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Python lxml - returns null list

- by Chris Finlayson

I cannot figure out what is wrong with the XPATH when trying to extract a value from a webpage table. The method seems correct as I can extract the page title and other attributes, but I cannot extract the third value, it always returns an empty list? from lxml import html import requests test_url = 'SC312226' page = ('https://www.opencompany.co.uk/company/'+test_url) print 'Now searching URL: '+page data = requests.get(page) tree = html.fromstring(data.text) print tree.xpath('//title/text()') # Get page title print tree.xpath('//a/@href') # Get href attribute of all links print tree.xpath('//*[@id="financial"]/table/tbody/tr/td[1]/table/tbody/tr[2]/td[1]/div[2]/text()') Unless i'm missing something, it would appear the XPATH is correct: Chrome screenshot I checked Chrome console, appears ok! So i'm at a loss $x ('//*[@id="financial"]/table/tbody/tr/td[1]/table/tbody/tr[2]/td[1]/div[2]/text()') [ "£432,272" ]

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Where is the root [closed]

- by smwikipedia

I read the manual page of the "mount" command, at it reads as below: All files accessible in a Unix system are arranged in one big tree, the file hierarchy, rooted at /. These files can be spread out over several devices. The mount command serves to attach the file system found on some device to the big file tree. My question is: Where is this "big tree" located?

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Is it possible to auto generate Getter/Setter from Array Values in PHP?

- by Phill Pafford

So I have a couple of arrays $array_1 = Array('one','two','three'); $array_2 = Array('red','blue','green'); Is there a dynamic way to create the Setters and Getters for an array with single value entries? So the class would be something like: class xFromArray() { } So the above if I passed $array_1 it would generate something like this: private $one; setOne($x) { $one = $x; } getOne() { return $one; } if I passed $array_2 it would generate something like this: private $red; setRed($x) { $red = $x; } getRed() { return $red; } So I would call it somehow like this? (My best guess but doesn't seem that this would work) $xFromArray = new xFromArray; foreach($array_1 as $key=>$data) { $xFromArray->create_function(set.ucfirst($data)($data)); echo $xFromArray->create_function(get.ucfirst($data)); }

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add_shown & add_hiding ModalPopupExtender Events

- by Yousef_Jadallah

In this topic, I’ll discuss the Client events we usually need while using ModalPopupExtender. The add_shown fires when the ModalPopupExtender had shown and add_hiding fires when the user cancels it by CancelControlID,note that it fires before hiding the modal. They are useful in many cases, for example may you need to set focus to specific Textbox when the user display the modal, or if you need to reset the controls values inside the Modal after it has been hidden. To declare Client event either in pageLoad javascript function or you can attach the function by Sys.Application.add_load like this: Sys.Application.add_load(modalInit); function modalInit() { var modalPopup = $find('mpeID'); modalPopup.add_hiding(onHiding); } function onHiding(sender, args) { } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } I’ll use the first way in the current example. So lets start with the illustration: 1- In this example am using simple panel which contain UserName and Password Textboxes besides submit and cancel buttons, this Panel will be used as PopupControlID in the ModalPopupExtender : <asp:Panel ID="panModal" runat="server" Height="180px" Width="300px" style="display:none" CssClass="ModalWindow"> <table width="100%" > <tr> <td> User Name </td> <td> <asp:TextBox ID="txtName" runat="server"></asp:TextBox> </td> </tr> <tr> <td> Password </td> <td> <asp:TextBox ID="txtPassword" runat="server" TextMode="Password"></asp:TextBox> </td> </tr> </table> <br /> <asp:Button ID="btnSubmit" runat="server" Text="Submit" /> <asp:Button ID="btnCancel" runat="server" Text="Cancel" /> </asp:Panel> You can use this simple style for the Panel : <style type="text/css"> .ModalWindow { border: solid; border-width:3px; background:#f0f0f0; } </style> .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } 2- Create the view button (TargetControlID) as you know this contain the ID of the element that activates the modal popup: <asp:Button ID="btnView" runat="server" Text="View" /> .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } 3-Add the ModalPopupExtender ,moreover don’t forget to add the ScriptManager: <asp:ScriptManager ID="ScriptManager1" runat="server"/> <cc1:ModalPopupExtender ID="ModalPopupExtender1" runat="server" TargetControlID="btnView" PopupControlID="panModal" CancelControlID="btnCancel"/> .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } 4-In the pageLoad javascript function inside add_shown event set the focus on the txtName , and inside add_hiding reset the two Textboxes. <script language="javascript" type="text/javascript"> function pageLoad() { $find('ModalPopupExtender1').add_shown(function() { alert('add_shown event fires'); $get('<%=txtName.ClientID%>').focus(); }); $find('ModalPopupExtender1').add_hiding(function() { alert('add_hiding event fires'); $get('<%=txtName.ClientID%>').value = ""; $get('<%=txtPassword.ClientID%>').value = ""; }); } </script> .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } I’ve added the two alerts just to let you show when the event fires. Hope this simple example show you the benefit and how to use these events.

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Jframe using multiple classes?

