Coding style and undoing indentation hell(virtualdub.org)

    // Original
    function render() {
      $return = null;
      if($condition1) {
        if($condition2) {
          $return = 2;
        } else {
          $return = 1;
        }
      } elseif($condition3) {
        $return = 3;
      } else {
        $return = 4;
      }
      return $return;
    }

    // Refactored
    function render() {
      if($condition1 && $condition2) return 2;
      if($condition1) return 1;
      if($condition3) return 3;
      return = 4;
    }

  if (...) {
        if (...) {
            ...
    } else {
        if (...) {
            ...
        } else if (...) {
            ...
        } else {
            ...
        }
    }

  if (...) 
  {
      if (...) 
      {
        ...
      } 
      else 
      {
          if (...) 
          {
            ...
          } 
          else if (...) 
          {
            ..
          } 
          else 
          {
            ...
          }
      }
  }

  if(pushbutton == 0)
  {
    led = 12;
  }
  else
  {
    led = 24;
  }

  led = (pushbutton == 0) ? 12 : 24;

  led = (pushbutton * 12) + 12;

  led = 12 * (pushbutton + 1);

  if (!test()) {
    handle_failure();
  } else {
    // do lots of work
  }

  if (NULL == v)

  if (!test1()) {
      handle_failure_1();
      return false;
  }

  $x = $y if $b;

  return $b if $a;

  if ($a == FOO) {
    $c = $d;
    }
  else if ($a == BAR) {
    $c = $e; 
    }
  else {
    $c = $f;
  }

  $c = get_val($a);

	...

  sub get_val {
   my ($a) = @_;
   return $d if $a == FOO;
   return $e if $a == BAR;
   return $f;
   }

  def handles_this_case(params)
     #code from test1()
  end

  def handle(params)
    #code from handle_failure_1()
    return false;
  end

  def handles_this_case(params)
     #code from test2()
  end

  def handle(params)
    #code from handle_failure_2()
    return false;
  end

  def handles_this_case(params)
     #code from test3()
  end

  def handle(params)
    #code from handle_failure_3()
    return false;
  end

  def handles_this_case(params)
    return true
  end

  def handles(params)
    //code from handle_success
    return true
  end

  #There are ways to set this up fairly easily. One simple way it to just new it up here, but you could auto-wire it too
  handlers = [HandlesFailure1, HandlesFailure2, HandlesFailure3, HandlesSuccess]

  def do_something(params)

    handlers.each do |handler|
      return handler.handle(params) if handler.handles_this_case(params)
    end

  end