ACTIONSCRIPT 3 Developer’s Guide en

ACTIONSCRIPT 3.0 DEVELOPER’S GUIDE
Working with strings
Converting strings between uppercase and lowercase
Flash Player 9 and later, Adobe AIR 1.0 and later
As the following example shows, the toLowerCase() method and the toUpperCase() method convert alphabetical
characters in the string to lowercase and uppercase, respectively:
var str:String = "Dr. Bob Roberts, #9."
trace(str.toLowerCase()); // dr. bob roberts, #9.
trace(str.toUpperCase()); // DR. BOB ROBERTS, #9.
After these methods are executed, the source string remains unchanged. To transform the source string, use the
following code:
str = str.toUpperCase();
These methods work with extended characters, not simply a–z and A–Z:
var str:String = "José Barça";
trace(str.toUpperCase(), str.toLowerCase()); // JOSÉ BARÇA josé barça
Strings example: ASCII art
Flash Player 9 and later, Adobe AIR 1.0 and later
This ASCII Art example shows a number of features of working with the String class in ActionScript 3.0, including the
following:
The split() method of the String class is used to extract values from a character-delimited string (image
information in a tab-delimited text file).
Several string-manipulation techniques, including split(), concatenation, and extracting a portion of the string
using substring() and substr(), are used to capitalize the first letter of each word in the image titles.
The getCharAt() method is used to get a single character from a string (to determine the ASCII character
corresponding to a grayscale bitmap value).
String concatenation is used to build up the ASCII art representation of an image one character at a time.
The term ASCII art refers to a text representations of an image, in which a grid of monospaced font characters, such
as Courier New characters, plots the image. The following image shows an example of ASCII art produced by the
application:
Last updated 6/6/2012
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