- by user2945880

and im trying to make it so it can show multiple classes at once Jframe: import javax.swing.JFrame; import java.awt.BorderLayout; public class Concert { public static void main(String[] args) { JFrame frame = new JFrame(); frame.setSize(1000, 800); frame.setTitle("Concert!"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); Concertbackground component = new Concertbackground(); BandComponent component1 = new BandComponent(); frame.add(component, BorderLayout.NORTH); frame.add(component1, BorderLayout.CENTER); frame.setVisible(true); } } These are the two classes mentioned in the Jframe: import java.awt.Color; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Rectangle; import java.awt.geom.Ellipse2D; import java.awt.geom.Line2D; import javax.swing.JComponent; import java.awt.Polygon; /* BandComponent.java Justin Walker 10/27/13 */ public class BandComponent extends JComponent { public void paintComponent(Graphics g) { // Recover Graphics2D Graphics2D g2 = (Graphics2D) g; int xScale = 250; int yScale = 100; int x = 343; int y = 343; //singer Polygon sing = new Polygon(); sing.addPoint(667 ,208 + xScale); sing.addPoint(676,213 + xScale); sing.addPoint(678,217 + xScale); sing.addPoint(682,221 + xScale); sing.addPoint(681,224 + xScale); sing.addPoint(680,231 + xScale); sing.addPoint(676,242 + xScale); sing.addPoint(672,244 + xScale); sing.addPoint(672,250 + xScale); sing.addPoint(682,248 + xScale); sing.addPoint(713,244 + xScale); sing.addPoint(734,247 + xScale); sing.addPoint(750,247 + xScale); sing.addPoint(794,232 + xScale); sing.addPoint(800,231 + xScale); sing.addPoint(801,223 + xScale); sing.addPoint(807,219 + xScale); sing.addPoint(806,221 + xScale); sing.addPoint(806,229 + xScale); sing.addPoint(818,222 + xScale); sing.addPoint(820,223 + xScale); sing.addPoint(825,227 + xScale); sing.addPoint(825,240 + xScale); sing.addPoint(817,243 + xScale); sing.addPoint(807,245 + xScale); sing.addPoint(803,247 + xScale); sing.addPoint(801,252 + xScale); sing.addPoint(781,257 + xScale); sing.addPoint(762,264 + xScale); sing.addPoint(734,271 + xScale); sing.addPoint(701,286 + xScale); sing.addPoint(691,296 + xScale); sing.addPoint(693,311 + xScale); sing.addPoint(690,317 + xScale); sing.addPoint(690,335 + xScale); sing.addPoint(691,339 + xScale); sing.addPoint(689,343 + xScale); sing.addPoint(712,382 + xScale); sing.addPoint(725,400 + xScale); sing.addPoint(731,418 + xScale); sing.addPoint(731,428 + xScale); sing.addPoint(738,454 + xScale); sing.addPoint(741,460 + xScale); sing.addPoint(746,468 + xScale); sing.addPoint(766,468 + xScale); sing.addPoint(771,481 + xScale);// sing.addPoint(723,482 + xScale); sing.addPoint(720,462 + xScale); sing.addPoint(718,454 + xScale); sing.addPoint(709,436 + xScale); sing.addPoint(703,436 + xScale); sing.addPoint(699,417 + xScale); sing.addPoint(686,396 + xScale); sing.addPoint(678,395 + xScale); sing.addPoint(676,437 + xScale); sing.addPoint(673,439 + xScale); sing.addPoint(638,435 + xScale); sing.addPoint(640,398 + xScale); sing.addPoint(634,410 + xScale); sing.addPoint(625,416 + xScale); sing.addPoint(622,436 + xScale); sing.addPoint(622,443 + xScale); sing.addPoint(615,447 + xScale); sing.addPoint(609,456 + xScale); sing.addPoint(606,481 + xScale);// sing.addPoint(557,481 + xScale); sing.addPoint(560,467 + xScale); sing.addPoint(579,467 + xScale); sing.addPoint(587,464 + xScale); sing.addPoint(593,452 + xScale); sing.addPoint(594,441 + xScale); sing.addPoint(592,434 + xScale); sing.addPoint(600,416 + xScale); sing.addPoint(608,405 + xScale); sing.addPoint(609,394 + xScale); sing.addPoint(617,376 + xScale); sing.addPoint(619,363 + xScale); sing.addPoint(632,334 + xScale); sing.addPoint(637,324 + xScale); sing.addPoint(635,314 + xScale); sing.addPoint(639,296 + xScale); sing.addPoint(627,285 + xScale); sing.addPoint(600,279 + xScale); sing.addPoint(582,278 + xScale); sing.addPoint(575,275 + xScale); sing.addPoint(546,256 + xScale); sing.addPoint(536,252 + xScale); sing.addPoint(533,350 + xScale); sing.addPoint(534,361 + xScale); sing.addPoint(532,367 + xScale); sing.addPoint(529,369 + xScale); sing.addPoint(524,363 + xScale); sing.addPoint(525,355 + xScale); sing.addPoint(531,254 + xScale); sing.addPoint(527,249 + xScale); sing.addPoint(527,242 + xScale); sing.addPoint(529,237 + xScale); sing.addPoint(532,237 + xScale); sing.addPoint(536,178 + xScale); sing.addPoint(534,129 + xScale); sing.addPoint(535,123 + xScale); sing.addPoint(541,120 + xScale); sing.addPoint(545,123 + xScale); sing.addPoint(547,131 + xScale); sing.addPoint(545,173 + xScale); sing.addPoint(538,233 + xScale); sing.addPoint(549,239 + xScale); sing.addPoint(558,241 + xScale); sing.addPoint(585,257 + xScale); sing.addPoint(599,257 + xScale); sing.addPoint(627,254 + xScale); sing.addPoint(647,251 + xScale); sing.addPoint(653,248 + xScale); sing.addPoint(652,235 + xScale); sing.addPoint(648,226 + xScale); sing.addPoint(652,218 + xScale); sing.addPoint(661,212 + xScale); g2.setColor(Color.black); g2.fill(sing); g2.draw(sing); //guitar Polygon guitar = new Polygon(); guitar.addPoint(148,28); guitar.addPoint(158,32); guitar.addPoint(164,38); guitar.addPoint(168,46); guitar.addPoint(169,52); guitar.addPoint(167,60); guitar.addPoint(164,65); guitar.addPoint(165,70); guitar.addPoint(161,76); guitar.addPoint(158,92); guitar.addPoint(162,97); guitar.addPoint(161,102); guitar.addPoint(158,106); guitar.addPoint(155,108); guitar.addPoint(151,127); guitar.addPoint(152,133); guitar.addPoint(155,137); guitar.addPoint(151,146); guitar.addPoint(153,147); guitar.addPoint(160,142); guitar.addPoint(162,133); guitar.addPoint(162,123); guitar.addPoint(161,113); guitar.addPoint(162,110); guitar.addPoint(164,117); guitar.addPoint(169,131); guitar.addPoint(171,144); guitar.addPoint(170,159); guitar.addPoint(166,167); guitar.addPoint(166,171); guitar.addPoint(174,174); guitar.addPoint(183,184); guitar.addPoint(191,195); guitar.addPoint(196,198); guitar.addPoint(198,200); guitar.addPoint(199,210); guitar.addPoint(211,225); guitar.addPoint(212,233); guitar.addPoint(220,248); guitar.addPoint(233,260); guitar.addPoint(245,266); guitar.addPoint(248,268); guitar.addPoint(249,277); guitar.addPoint(205,275); guitar.addPoint(204,262); guitar.addPoint(187,238); guitar.addPoint(178,224); guitar.addPoint(177,216); guitar.addPoint(156,201); guitar.addPoint(146,197); guitar.addPoint(134,211); guitar.addPoint(128,229); guitar.addPoint(125,244);// guitar.addPoint(121,246); guitar.addPoint(107,248); guitar.addPoint(100,252); guitar.addPoint(97,258); guitar.addPoint(96,253); guitar.addPoint(89,258); guitar.addPoint(65,267); guitar.addPoint(63,274); guitar.addPoint(64,283); guitar.addPoint(41,282); guitar.addPoint(44,270); guitar.addPoint(47,264); guitar.addPoint(51,255); guitar.addPoint(73,238); guitar.addPoint(79,228); guitar.addPoint(97,222); guitar.addPoint(101,204); guitar.addPoint(102,181); guitar.addPoint(100,170); guitar.addPoint(95,161); guitar.addPoint(97,154); guitar.addPoint(91,152); guitar.addPoint(77,131); guitar.addPoint(65,123); guitar.addPoint(61,105); guitar.addPoint(64,94); guitar.addPoint(72,91); guitar.addPoint(78,82); guitar.addPoint(78,76); guitar.addPoint(70,73); guitar.addPoint(70,67); guitar.addPoint(93,51); guitar.addPoint(101,48); guitar.addPoint(111,52); guitar.addPoint(118,59); guitar.addPoint(119,70); guitar.addPoint(117,78); guitar.addPoint(113,79); guitar.addPoint(112,86); guitar.addPoint(111,88); guitar.addPoint(109,89); guitar.addPoint(109,92); guitar.addPoint(122,99);// guitar.addPoint(124,99); guitar.addPoint(133,96); guitar.addPoint(145,93); //guitar.addPoint(138,124); guitar.addPoint(150,69); guitar.addPoint(150,62); guitar.addPoint(155,58); guitar.addPoint(154,53); guitar.addPoint(149,50); guitar.addPoint(154,46); guitar.addPoint(153,38); guitar.addPoint(147,28); g2.setColor(Color.black); g2.fill(guitar); g2.draw(guitar); Polygon