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Showing 1-10 of 18 total  RSS 

sys font alpha in as3

// apply a filter to a system font in order to adjust alpha

myTextField.filters = [new BlurFilter(0,0,0)];
myTextField.alpha = 0.5;
to font filter as3 by deafmetal on Apr 19, 2008

Display a filtered list using XSLT

Following on from the post A simple XSLT example [dzone.com], this code lists all files which have the type 'rb' (equivalent to ls *.rb).

file: dir.xsl
<?xml version="1.0"?>

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
      
    <xsl:template match="dir">
    <div id="articles">
      <ul>
      <xsl:apply-templates select="records/file[@type='rb']"/>
      </ul>
    </div>
    </xsl:template>
    
    <xsl:template match="records/file[@type='rb']">
      <li><xsl:value-of select="."/></li>
    </xsl:template>
    
</xsl:stylesheet>

output:
<div id='articles'>
  <ul>
    <li>projxmlhelper.rb</li>
    <li>feedpopulated.rb</li>
    <li>squrl_handler.rb</li>
    <li>password_handler.rb</li>
    <li>category.rb</li>
    <li>gwd.rb</li>
  </ul>
</div>


*update 11:58am 26-Feb*
Here's a filter I will be using in my projects

<?xml version="1.0"?>

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
      
    <xsl:template match="dir">
    <div id="articles">
      <ul>
      <xsl:apply-templates select="records/file"/>
      </ul>
    </div>
    </xsl:template>
    
    <xsl:template match="records/file">
      <xsl:if test="@type=$type">
        <li><xsl:value-of select="."/></li>
      </xsl:if>
    </xsl:template>
    
</xsl:stylesheet>
to ruby xml xslt xpath filter attribute by jrobertson on Feb 26, 2008

BloominSimple: Ultra-easy, pure Ruby Bloom filter library

Requires BitField.

#        NAME: BloominSimple
#      AUTHOR: Peter Cooper
#     LICENSE: MIT ( http://www.opensource.org/licenses/mit-license.php )
#   COPYRIGHT: (c) 2007 Peter Cooper
# DESCRIPTION: Very basic, pure Ruby Bloom filter. Uses my BitField, pure Ruby
#              bit field library (http://snippets.dzone.com/posts/show/4234).
#              Supports custom hashing (default is 3).
#
#              Create a Bloom filter that uses default hashing with 1Mbit wide bitfield
#                bf = BloominSimple.new(1_000_000)
#              
#              Add items to it
#                File.open('/usr/share/dict/words').each { |a| bf.add(a) }
#
#              Check for existence of items in the filter
#                bf.includes?("people")     # => true
#                bf.includes?("kwyjibo")    # => false
#
#              Add better hashing (c'est easy!)
#                require 'digest/sha1'
#                b = BloominSimple.new(1_000_000) do |item|
#                  Digest::SHA1.digest(item.downcase.strip).unpack("VVVV")
#                end
#
#              More
#                %w{wonderful ball stereo jester flag shshshshsh nooooooo newyorkcity}.each do |a|
#                  puts "#{sprintf("%15s", a)}: #{b.includes?(a)}"
#                end
#
#                 #  =>   wonderful: true
#                 #  =>        ball: true
#                 #  =>      stereo: true
#                 #  =>      jester: true
#                 #  =>        flag: true
#                 #  =>  shshshshsh: false
#                 #  =>    nooooooo: false
#                 #  => newyorkcity: false

require 'benchmark'
require 'bitfield'

class BloominSimple
  attr_reader :bitfield, :hasher
  
  def initialize(bitsize, &block)
    @bitfield = BitField.new(bitsize)
    @size = bitsize
    @hasher = block || lambda do |word|
      word = word.downcase.strip
      [h1 = word.sum, h2 = word.hash, h2 + h1 ** 3]
    end
  end
  
  def add(item)
    @hasher[item].each { |hi| @bitfield[hi % @size] = 1 }
  end
  
  def includes?(item)
    @hasher[item].each { |hi| return false unless @bitfield[hi % @size] == 1 } and true
  end
end
to ruby dictionary filter bloom filters spellcheck by peter on Jul 01, 2007

CSS Hacks for opacity

in Internet Explorer 4, Gecko-based browsers, and Safari.
#transparent {
    filter: alpha(opacity=50);
    -moz-opacity: 0.5;
    opacity: 0.5;
}
to css filter hacks by Adios on May 05, 2007

BlockFlash-Revisited.user.js

// ==UserScript==
// @name		BlockFlash-Revisited
// @namespace		http://snippets.dzone.com/posts/show/3054
// @description	Do not start Flash animation until you click on them.
// @include		*
// @exclude		http://www.macromedia.com/*
// @exclude		http://www.atomfilms.com/*
// @exclude		http://uploads.ungrounded.net/*
// @exclude		http://www.albinoblacksheep.com/*
// ==/UserScript==

/*
	Revised by Andrew Pennebaker (andrew.pennebaker@gmail.com)

	Author: Jos van den Oever (jos@vandenoever.info)

	License: GPL

	Version history:
		2006-02-12: initial version
		2006-11-28: changed appearance

Inspiration for this script comes from the removeFlash script and the FlashBlock firefox extension.
*/

