Actionscript 3 equivalent of PHP's print_r

Here's a handy little function for easing the development process with Actionscript 3 in Flex and Flash: an equivalent of PHP's recursive print function print_r, which displays objects and arrays in a way that's readable by humans.

Code for Flex:

```
import mx.controls.Alert;
```
```
 
```

public function pr(obj:*, level:int = 0, output:String = ""):* {

```
    var tabs:String = "";
```

    for(var i:int = 0; i < level; i++, tabs += "\t");

```
    
```
```
    for(var child:* in obj){
```

        output += tabs +"["+ child +"] => "+ obj[child];

```
        
```

        var childOutput:String = pr(obj[child], level+1);

        if(childOutput != '') output += ' {\n'+ childOutput + tabs +'}';

```
        
```
```
        output += "\n";
```
```
    }
```
```
    
```

    if(level == 0) Alert.show(output);

```
    else return output;
```
```
}
```
```
 
```
```
public function test():void {
```
```
    var obj:Object = new Object();
```
```
    obj.var1 = "test";
```

    obj.var2 = { var2a: "a", var2b: 10 }

```
    
```
```
    pr(obj);
```
```
    pr([ "a", "b", "c" ]);
```
```
}
```

Code for Flash:

function pr(obj:*, level:int = 0, output:String = ""):* {

```
    var tabs:String = "";
```

    for(var i:int = 0; i < level; i++, tabs += "\t");

```
    
```
```
    for(var child:* in obj){
```

        output += tabs +"["+ child +"] => "+ obj[child];

```
        
```

        var childOutput:String = pr(obj[child], level+1);

        if(childOutput != '') output += ' {\n'+ childOutput + tabs +'}';

```
        
```
```
        output += "\n";
```
```
    }
```
```
    
```
```
    if(level == 0) trace(output);
```
```
    else return output;
```
```
}
```
```
 
```
```
//Test
```
```
var obj:Object = new Object();
```
```
obj.var1 = "test";
```
```
obj.var2 = { var2a: "a", var2b: 10 }
```
```
 
```
```
pr(obj);
```
```
pr([ "a", "b", "c" ]);
```

Both tests will display:

```
[var1] => test
```
```
[var2] => [object Object] {
```
```
    [var2b] => 10
```
```
    [var2a] => a
```
```
}
```
```
 
```
```
[0] => a
```
```
[1] => b
```
```
[2] => c
```

Tags:

flash, actionscript, flex, 3, as3, recursive, print

rcz •

Oct 14, 2008 •

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Actionscript 3 equivalent of PHP's print_r

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