guitar2 = new Polygon (); guitar2.addPoint(141,108); guitar2.addPoint(139,126); guitar2.addPoint(135,122); guitar2.addPoint(128,122); guitar2.addPoint(129,116); guitar2.addPoint(143,108); g2.setColor(Color.white); g2.fill(guitar2); g2.draw(guitar2); //bass guitar Polygon bassgt = new Polygon (); bassgt.addPoint(871,21); bassgt.addPoint(879,24); bassgt.addPoint(885,32); bassgt.addPoint(886,42); bassgt.addPoint(895,47); bassgt.addPoint(904,56); bassgt.addPoint(907,69); bassgt.addPoint(909,83); bassgt.addPoint(910,91); bassgt.addPoint(941,81); bassgt.addPoint(946,75); bassgt.addPoint(945,67); bassgt.addPoint(950,67); bassgt.addPoint(955,75); bassgt.addPoint(960,68); bassgt.addPoint(963,74); bassgt.addPoint(967,72); bassgt.addPoint(971,66); bassgt.addPoint(973,70); bassgt.addPoint(981,67); bassgt.addPoint(984,71); bassgt.addPoint(982,76); bassgt.addPoint(987,80); bassgt.addPoint(986,82); bassgt.addPoint(980,83); bassgt.addPoint(979,90); bassgt.addPoint(974,85); bassgt.addPoint(970,86); bassgt.addPoint(973,91); bassgt.addPoint(965,86); bassgt.addPoint(960,90); bassgt.addPoint(961,100); bassgt.addPoint(955,92); bassgt.addPoint(944,91); bassgt.addPoint(907,103); bassgt.addPoint(906,109); bassgt.addPoint(893,114); bassgt.addPoint(895,123); bassgt.addPoint(900,131); bassgt.addPoint(904,134); bassgt.addPoint(908,145); bassgt.addPoint(911,159); bassgt.addPoint(918,171); bassgt.addPoint(919,190); bassgt.addPoint(923,198); bassgt.addPoint(919,201); bassgt.addPoint(919,210); bassgt.addPoint(927,220); bassgt.addPoint(942,226); bassgt.addPoint(944,234); bassgt.addPoint(909,230); bassgt.addPoint(905,214); bassgt.addPoint(899,204); bassgt.addPoint(893,203); bassgt.addPoint(889,171); bassgt.addPoint(877,151); bassgt.addPoint(861,152); bassgt.addPoint(852,169); bassgt.addPoint(849,203); bassgt.addPoint(841,210); bassgt.addPoint(840,228); bassgt.addPoint(828,233); bassgt.addPoint(806,235); bassgt.addPoint(805,228); bassgt.addPoint(822,219); bassgt.addPoint(824,204); bassgt.addPoint(817,201); bassgt.addPoint(822,196); bassgt.addPoint(822,184); bassgt.addPoint(828,162); bassgt.addPoint(829,152); bassgt.addPoint(820,149); bassgt.addPoint(811,144); bassgt.addPoint(806,134); bassgt.addPoint(805,117); bassgt.addPoint(820,107); bassgt.addPoint(819,89); bassgt.addPoint(811,83); bassgt.addPoint(811,77); bassgt.addPoint(824,66); bassgt.addPoint(825,61); bassgt.addPoint(842,53); bassgt.addPoint(852,43); bassgt.addPoint(853,29); bassgt.addPoint(870,20); g2.setColor(Color.black); g2.fill(bassgt); g2.draw(bassgt); Polygon bassgt2 = new Polygon(); bassgt2.addPoint(845,78); bassgt2.addPoint(845,98); bassgt2.addPoint(843,98); bassgt2.addPoint(842,105); bassgt2.addPoint(839,109); bassgt2.addPoint(834,103); bassgt2.addPoint(832,85); bassgt2.addPoint(845,78); g2.setColor(Color.white); g2.fill(bassgt2); g2.draw(bassgt2); Polygon drums = new Polygon (); drums.addPoint(713,104); drums.addPoint(706,121); drums.addPoint(721,377); drums.addPoint(248,380); drums.addPoint(253,228); drums.addPoint(250,206); drums.addPoint(237,178); drums.addPoint(206,166); drums.addPoint(201,154); drums.addPoint(198,152); drums.addPoint(208,148); drums.addPoint(236,150); drums.addPoint(247,130); drums.addPoint(227,119); drums.addPoint(219,105); drums.addPoint(222,96); drums.addPoint(233,88); drums.addPoint(251,84); drums.addPoint(272,83); drums.addPoint(300,91); drums.addPoint(285,72); drums.addPoint(294,57); drums.addPoint(319,46); drums.addPoint(372,45); drums.addPoint(406,50); drums.addPoint(428,65); drums.addPoint(433,74); drums.addPoint(450,58); drums.addPoint(478,48); drums.addPoint(514,48); drums.addPoint(544,51); drums.addPoint(566,52); drums.addPoint(577,67); drums.addPoint(575,79); drums.addPoint(561,95); drums.addPoint(545,98); drums.addPoint(525,105); drums.addPoint(524,147); drums.addPoint(524,183); drums.addPoint(645,175); drums.addPoint(662,143); drums.addPoint(617,152); drums.addPoint(608,148); drums.addPoint(614,139); drums.addPoint(633,128); drums.addPoint(661,116); drums.addPoint(659,107); drums.addPoint(625,114); drums.addPoint(592,113); drums.addPoint(571,111); drums.addPoint(565,102); drums.addPoint(576,86); drums.addPoint(616,70); drums.addPoint(647,66); drums.addPoint(679,67); drums.addPoint(695,72); drums.addPoint(699,90); drums.addPoint(678,100); drums.addPoint(667,103); drums.addPoint(672,113); drums.addPoint(689,105); drums.addPoint(709,106); g2.setColor(Color.black); g2.fill(drums); g2.draw(drums); } } The second class: import java.awt.Color; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Rectangle; import java.awt.geom.Ellipse2D; import java.awt.geom.Line2D; import javax.swing.JComponent; import java.awt.GradientPaint; /* component that draws the concert background */ public class Concertbackground extends JComponent { public void paintComponent(Graphics g) { super.paintComponent(g); // Recover Graphics2D Graphics2D g2 = (Graphics2D) g; //Background Top g2.setColor(Color.BLUE); Rectangle backgroundTop = new Rectangle (0, 0, getWidth(), getHeight() / 4); g2.fill(backgroundTop); // Background bottom g2.setColor(Color.GREEN); Rectangle backgroundBottom = new Rectangle (0, getHeight() / 2, getWidth(), getHeight() / 2); g2.fill(backgroundBottom); // Speaker base g2.setColor(Color.BLACK); Rectangle base = new Rectangle (0, 0, 50, 100); g2.fill(base); // Speakers circles gray top g2.setColor(Color.DARK_GRAY); Ellipse2D.Double speakerTop = new Ellipse2D.Double(10, 10, 30, 30); g2.fill(speakerTop); //speakers circles black top g2.setColor(Color.BLACK); Ellipse2D.Double speakerTop1 = new Ellipse2D.Double(15, 15, 20, 20); g2.fill(speakerTop1); // Speakers circles gray bottom g2.setColor(Color.DARK_GRAY); Ellipse2D.Double speakerBottom = new Ellipse2D.Double(10, 50, 30, 30); g2.fill(speakerBottom); //speakers circles black bottom g2.setColor(Color.BLACK); Ellipse2D.Double speakerBottom1 = new Ellipse2D.Double(15, 55, 20, 20); g2.fill(speakerBottom1); } } My main question is how do I change my Jframe so it can use as many classes as I want, It cant be the size of my classes because they were used with the same 1000, 800 Jframe to make the classes. I also need to be able to add more than just these two classes to my Jframe.

