASH MX 2004 - ACTIONSCRIPT - Page 246