(function () {
	var objects=document.getElementsByTagName("object");

	for (i=0; i<objects.length; i++) {
		var flash=objects[i];

		if (flash.innerHTML.match(/.swf|shockwave|flash/)) {
			var placeholder=document.createElement("div");

			placeholder.style.cursor='pointer';
			placeholder.style.background='orange'; // 'gray '
			placeholder.style.textAlign='center';
			placeholder.style.color='black';
			placeholder.innerHTML="[Play Flash]";

			flash.parentNode.insertBefore(placeholder, flash);
			flash.on=false;

			placeholder.addEventListener(
				'click',
				function() {
					if (flash.on) {
						flash.style.display='none';
						placeholder.innerHTML="[Play Flash]";
						flash.on=false;
					}
					else {
						flash.style.display='';
						placeholder.innerHTML="[Stop Flash]";
						flash.on=true;
					}
				},
				true
			);

			flash.style.display='none';
		}
	}
})();
to javascript greasemonkey flash block filter remove userscript ad ads by mcandre on Nov 28, 2006

Java - Erode

// JAI Filter erode

public RenderedImage erode(BufferedImage img)
	{
		KernelJAI kernel = new KernelJAI(7, 7, new float[]{
															0, 0, 0, 0, 0, 0, 0,
															0, 1, 1, 1, 1, 1, 0,
															0, 1, 1, 1, 1, 1, 0,
															0, 1, 1, 1, 1, 1, 0,
															0, 1, 1, 1, 1, 1, 0,
															0, 1, 1, 1, 1, 1, 0,
															0, 0, 0, 0, 0, 0, 0
															});
		ParameterBlock pb = new ParameterBlock();
		pb.addSource(img);
		pb.add(kernel);
		
		return JAI.create("erode", pb);
	}
to java images image RGB filter jpg j2me gray JAI by whitetiger on Nov 05, 2006

Java - subTraction

// Use JAI filter

public RenderedImage subTraction(BufferedImage img1, BufferedImage img2)
	{
		ParameterBlock pb = new ParameterBlock();
		pb.addSource(img1);
		pb.addSource(img2);
		
		return JAI.create("subtract", pb);
	}
to java images image RGB filter jpg j2me gray JAI by whitetiger on Nov 05, 2006

Java - showBitPlanes

// the input it must be a b/w image

public BufferedImage showBitPlanes(BufferedImage bi, int lv)
	{
		int level = 0;
		
		switch(level)
		{
			case 0:
				level = 128;
				break;
			case 1:
				level = 64;
				break;
			case 2:
				level = 32;
				break;
			case 3:
				level = 16;
				break;
			case 4:
				level = 8;
				break;
			case 5:
				level = 4;
				break;
			case 6:
				level = 2;
				break;
			case 7:
				level = 1;
				break;
			default:
					return null;
		}
		
		int width = bi.getWidth();
		int height = bi.getHeight();
		
		BufferedImage img = new BufferedImage(width, height, bi.getType());
		
		for(int x=0; x<width; x++)
			for(int y=0; y<height; y++)
				img.setRGB(x, y, ((bi.getRGB(x, y) & level)/level)*255);
		
		return img;
	}
to java images image RGB filter jpg j2me bit gray planes by whitetiger on Nov 04, 2006

Java - Dilate3

// pixel before the filter
// |--|--|--|
// | | | |
// |--|--|--|
// | | *| |
// |--|--|--|
// | | | |
// |--|--|--|

// pixel after the filter
// |--|--|--|
// | *| *| *|
// |--|--|--|
// | *| *| *|
// |--|--|--|
// | *| *| *|
// |--|--|--|

public BufferedImage dilate3(BufferedImage bi)
	{
		BufferedImage buff = new BufferedImage(bi.getWidth(), bi.getHeight(), bi.getType());
		
		Kernel kernel = new Kernel(3, 3, new float[] {
														1f, 1f, 1f, 
														1f, 1f, 1f, 
														1f, 1f, 1f
													 });
		
		ConvolveOp op = new ConvolveOp(kernel);
		op.filter(bi, buff);
		
		return buff;
	}
to java images image RGB filter jpg j2me gray dilate by whitetiger on Nov 04, 2006

Java - EdgeW / EdgeH

public BufferedImage EdgeW(BufferedImage bi)
	{
		BufferedImage buff = new BufferedImage(bi.getWidth(), bi.getHeight(), bi.getType());
		
		Kernel kernel = new Kernel(3, 3, new float[] {
														-1f, 0f, 1f, 
														-2f, 0f, 2f, 
														-1f, 0f, 1f
													 });
		
		ConvolveOp op = new ConvolveOp(kernel);
		op.filter(bi, buff);
		
		return buff;
	}



	public BufferedImage EdgeH(BufferedImage bi)
	{
		BufferedImage buff = new BufferedImage(bi.getWidth(), bi.getHeight(), bi.getType());
		
		Kernel kernel = new Kernel(3, 3, new float[] {
														-1f, -2f, -1f, 
														 0f,  0f,  0f, 
														 1f,  2f,   1f
													 });
		
		ConvolveOp op = new ConvolveOp(kernel);
		op.filter(bi, buff);
		
		return buff;
	}
to java images image RGB filter jpg j2me gray by whitetiger on Nov 03, 2006
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