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reiserfsck on lvm

- by DaDaDom

It seems like my filesystem got corrupted somehow during the last reboot of my server. I can't fsck some logical volumes anymore. The setup: root@rescue ~ # cat /mnt/rescue/etc/fstab proc /proc proc defaults 0 0 /dev/md0 /boot ext3 defaults 0 2 /dev/md1 / ext3 defaults,errors=remount-ro 0 1 /dev/systemlvm/home /home reiserfs defaults 0 0 /dev/systemlvm/usr /usr reiserfs defaults 0 0 /dev/systemlvm/var /var reiserfs defaults 0 0 /dev/systemlvm/tmp /tmp reiserfs noexec,nosuid 0 2 /dev/sda5 none swap defaults,pri=1 0 0 /dev/sdb5 none swap defaults,pri=1 0 0 [UPDATE] First question: what "part" should I check for bad blocks? The logical volume, the underlying /dev/md or the /dev/sdx below that? Is doing what I am doing the right way to go? [/UPDATE] The errormessage when checking /dev/systemlvm/usr: root@rescue ~ # reiserfsck /dev/systemlvm/usr reiserfsck 3.6.19 (2003 www.namesys.com) [...] Will read-only check consistency of the filesystem on /dev/systemlvm/usr Will put log info to 'stdout' Do you want to run this program?[N/Yes] (note need to type Yes if you do):Yes ########### reiserfsck --check started at Wed Feb 3 07:10:55 2010 ########### Replaying journal.. Reiserfs journal '/dev/systemlvm/usr' in blocks [18..8211]: 0 transactions replayed Checking internal tree.. Bad root block 0. (--rebuild-tree did not complete) Aborted Well so far, let's try --rebuild-tree: root@rescue ~ # reiserfsck --rebuild-tree /dev/systemlvm/usr reiserfsck 3.6.19 (2003 www.namesys.com) [...] Will rebuild the filesystem (/dev/systemlvm/usr) tree Will put log info to 'stdout' Do you want to run this program?[N/Yes] (note need to type Yes if you do):Yes Replaying journal.. Reiserfs journal '/dev/systemlvm/usr' in blocks [18..8211]: 0 transactions replayed ########### reiserfsck --rebuild-tree started at Wed Feb 3 07:12:27 2010 ########### Pass 0: ####### Pass 0 ####### Loading on-disk bitmap .. ok, 269716 blocks marked used Skipping 8250 blocks (super block, journal, bitmaps) 261466 blocks will be read 0%....20%....40%....60%....80%....100% left 0, 11368 /sec 52919 directory entries were hashed with "r5" hash. "r5" hash is selected Flushing..finished Read blocks (but not data blocks) 261466 Leaves among those 13086 Objectids found 53697 Pass 1 (will try to insert 13086 leaves): ####### Pass 1 ####### Looking for allocable blocks .. finished 0% left 12675, 0 /sec The problem has occurred looks like a hardware problem (perhaps memory). Send us the bug report only if the second run dies at the same place with the same block number. mark_block_used: (39508) used already Aborted Bad. But let's do it again as mentioned: [...] Flushing..finished Read blocks (but not data blocks) 261466 Leaves among those 13085 Objectids found 54305 Pass 1 (will try to insert 13085 leaves): ####### Pass 1 ####### Looking for allocable blocks .. finished 0%... left 12127, 958 /sec The problem has occurred looks like a hardware problem (perhaps memory). Send us the bug report only if the second run dies at the same place with the same block number. build_the_tree: Nothing but leaves are expected. Block 196736 - internal Aborted Same happens every time, only the actual error message changes. Sometimes I get mark_block_used: (somenumber) used already, other times the block number changes. Seems like something is REALLY broken. Are there any chances I can somehow get the partitions to work again? It's a server to which I don't have physical access directly (hosted server). Thanks in advance!

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Blank displays after inactivity, mouse cursor not showing up

- by Mike Christiansen

I have a Windows 7 Enterprise x86 machine that is exhibiting some strange problems. After some inactivity (it varies how long it takes), when I come back to my computer, both of my monitors are black. The monitors are on, with a black display. Moving the mouse and pressing keys on the keyboard do not work. This happens at least once a day. When I first encountered the issue, I performed a hard shutdown and restarted the computer. About 10% of the time when I did this, the resolutions on my monitors were messed up. The native resolution on the primary monitor is 1600x900, and the native on my secondary is 1440x900. None of the widescreen resolutions would be present in the display properties. I had 800x600, 1024x768, and 1280x1024. As a workaround to this issue, I've found that if I plug in my secondary monitor as the primary monitor, and leave the secondary unplugged, then Windows will start in 1024x768 on the secondary. Then, I can use Windows 7's "Detect" feature and it finds the 1440x900 resolution, and sets it. Then I have to connect the primary monitor to the secondary port and set it as the primary. Then I can switch the two cables, putting the primary into the primary, the secondary into the secondary. Then use the "Detect" feature again, and it finds the correct resolutions. Some time after performing the above, I discovered that when the screens were blanked, I could simply press "Control+Alt+Delete", type in my password, and everything comes up fine - except my mouse cursor. All applications and features work as intended, except there is no mouse cursor (the mouse actually works though...). I have the "Show location of pointer when I press CTRL key" option selected, so I can press CTRL and use my mouse as normal - but I have no actual cursor. When the computer is in this state, UAC is also not functional. Whenever a UAC prompt appears, the screens go black (the original symptoms) and I have to press Escape to exit UAC. Because of the above symptoms (the UAC black screen thing, etc) I beleive winlogon.exe may be the culprit. However, I have no idea how to fix it. I am unable to restart winlogon.exe due to the problems I am having with winlogon.exe (the UAC black screen) Looking for any ideas.... More information Windows 7 x86 Enterprise Domain environment (I have a secondary account with administrator rights) Dell Optiplex 960 Cannot perform "optional" windows updates due to an activation issue (I am testing a windows 7 image, and an activation infrastructure has not been created yet. However, this issue was happening before I was unable to perform windows update, and windows was up to date at the time Updated video card driver (as an attempt to fixing the resolution issue) Disabled all power saving options Please let me know what else you need to help me solve this issue! Thanks in advance, Mike

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kvm and qemu host: Is there a limit for max CPUs (Ubuntu 10.04)?

