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Deleting a (Duplicate) Retweet from your Twitter Feed

Double Retweeting and How to Avoid Over-Duplication

I have seen many people retweeting like crazy and I've noticed that once in a while these people have been retweeting the exact same tweet more than once.

I'm pretty sure that in most cases these people ignore the fact. Personally I find their twitter feed annoying because of that. Retweeting is totally okay, it's sharing what others have tweeted and there is nothing wrong with it. However, seeing the exact same tweet 2, 3, 4, or even 5 times pretty much in a row is rather bad taste. I understand that this very tweet is super ...

Insert Node Parameter: repeat (6-1.2) [no content]

The repeat keyword is used to repeat the filtering on the data just inserted. This is particularly useful with the asterisk name or on nodes that do not otherwise include a format that transforms the tags included in themselves.

This let you create nodes that are like macros.

Note that the macro can itself include a repeat in one of its Insert Node tags.1

  • 1. As far as I can tell, this will not create recursive calls, however, if you have a problem with a macro using repeat, try to remove the keyword to see if that solves the problem. If so, let me know by

Insert Nodes used as a macro (6.x-1.2)

This module can be used to create macros (as pointed out by one of our user in a Drupal issue.)

The following steps show you how you can create a macro with the Insert Node module.

Create the Macro

First, create a node that is to become the macro. We will call this node macro. It is used without the Insert Node filter so the Insert Node tags do not get changed. This is important since we reference the main node (with the asterisk) and that reference would look like a recursive reference.

One idea is to use the macro as a PayPal button which gets set with parameters from another node. ...

Insert Node Usage


The Insert node tag syntax is:

   [node:<name of node> <parameters>]

Name of node

The <name of node> can either be

  • The name of the node, i.e. it's URL without the protocol and domain1, or
  • The node identifier (the number you see in your URL when you edit the node), or
  • An asterisk (*) in which case the current node applies2
    • 1. For instance, to insert this very node, I would use the name doc_insert_node_usage.
    • 2. The asterisk is useful to repeat something from the node in a block. This could be the title of the node or a CCK field. I would suggest ...

Upgrading from version 1.0/1.1 to 1.2 or newer (or -dev) for Drupal 6.x users

I changed the name of the module back to InsertNode (although I did not want to, I did not want to jeopardize the Drupal 5 version... which would probably have been fine, but well...)

So, the newer version of the D6 module is again called InsertNode.

To upgrade you will want to keep the other version running until you get the new version as the replacement (although you can manage your site the way you'd like this procedure let you switch from the previous version to the new version without having to turn off your site for a little while.)

  1. Extract the new version, it adds InsertNode ...

Appendix A — The geometry in SWF — Edges

Edges are used to define a shape vector based and also coordinates where images need to be drawn. The edges are always coordinates from where ever your last point was to where ever you want the next point to be (a little like a turtle in LOGO).

SWF Any Filter (swf_any_filter)

SWF Structure Info
Tag Flash Version: 
SWF Structure: 
/* the filter type */
struct swf_filter_type {
	unsigned char	f_type;

struct swf_filter_glow {
	swf_filter_type	f_type;		/* 0, 2, 3, 4 or 7 */
	if(f_type == GradientGlow || f_type == GradientBevel) {
		unsigned char		f_count;
	else {
		f_count = 1;
	swf_rgba		f_rgba[f_count];
	if(f_type == Bevel) {
		swf_rgba		f_highlight_rgba[f_count];
	if(f_type == GradientGlow || f_type == GradientBevel) {
		unsigned char		f_position[f_count];
	signed long fixed	f_blur_horizontal;
	signed long fixed	f_blur_vertical;
	if(f_type != Glow) {
		signed long fixed	f_radian_angle;
		signed long fixed	f_distance;
	signed short fixed	f_strength;
	unsigned		f_inner_shadow : 1;
	unsigned		f_knock_out : 1;
	unsigned		f_composite_source : 1;
	if(f_type == Bevel) {
		unsigned		f_on_top : 1;
	else {
		unsigned		f_reserved : 1;
	if(f_type == GradientGlow || f_type == GradientBevel) {
		unsigned		f_passes : 4;
	else {
		unsigned		f_reserved : 4;

struct swf_filter_blur {
	swf_filter_type		f_type;	/* 1 */
	unsigned long fixed	f_blur_horizontal;
	unsigned long fixed	f_blur_vertical;
	unsigned		f_passes : 5;
	unsigned		f_reserved : 3;

struct swf_filter_convolution {
	swf_filter_type	f_type;		/* 5 */
	unsigned char	f_columns;
	unsigned char	f_rows;
	long float	f_divisor;
	long float	f_bias;
	long float	f_weights[f_columns × f_rows];
	swf_rgba	f_default_color;
	unsigned	f_reserved : 6;
	unsigned	f_clamp : 1;
	unsigned	f_preserve_alpha : 1;

struct swf_filter_colormatrix {
	swf_filter_type	f_type;		/* 6 */
	long float	f_matrix[20];

struct swf_any_filter {
	swf_filter_type			f_fitler_type;
	swf_filter_blur			f_filter_blur;
	swf_filter_colormatrix		f_filter_colormatrix;
	swf_filter_convolution		f_filter_convolution;
	swf_filter_glow			f_filter_glow;

A filter defines how to transform the objects it is attached to. The first byte is the filter type. The data following depend on the type. Because each filter is much different, they are defined in separate structures. You can attach a filter to an object using an ActionScript or the PlaceObject3 tag.

The following describes the different filters available since version 8.

SWF Gradient (swf_gradient)

SWF Structure Info
Tag Flash Version: 
SWF Structure: 
struct swf_gradient {
	if(tag == DefineShape4) {
		unsigned		f_spread_mode : 2;
		unsigned		f_interpolation_mode : 2;
		unsigned		f_count : 4;
	else {
		unsigned		f_pad : 4;
		unsigned		f_count : 4;
	swf_gradient_record	f_gradient_record[f_count];
	/* f_type is defined in the swf_fill_style encompassing this gradient */
	if(f_type == 0x13) {
		signed short fixed	f_focal_point;

This structure defines a gradient. This is a set of colors which are used to define an image with colors smoothly varying from one color to the next. The gradient can be radial (circular) or linear (rectangular).

The f_count field is limited depending on the tag used and the version of SWF as defined below:

The assert() macro in C/C++


This is a subject that comes back all the time in C/C++ boards.

Should you use assertions?

The answer is clearly yes. But the C/C++ assert() function is usually defined using a macro. Macros have several problems. The most common ones are: they offer no type checking, they do not warn you about weird side effects, they have a different syntax than the C/C++ language itself.

One good thing: for a fast program, the debug code used to check parameters, results, etc. is gone.

One really bad thing: if the expression in the macro has a side effect, the release program is different from ...