ActionScript 3 版 print_r

Date
2007-07-25 (Wed)
Category
AIR / ActionScript

オールドスクール開発で、print debug はかかせません。そして php で育った僕には、print_r みたいな、データ構造ダンプ関数がかかせません。というわけで作りました。

使い方



import Utils;


trace( Utils.print_r( [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] ) );

などとすると、

[trace] ---------------------------------------------------------------------
[trace] :Array =>
[trace]   [0]:int => 0
[trace]   [1]:int => 1
[trace]   [2]:int => 2
[trace]   [3]:int => 3
[trace]   [4]:int => 4
[trace]   [5]:int => 5
[trace]   [6]:int => 6
[trace]   [7]:int => 7
[trace]   [8]:int => 8
[trace]   [9]:int => 9
[trace] ---------------------------------------------------------------------

と、帰ってきます。他に toCamelCase / capitalize ができます。

既存の問題

コード

package
{
  import flash.utils.describeType;

  public class Utils
  {

    public static function print_r (o:*, name:String = "", recur:int = 0):String 
    {
      var result:String = "";
      var type:String   = typeof(o);
      var desc:XML      = describeType(o);

      // meta data of object
      if (recur == 0)
      {
        result += "---------------------------------------------------------------------\n";
      }
      else
      {
        for (var i:int = 0; i < recur; ++i)
        {
          result += "  ";
        }
      }
      if (name)
      {
        result += '[' + name + ']';
      }
      result += ':' + desc.@name + ' => ';

      // content of object
      switch (type)
      {
        case "boolean":
        case "number":
        case "string":
          result += String(o);
          break;
        case "xml":
            result += o.toXMLString();
            break;0
        case "object":
          if (desc.@name == "Object" || desc.@name == "Array")
          {
            for (var key:String in o)
            {
              result += "\n";
              result += print_r(o[key], key, (recur + 1));
            }
          }
          else
          {
            var prop:XML;
            //trace("UTIL: " + typeof(o));
            //trace("UTIL: " + desc.toXMLString());
            // -- properties
            for each (prop in desc.variable)
            {
              result += "\n";
              result += print_r(o[prop.@name], prop.@name, (recur + 1));
            }
            // -- methods
            for each (prop in desc.method)
            {
              //trace("UTIL: " + prop.toXMLString());
              result += "\n";
              result += print_r(o[prop.@name], prop.@name, (recur + 1));
            }
            // -- constructor
            //<constructor>
            //  <parameter index="1" type="flash.net::URLRequest" optional="true"/>
            //</constructor>
            // -- inheritance and implements
            //<implementsInterface type="flash.events::IEventDispatcher"/>
            //<extendsClass type="flash.events::EventDispatcher"/>
            //<extendsClass type="Object"/>
            // -- events and others..
            //<metadata name="Event">
            //  <arg key="name" value="httpStatus"/>
            //  <arg key="type" value="flash.events.HTTPStatusEvent"/>
            //</metadata>
          }
          break;
        case "function":
          //trace("UTIL: " + typeof(o));
          //trace("UTIL: " + desc.toXMLString());
          result += String(o);
          break;
      }

      if (recur == 0)
      {
        result += "\n---------------------------------------------------------------------";
      }
      return result;
    }

    public static function toCamelCase (str:String):String 
    {
      var r:String = "";
      var a:Array = str.split(' ');
      for (var s:String in a)
      {
        r += Utils.capitalize(a[s]);
      }
      return r;
    }

    public static function capitalize (str:String):String 
    {
      var r:String = "";
      r += (str.slice(0, 1)).toUpperCase();
      r += str.slice(1);
      return r;
    }

  }
}

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