- by Valentin

Today we encountered a really strange behaviour on two identical kvm and qemu hosts. The host systems each have 4 x 10 Cores, which means that 40 physical cores are displayed as 80 within the operating system (Ubuntu Linux 10.04 64 Bit). We started a Windows 2003 32 Bit VM (1 CPU, 1 GB RAM, we changed those values multiple times) on one of the nodes and noticed that it took 15 minutes until the boot process began. During those 15 minutes, a black screen is shown and nothing happens. libvirt and the host system show that the qemu-kvm process for the guest is almost idling. stracing this process only shows some FUTEX entries, but nothing special. After those 15 minutes, the Windows VM suddenly starts booting and the Windows logo occurs. After a few seconds, the VM is ready to be used. The VM itself is very performant, so this is no performance issue. We tried to pin the CPUs with the virsh and taskset tools, but this only made things worse. When we boot the Windows VM with a Linux Live CD there is also a black screen for several minutes, but not as long as 15. When booting another VM on this host (Ubuntu 10.04) it also has the black screen problem, and also here the black screen is only shown for 2-3 minutes (instead of 15). So, summerinzing this: Each guest on each of those identical nodes suffers from idling a few minutes after being started. After a few minutes, the boot process suddenly starts. We have observed that the idling time happens right after the bios of the guest was initialized. One of our employees had the idea to limit the amount of CPUs with maxcpus=40 (because of 40 physical cores existing) within Grub (kernel parameter) and suddenly the "black-screen-idling"-behaviour disappeared. Searching the KVM and Qemu mailing lists, the internet, forums, serverfault and other various sites for known bugs etc. showed no useful results. Even asking in the dev IRC channels brought no new ideas. The people there recommend us to use CPU pinning, but as stated before it didn't help. My question is now: Is there a sort of limit of CPUs for a qemu or kvm host system? Browsing the source code of those two tools showed that KVM would send a warning if your host has more than 255 CPUs. But we are not even scratching on that limit. Some stuff about the host system: 3.0.0-20-server kvm 1:84+dfsg-0ubuntu16+0.14.0+noroms+0ubuntu4 kvm-pxe 5.4.4-7ubuntu2 qemu-kvm 0.14.0+noroms-0ubuntu4 qemu-common 0.14.0+noroms-0ubuntu4 libvirt 0.8.8-1ubuntu6 4 x Intel(R) Xeon(R) CPU E7-4870 @ 2.40GHz, 10 Cores

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GPU not powering on

- by Lerp

So I got home from work yesterday and went to turn my computer on as per usual to be greeted by this: The screens remained black, so I rebooted; I go as far as GRUB before my screens went black again. I rebooted again, they didn't turn on. I rebooted again, I got as far as the windows login screen. This time I unplugged it, opened it up and cleaned it but to no luck. The GPU was still being tempermental. I repeated the process of turning off and on several times until one time it work as normal. I happily played games for the rest of the night (5-6 hours?) thinking everything was jolly good now. Well I get home from work today and it is doing the SAME thing. Sometimes everything displays normally for a few seconds to minutes then the screens go black; then sometimes the screens don't come on at all. Summary and additional points Screens sometimes turn on before shortly turning off, sometimes they don't; I cannot seem to determine any pattern between when they do or do not turn off. The build has been working fine for about 8 months now so I know it's not hardware incompatibility. If I plug a monitor into the on board graphics I can use the PC normally (just in low graphics mode) I have two monitors and it's a case of they both turn on or not. So I think I can rule out the monitors being dead. I have tried replacing the GPU I have tried replacing the RAM I have tried flashing the CMOS I have tried cleaning the inside The GPU is a Radeon HD 7870 My questions Is my GPU dead? It's not very old and I would rather have a method of being certain it's the GPU before I fork out some money I can't really afford. I do not have a second PC here to test it in. If my GPU is dead why does it sometimes work and sometimes not? Update Okay, it was working again.. at least I thought it was. I left it running for 10-20minutes with the screens black. Turned it off and straight back on and it worked for all of 10minutes. I was then updating the post in joy thinking I could play some games for the rest of the night when BAM it went black again. So yeah, I don't know :C

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GD! Converting a png image to jpeg and making the alpha by default white and not black.

- by Shawn

I tried something like this but it just makes the background of the image white, not necessarily the alpha of the image. I wanted to just upload everything as jpg's so if i could somehow "flatten" a png image with some transparently to default it to just be white so i can use it as a jpg instead. Appreciate any help. Thanks. $old = imagecreatefrompng($upload); $background = imagecolorallocate($old,255,255,255); imagefill($old, 0, 0, $background); imagealphablending($old, false); imagesavealpha($old, true);

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How To? Use an Expression Tree to call a Generic Method when the Type is only known at runtime.

- by David Williams

Please bear with me; I am very new to expression trees and lambda expressions, but trying to learn. This is something that I solved using reflection, but would like to see how to do it using expression trees. I have a generic function: private void DoSomeThing<T>( param object[] args ) { // Some work is done here. } that I need to call from else where in my class. Now, normally, this would be be simple: DoSomeThing<int>( blah ); but only if I know, at design time that I am working with an int. When I do not know the type until runtime is where I need the help. Like I said, I know how to do it via reflection, but I would like to do it via expression trees, as my (very limited) understanding is that I can do so. Any suggestions or points to sites where I can get this understanding, preferably with sample code?

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Oracle Linux 6 DVDs Now Available

- by sergio.leunissen

On Sunday 6 February 2011, Oracle Linux 6 was released on the Unbreakable Linux Network for customers with an Oracle Linux support subscription. Shortly after that, the Oracle Linux 6 RPMs were made available on our public yum server. Today we published the installation DVD images on edelivery.oracle.com/linux. Oracle Linux 6 is free to download, install and use. The full release notes are here, but similar to my recent post about Oracle Linux 5.6, I wanted to highlight a few items about this release. Unbreakable Enterprise Kernel As is the case with Oracle Linux 5.6, the default installed kernel on x86_64 platform in Oracle Linux 6 is the Unbreakable Enterprise Kernel. If you haven't already, I highly recommend you watch the replay of this webcast by Chris Mason on the performance improvements made in this kernel. # uname -r 2.6.32-100.28.5.el6.x86_64 The Unbreakable Enterprise Kernel is delivered via the package kernel-uek: [root@localhost ~]# yum info kernel-uek ... Installed Packages Name : kernel-uek Arch : x86_64 Version : 2.6.32 Release : 100.28.5.el6 Size : 84 M Repo : installed From repo : anaconda-OracleLinuxServer-201102031546.x86_64 Summary : The Linux kernel URL : http://www.kernel.org/ License : GPLv2 Description: The kernel package contains the Linux kernel (vmlinuz), the core of : any Linux operating system. The kernel handles the basic functions : of the operating system: memory allocation, process allocation, : device input and output, etc. ext4 file system The ext4 or fourth extended filesystem replaces ext3 as the default filesystem in Oracle Linux 6. # mount /dev/mapper/VolGroup-lv_root on / type ext4 (rw) proc on /proc type proc (rw) sysfs on /sys type sysfs (rw) devpts on /dev/pts type devpts (rw,gid=5,mode=620) tmpfs on /dev/shm type tmpfs (rw,rootcontext="system_u:object_r:tmpfs_t:s0") /dev/sda1 on /boot type ext4 (rw) none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw) Red Hat compatible kernel Oracle Linux 6 also includes a Red Hat compatible kernel built directly from RHEL source. It's already installed, so booting it is a matter of editing /etc/grub.conf # rpm -qa | grep kernel-2.6.32 kernel-2.6.32-71.el6.x86_64 Oracle Linux 6 no longer includes a Red Hat compatible kernel with Oracle bug fixes. The only Red Hat compatible kernel included is the one built directly from RHEL source. Yum-only access to Unbreakable Linux Network (ULN) Oracle Linux 6 uses yum exclusively for access to Unbreakable Linux Network. To register your system with ULN, use the following command: # uln_register No Itanium Support Oracle Linux 6 is not supported on the Itanium (ia64) platform. Next Steps Read the release notes Download Oracle Linux 6 for free Discuss on the Oracle Linux forum

