Movement of a player

Just my way to adjust player view depends on keys pressed.
That are indexes of our angles:

// let's define keys, which will move player (keyCode, state)

private static var keys:Array<Array<Int>> = [[37,0],[39,0],[38,0],[40,0],[69,0],[65,0],[68,0],[87,0],[83,0]];
// define array, where angles will be stored
private var angles:Array<Int>;
// adjust angles to special indexes

private function Init(e:Event):Void // Event.ADDED_TO_STAGE
{
    angles = new Array<Int>();
    angles[1] = 0;
    angles[3] = 45;
    angles[2] = 90;
    angles[6] = 135;
    angles[4] = 180;
    angles[11] = 225;
    angles[7] = 270;
    angles[8] = 315;
}


public function on_key_down(e:KeyboardEvent):Void // KeyboardEvent.KEY_DOWN
{
    for(key in keys)
        if(e.keyCode == key[0] && key[1] == 0)
            key[1] = 1;
}

public function on_key_up(e:KeyboardEvent):Void // KeyboardEvent.KEY_UP
{
    for(key in keys)
        if(e.keyCode == key[0])
            key[1] = 0;
}



public function on_enter_frame(e:Event):Void // Event.ENTER_FRAME
{
    var r_index:Int = 0;
    // up - down
    if(keys[2][1] == 1 || keys[7][1] == 1) {
        r_index += 1;
    }else if(keys[3][1] == 1 || keys[8][1] == 1){
        r_index += 4;
    }
    // left - right
    if(keys[0][1] == 1 || keys[5][1] == 1)
    {
        r_index += 7;
    }else if(keys[1][1] == 1 || keys[6][1] == 1){
        r_index +=2;
    }
    if(r_index != 0)
        this.rotation = angles[r_index];
}

What is pros of that way for me:

- you can define not only array of angles, but array of Bitmaps or Sprites

- you can redefine array of angles (Sprites) on the way without any of code overhead

- cleaner code as for me (just two if - else)