<?php

namespace CoffeeScript;

Init::init();

class Helpers {

  static function compact(array $array)
  {
    $compacted = array();

    foreach ($array as $k => $v)
    {
      if ($v)
      {
        $compacted[] = $v;
      }
    }

    return $compacted;
  }

  static function del( & $obj, $key)
  {
    $val = NULL;

    if (isset($obj[$key]))
    {
      $val = $obj[$key];
      unset($obj[$key]);
    }

    return $val;
  }

  static function extend($obj, $properties)
  {
    foreach ($properties as $k => $v)
    {
      $obj->{$k} = $v;
    }

    return $obj;
  }

  static function flatten(array $array)
  {
    $flattened = array();

    foreach ($array as $k => $v)
    {
      if (is_array($v))
      {
        $flattened = array_merge($flattened, flatten($v));
      }
      else
      {
        $flattened[] = $v;
      }
    }

    return $flattened;
  }

  static function & last( & $array, $back = 0)
  {
    static $NULL;

    $i = count($array) - $back - 1;

    if (isset($array[$i]))
    {
      return $array[$i];
    }
    else
    {
      // Make sure $NULL is really NULL.
      $NULL = NULL;

      return $NULL;
    }
  }


  /**
   * Wrap a primitive with an object, so that properties can be attached to it
   * like in JavaScript.
   */
  static function wrap($v)
  {
    return new Value($v);
  }

}

?>