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Adidas by Jeremy Scott is the famous ‘wings’

- by WoolrichParka

The higher on this design activities the United states banner layover all over the shoes with red lines on one remaining feet and Adidas by Jeremy Scott the famous 5 celebrity agreement in white-colored and red on the other feet.Out of the many couples of JS Pizza 2.0 silhouettes we’ve gotten a look at, one of the more latest and awesome couples features a glow-in-the-dark higher.One of those Adidas Wing Shoes comes with opera create and bone fragments along the shoelaces place.Expect these to fall this fall, along with more from this years’ selection.wufengfengmaple36

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How To Personalize the Windows Command Prompt

- by Matthew Guay

Command line interfaces can be downright boring, and always seem to miss out on the fresh coats of paint liberally applied to the rest of Windows. Here’s how to add a splash of color to Command Prompt and make it unique. By default, Windows Command Prompt is white text on a black background. It get’s the job done, but maybe you want to add some color to it. To get an overview of what we can do with the color command, let’s enter: color /? So, to get the color you want, enter color then the option for the background color followed by the font color. For example, let’s make an old-fashioned green on black look by entering: color 02 There are a bunch of different combinations you can do, like this black background with red text. color 04 You can’t mess it up too much. The color command won’t let you set both the font and the background to the same color, which would make it unreadable. Also, if you want to get back to the default settings, just enter: color Now we’re back to plain-old black and white. Personalize Command Prompt Without Commands If you’d prefer to change the color without entering commands, just click on the Command Prompt icon in the top left corner of the window and select Properties. Select the Colors tab, and then choose the color you want for the screen text and background. You can also enter your own RGB color combination if you want. Here we entered the RGB values to get a purple background color like Ubuntu 10.04. Back in the Properties dialog, you can also change your Command Prompt font from the font tab. Choose any font you want, as long as the one you want is one of the three listed here. Customizations you make via the Properties dialog are saved and will be used any time you open Command Prompt, but any customizations you make with the Color command are only for that session. Conclusion Whether you want to make your command prompt bright enough to cause a sunburn or old-style enough to scare a mainframe operator, with these settings, you can make Command Prompt a bit more unique. Similar Articles Productive Geek Tips Use "Command Prompt Here" in Windows VistaVerify the Integrity of Windows Vista System FilesKeyboard Ninja: Scrolling the Windows Command Prompt With Only the KeyboardRun a Command as Administrator from the Windows 7 / Vista Run boxStart an Application Assigned to a Specific CPU in Windows Vista TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips DVDFab 6 Revo Uninstaller Pro Registry Mechanic 9 for Windows PC Tools Internet Security Suite 2010 How to Add Exceptions to the Windows Firewall Office 2010 reviewed in depth by Ed Bott FoxClocks adds World Times in your Statusbar (Firefox) Have Fun Editing Photo Editing with Citrify Outlook Connector Upgrade Error Gadfly is a cool Twitter/Silverlight app

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Creating a bare bone web-browser: After the html parser, javascript parser, etc have done their work, how do I display the content of the webpage?

- by aste123

This is a personal project to learn computer programming. I took a look at this: https://www.udacity.com/course/viewer#!/c-cs262 The following is the approach taken in it: Abstract Syntax Tree is created. But javascript is still not completely broken down in order not to confuse with the html tags. Then the javascript interpreter is called on it. Javascript interpreter stores the text from the write() and document.write() to be used later. Then a graphics library in Python is called which will convert everything to a pdf file and then we convert it into png or jpeg and then display it. My Question: I want to display the actual text in a window (which I will design later) like firefox or chrome does instead of image files so that the data can be selected, copied, etc by the user of the browser. How do I accomplish this? In other words, what are the other elements of a bare bone web browser that I am missing? I would prefer to implement most of the stuff in C++ although if things seem too complicated I might go with Python to save time and create a prototype and later creating another bare bone browser in C++ and add more features. This is a project to learn more. I do realize we already have lots of reliable browsers like firefox, etc. The way I feel it is done: I think after all the broken down contents have been created by the parsers and interpreters, I will need to access them individually from within the window's code (like qt) and then decide upon a good way to display them. I am not sure if it is the way this should be done. Additions after useful comment by Kilian Foth: I found this page: http://friendlybit.com/css/rendering-a-web-page-step-by-step/ 14. A DOM tree is built out of the broken HTML 15. New requests are made to the server for each new resource that is found in the HTML source (typically images, style sheets, and JavaScript files). Go back to step 3 and repeat for each resource. 16. Stylesheets are parsed, and the rendering information in each gets attached to the matching node in the DOM tree 17. Javascript is parsed and executed, and DOM nodes are moved and style information is updated accordingly 18. The browser renders the page on the screen according to the DOM tree and the style information for each node 19. You see the page on the screen I need help with step 18. How do I do that? How much work do Webkit and Gecko do? I want to use a readymade layout renderer for step number 18 and not for anything that comes before that.

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Video on Architecture and Code Quality using Visual Studio 2012–interview with Marcel de Vries and Terje Sandstrom by Adam Cogan

