Command Line Flags in ActionScript

ActionScript doesn’t have built-in command-line flag parsing like Go’s flag package. However, we can implement a simple command-line argument parser to demonstrate a similar concept. Here’s an example of how you might implement command-line flags in ActionScript:

package {
    import flash.display.Sprite;
    import flash.system.System;

    public class CommandLineFlags extends Sprite {
        private var wordValue:String = "foo";
        private var numbValue:int = 42;
        private var forkValue:Boolean = false;
        private var svarValue:String = "bar";

        public function CommandLineFlags() {
            parseArguments();
            printValues();
        }

        private function parseArguments():void {
            var args:Array = System.argv;
            for (var i:int = 0; i < args.length; i++) {
                var arg:String = args[i];
                if (arg.indexOf("--word=") == 0) {
                    wordValue = arg.split("=")[1];
                } else if (arg.indexOf("--numb=") == 0) {
                    numbValue = int(arg.split("=")[1]);
                } else if (arg == "--fork") {
                    forkValue = true;
                } else if (arg.indexOf("--svar=") == 0) {
                    svarValue = arg.split("=")[1];
                }
            }
        }

        private function printValues():void {
            trace("word:", wordValue);
            trace("numb:", numbValue);
            trace("fork:", forkValue);
            trace("svar:", svarValue);
            trace("tail:", System.argv.slice(4));
        }
    }
}

To use this program, you would compile it into a SWF file and run it using the Flash Player debugger or AIR runtime, passing command-line arguments.

For example:

$ adl application.xml -- --word=opt --numb=7 --fork --svar=flag
word: opt
numb: 7
fork: true
svar: flag
tail: []

Note that ActionScript doesn’t have a built-in way to generate help text or handle unknown flags automatically. You would need to implement these features manually if needed.

Also, keep in mind that running ActionScript applications with command-line arguments typically requires using the AIR runtime or Flash Player debugger, as standard web browsers don’t provide access to command-line arguments for security reasons.

This example demonstrates a basic approach to handling command-line style arguments in ActionScript, but it doesn’t provide the full flexibility and robustness of Go’s flag package. In real-world ActionScript applications, especially those targeting the web, you would typically use other methods for configuration, such as external configuration files or URL parameters.

Command Line Arguments in ActionScript

Command Line Subcommands in ActionScript

Learn X By Example

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Command Line Flags in ActionScript