- by terje

Find the video HERE. Adam Cogan did a great Web TV interview with Marcel de Vries and myself on the topics of architecture and code quality. It was real fun participating in this session. Although we know each other from the MVP ALM community, Marcel, Adam and I haven’t worked together before. It was very interesting to see how we agreed on so many terms, and how alike we where thinking. The basics of ensuring you have a good architecture and how you could document it is one thing. Also, the same agreement on the importance of having a high quality code base, and how we used the Visual Studio 2012 tools, and some others (NDepend for example) to measure and ensure that the code quality was where it should be. As the tools, methods and thinking popped up during the interview it was a lot of “Hey ! I do that too!”. The tools are not only for “after the fact” work, but we use them during the coding. That way the tools becomes an integrated part of our coding work, and helps us to find issues we may have overlooked. The video has a bunch of call outs, pinpointing important things to remember. These are also listed on the corresponding web page. I haven’t seen that touch before, but really liked this way of doing it – it makes it much easier to spot the highlights. Titus Maclaren and Raj Dhatt from SSW have done a terrific job producing this video. And thanks to Lei Xu for doing the camera and recording job. Thanks guys ! Also, if you are at TechEd Amsterdam 2012, go and listen to Adam Cogan in his session on “A modern architecture review: Using the new code review tools” Friday 29th, 10.15-11.30 and Marcel de Vries session on “Intellitrace, what is it and how can I use it to my benefit” Wednesday 27th, 5-6.15 The highlights points out some important practices. I’ll elaborate on a few of them here: Add instructions on how to compile the solution. You do this by adding a text file with instructions to the solution, and keep it under source control. These instructions should contain what is needed on top of a standard install of Visual Studio. I do a lot of code reviews, and more often that not, I am not even able to compile the program, because they have used some tool or library that needs to be installed. The same applies to any new developer who enters into the team, so do this to increase your productivity when the team changes, or a team member switches computer. Don’t forget to document what you have to configure on the computer, the IIS being a common one. The more automatic you can do this, the better. Use NuGet to get down libraries. When the text document gets more than say, half a page, with a bunch of different things to do, convert it into a powershell script instead. The metrics warning levels. These are very conservatively set by Microsoft. You rarely see anything but green, and besides, you should have color scales for each of the metrics. I have a blog post describing a more appropriate set of levels, based on both research work and industry “best practices”. The essential limits are: Cyclomatic complexity and coupling: Higher numbers are worse On method levels: Green : From 0 to 10 Yellow: From 10 to 20 (some say 15). Acceptable, but have a look to see if there is something unneeded here. Red: From 20 to 40: Action required, get these down. Bleeding Red: Above 40 This is the real red alert. Immediate action! (My invention, as people have asked what do I do when I have cyclomatic complexity of 150. The only answer I could think of was: RUN! ) Maintainability index: Lower numbers are worse, scale from 0 to 100. On method levels: Green: 60 to 100 Yellow: 40 – 60. You will always have methods here too, accept the higher ones, take a look at those who are down to the lower limit. Check up against the other metrics.) Red: 20 – 40: Action required, fix these. Bleeding red: Below 20. Immediate action required. When doing metrics analysis, you should leave the generated code out. You do this by adding attributes, unfortunately Microsoft has “forgotten” to add these to all their stuff, so you might have to add them to some of the code. It most cases it can be done so that it is not overwritten by a new round of code generation. Take a look a my blog post here for details on how to do that. Class level metrics might also be useful, at least for coupling and maintenance. But it is much more difficult to set any fixed limits on those. Any metric aggregations on higher level tend to be pretty useless, as the number of methods vary pretty much, and there are little science on what number of methods can be regarded as good or bad. NDepend have a recommendation, but they say it may vary too. And in these days of data binding, the number might be pretty high, as properties counts as methods. However, if you take the worst case situations, classes with more than 20 methods are suspicious, and coupling and cyclomatic complexity go red above 20, so any classes with more than 20x20 = 400 for these measures should be checked over. In the video we mention the SOLID principles, coined by “Uncle Bob” (Richard Martin). One of them, the Dependency Inversion principle we discuss in the video. It is important to note that this principle is NOT on whether you should use a Dependency Inversion Container or not, it is about how you design the interfaces and interactions between your classes. The Dependency Inversion Container is just one technique which is based on this principle, but which main purpose is to isolate things you would like to change at runtime, for example if you implement a plug in architecture. Overuse of a Dependency Inversion Container is however, NOT a good thing. It should be used for a purpose and not as a general DI solution. The general DI solution and thinking however is useful far beyond the DIC. You should always “program to an abstraction”, and not to the concreteness. We also talk a bit about the GRASP patterns, a term coined by Craig Larman in his book Applying UML and design patterns. GRASP patterns stand for General Responsibility Assignment Software Patterns and describe fundamental principles of object design and responsibility assignment. What I find great with these patterns is that they is another way to focus on the responsibility of a class. One of the things I most often found that is broken in software designs, is that the class lack responsibility, and as a result there are a lot of classes mucking around in the internals of the other classes. We also discuss the term “Code Smells”. This term was invented by Kent Beck and Martin Fowler when they worked with Fowler’s “Refactoring” book. A code smell is a set of “bad” coding practices, which are the drivers behind a corresponding set of refactorings. Here is a good list of the smells, and their corresponding refactor patterns. See also this.

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Interpolating height on opengl quad

- by ThePlague

Okay I've got a quad, see picture. And want to find the height at any point in the quad, is there a way to do this accurately as bilinear interpolation doesn't work in this case. As you can see the trees trunk is well beneath the terrain and should be at the same height as the trunks around it. I know the altitude of the vertices marked by a red circle and the centre red circle is roughly where the base should be, I've also crudely added a line as that surface is not flat.

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Introducing Glimpse – Firebug for your server

- by Neil Davidson

Here at Red Gate, we spend every waking hour trying to wow .NET and SQL developers with great products. Every so often, though, we find something out in the wild which knocks our socks off by taking “ingeniously simple” to a whole new level. That’s what a little community led by developers Nik Molnar and Anthony van der Hoorn has done with the open source tool Glimpse. Glimpse describes itself as ‘Firebug for the server.’ You drop the NuGet package into your ASP.NET project, and then — like magic* — your web pages will bare every detail of their execution. Even by our high standards, it was trivial to get running: if you can use NuGet, you’re already there. You get all that lovely detail without changing any code. Our feelings go beyond respect for the developers who designed and wrote Glimpse; we’re thrilled that Nik and Anthony have come to work for Red Gate full-time. They’re going to stay in control of the project and keep doing open source development work on Glimpse. In the medium term, we’re hoping to make paid-for products which plug into the free open source framework, especially in areas like performance profiling where we already have some deep technology. First, though, Glimpse needs to get from beta to a v1. Given the breakneck pace of new development, this should only be a month or so away. Supporting an open source project is a first for Red Gate, so we’re going to be working with Nik and Anthony, with the Glimpse community and even with other vendors to figure out what ‘great’ looks like from the a user perspective. Only one thing is certain: this technology deserves a wider audience than the 40,000 people who have already downloaded it, so please have a look and tell us what you think. You can hear more about what the Glimpse developers think on the Glimpse blog, and there are plenty more technical facts over at our product manager’s blog. If you have any questions or queries, please tweet with the #glimpse hashtag or contact the Glimpse team directly on [email protected]. [*That’s ”magic” in the Arthur C. Clarke “sufficiently advanced technology” sense, of course] Neil Davidson co-founder and Joint CEO Red Gate Software http://twitter.com/neildavidson

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Using SQL Source Control and Vault Professional Part 4

- by Ajarn Mark Caldwell

Two weeks ago I upgraded our installation of Fortress to the latest version, which is now named Vault Professional. This is the version of Vault (i.e. Vault Standard 5.1 / Vault Professional 5.1) that will be officially supported with Red-Gate SQL Source Control 2.1. While the folks at Red-Gate did a fantastic job of working with me to get SQL Source Control to work with the older Fortress version, we weren’t going to just sit on that. There are a couple of things that Vault Professional cleaned up for us, such as improved integration with Visual Studio 2010, so it was a win all around. Shortly after that upgrade, I received notice from Red-Gate that they had a new Early Access version of SQL Source Control available that included the ability to source control static data. The idea here is that you probably have a few fairly static lookup tables in your system, and those data values are similar in concept to source code, and should be versioned in your source control management system also. I agree with this, but please be wise…somebody out there is bound to try to use this feature as their disaster recovery for their entire database, and that is NOT the purpose. First off, you should never have your PROD (or LIVE, whatever you call it) system attached to source control. Source Control is for development, not for PROD systems. Second, use the features that are intended for this purpose, such as BACKUP and RESTORE. Laying that tangent aside, it is great that now you can include these critical values in your repository and make them part of a deployment process. As you would guess, SQL Source Control uses SQL Data Compare to create the data change scripts just like it uses SQL Compare to create the schema change scripts. Once again, they did a very good job with the integration to their other products. At this point we are really starting to see some good payback on our investment in the full SQL Developer Bundle. Those products were worth the investment back when we only used them sporadically for troubleshooting and DBA analysis, but now with SQL Source Control, they are becoming everyday-use products for the development team. I like this software (SQL Source Control) so much that I am about to break my own rules and distribute it to my team to use even though it is still in beta. This is the first time that I have approved the use of any beta software in a production scenario (actively building our next versions of internal software) but I predict that the usability and productivity gain of using SQL Source Control over manual scripting is worth the risk. Of course, I have also put this beta software through its paces pretty well to be comfortable with it, and Red-Gate has proven their responsiveness to issues that came up in my early beta testing, and so I am willing to bet on their continued support. Likewise, SourceGear, the maker of Vault Professional, has proven itself to me as well, and so the combination of SQL Source Control with Vault Professional is the new standard for my development team.

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Can a Printer Print White?

- by Jason Fitzpatrick

The vast majority of the time we all print on white media: white paper, white cardstock, and other neutral white surfaces. But what about printing white? Can modern printers print white and if not, why not? Read on as we explore color theory, printer design choices, and why white is the foundation of the printing process. Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-driven grouping of Q&A web sites. Image by Coiote O.; available as wallpaper here. The Question SuperUser reader Curious_Kid is well, curious, about printers. He writes: I was reading about different color models, when this question hit my mind. Can the CMYK color model generate white color? Printers use CMYK color mode. What will happen if I try to print a white colored image (rabbit) on a black paper with my printer? Will I get any image on the paper? Does the CMYK color model have room for white? The Answer SuperUser contributor Darth Android offers some insight into the CMYK process: You will not get anything on the paper with a basic CMYK inkjet or laser printer. The CMYK color mixing is subtractive, meaning that it requires the base that is being colored to have all colors (i.e., White) So that it can create color variation through subtraction: White - Cyan - Yellow = Green White - Yellow - Magenta = Red White - Cyan - Magenta = Blue White is represented as 0 cyan, 0 yellow, 0 magenta, and 0 black – effectively, 0 ink for a printer that simply has those four cartridges. This works great when you have white media, as “printing no ink” simply leaves the white exposed, but as you can imagine, this doesn’t work for non-white media. If you don’t have a base color to subtract from (i.e., Black), then it doesn’t matter what you subtract from it, you still have the color Black. [But], as others are pointing out, there are special printers which can operate in the CMYW color space, or otherwise have a white ink or toner. These can be used to print light colors on top of dark or otherwise non-white media. You might also find my answer to a different question about color spaces helpful or informative. Given that the majority of printer media in the world is white and printing pure white on non-white colors is a specialty process, it’s no surprise that home and (most) commercial printers alike have no provision for it. Have something to add to the explanation? Sound off in the the comments. Want to read more answers from other tech-savvy Stack Exchange users? Check out the full discussion thread here.

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Top 5 White Hat Techniques in SEO

SEO techniques that help your site to get better page rank in search engines can be both White Hat and Black Hat. White hat techniques are accepted as ethical and useful long term, while black hat methods forcibly manipulate page rankings which are either discarded or not preferred because they flout the ethical norms. You should know the difference between these two and select a firm that utilizes only white hat techniques.

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Graph Isomorphism > What kind of Graph is this?

- by oodavid

Essentially, this is a variation of Comparing Two Tree Structures, however I do not have "trees", but rather another type of graph. I need to know what kind of Graph I have in order to figure out if there's a Graph Isomorphism Special Case... As you can see, they are: Not Directed Not A Tree Cyclic Max 4 connections But I still don't know the correct terminology, nor the which Isomorphism algorithm to pursue, guidance appreciated.

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Using Open MQ as an Oracle CEP Event Source

- by seth.white

I helped an Oracle CEP customer recently who wanted to use Open MQ has an event source for their Oracle CEP application. In this case, the Oracle CEP application was being used to provide monitoring for an electronic commerce website, however, the steps for configuring Open MQ are entirely independent of the application logic. I thought I would list the configuration steps in a blog post in case they might help others in the future. Note that although the Oracle CEP documentation states that only WebLogic and Tibco JMS are "officially" supported, any JMS implementation that provides a Java client should work with Oracle CEP. The first step is to add an adapter to the application's EPN. This can be done in the usual way, using the Eclipse IDE. The end result is something like the following bit of configuration in the application's Spring application context. Note that the provider attribute value of 'jms-inbound' specifies that the out-of-the-box JMS adapter is being used. <wlevs:adapter id="helloworldAdapter" provider="jms-inbound"> </wlevs:adapter> Next, configure the inbound adapter so that it can connect to Open MQ in the Oracle CEP configuration file (config.xml). The snippet below provides an example of what this configuration should look like. The exact values specified for jndi-provider-url, jndi-factory, connection-jndi-name, destination-jndi-name elements will depend on your Open MQ configuration. For example , if the name of your Open MQ topic destination is 'ElectronicCommerceTopic', then you would specify that as the destination-jndi-name. The name of your Open MQ connection factory goes in the connection-jndi-name element. In my simple example, I also specify in event-type element so that the out-of-the-box JMS adapter will attempt to automatically convert incoming messages to events of type HelloWorldEvent. In a more complex application, one would configure a custom converter on the JMS adapter to convert from messages to events. The Oracle CEP 11.1.3 documentation describes how to do this. <jms-adapter> <name>helloworldAdapter</name> <event-type>HelloWorldEvent</event-type> <jndi-provider-url>file:///C:/Temp</jndi-provider-url> <jndi-factory>com.sun.jndi.fscontext.RefFSContextFactory</jndi-factory> <connection-jndi-name>YourJMSConnectionFactoryName</connection-jndi-name> <destination-jndi-name>YourJMSDestinationName</destination-jndi-name> </jms-adapter> Finally, one needs to package the client-side Open MQ jars so that the classes that they contain are available to the Oracle CEP runtime. The recommended way for doing this in the Oracle CEP 11.1.3 release is to package the classes as a library module or simply place them in the application bundle. The advantage of deploying the classes as a library module is that they are available to any application that wants to connect to Open MQ. In my case, I packaged the classes in my application bundle. A best practice when you want to include additional jars in your application bundle is to create a 'lib' directory in your Eclipse project and then copy the required jars into that directory. Then, use the support that Eclipse provides to add the jars to the bundle classpath (which makes the classes part of your application in the same way that regular application classes are), and export all of the classes from your application bundle so that they are available to the Oracle CEP server runtime. The screenshot below Illustrates how this is done in Eclipse. The bundle classpath contains two Open MQ jars and all packages in the jars are exported. Finally, import the javax.jms and javax.naming packages into the application module as these are needed by the Open MQ classes. The screenshot below shows the complete list of package imports for my sample application. Once you have completed these steps, you should be able to build and deploy your application and begin receiving inbound messages from Open MQ. 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Make alsamixer changes permanent

- by Mauricio Andrés

I have installed ubuntu GNOME 14.04 in my macbook Pro 13" mid 2012, and something is wrong with the headphones jack, a red led is on and it just can be turned off with the alsamixer command and muting a special section (I'm sorry for not remember the setting, I'm on OS X for work reasons) I already know how to fix it, but I want to know how to save the setting in the alsamixer, because with every reboot the red led is back. Thanks for the help.

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SQL Search- The Search and the Sequel

It started out as an experiment to try to explore different ways of creating a software tool that people would want. It ended up as a tool that Red Gate is giving away to the SQL Server community in return for the contribution to the project of so many of Red Gate's friends within the community. But was it easy to do? Bob Cramblitt and Richard Collins went to find out by talking to Tanya Joseph, who managed the project that turned the concept into a product.

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