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• Why aren't we programming on the GPU???

  - by Chris

  So I finally took the time to learn CUDA and get it installed and configured on my computer and I have to say, I'm quite impressed! Here's how it does rendering the Mandelbrot set at 1280 x 678 pixels on my home PC with a Q6600 and a GeForce 8800GTS (max of 1000 iterations): Maxing out all 4 CPU cores with OpenMP: 2.23 fps Running the same algorithm on my GPU: 104.7 fps And here's how fast I got it to render the whole set at 8192 x 8192 with a max of 1000 iterations: Serial implemetation on my home PC: 81.2 seconds All 4 CPU cores on my home PC (OpenMP): 24.5 seconds 32 processors on my school's super computer (MPI with master-worker): 1.92 seconds My home GPU (CUDA): 0.310 seconds 4 GPUs on my school's super computer (CUDA with static domain decomposition): 0.0547 seconds So here's my question - if we can get such huge speedups by programming the GPU instead of the CPU, why is nobody doing it??? I can think of so many things we could speed up like this, and yet I don't know of many commercial apps that are actually doing it. Also, what kinds of other speedups have you seen by offloading your computations to the GPU?

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• Validate a string in a table in SQL Server - CLR function or T-SQL

  - by Ashish Gupta

  I need to check If a column value (string) in SQL server table starts with a small letter and can only contain '_', '-', numbers and alphabets. I know I can use a SQL server CLR function for that. However, I am trying to implement that validation using a scalar UDF and could make very little here...I can use 'NOT LIKE', but I am not sure how to make sure I validate the string irrespective of the order of characters or in other words write a pattern in SQL for this. Am I better off using a SQL CLR function? Any help will be appreciated.. Thanks in advance Thank you everyone for their comments. This morning, I chose to go CLR function way. For the purpose of what I was trying to achieve, I created one CLR function which does the validation of an input string and have that called from a SQL UDF and It works well. Just to measure the performance of t-SQL UDF using SQL CLR function vs t- SQL UDF, I created a SQL CLR function which will just check if the input string contains only small letters, it should return true else false and have that called from a UDF (IsLowerCaseCLR). After that I also created a regular t-SQL UDF(IsLowerCaseTSQL) which does the same thing using the 'NOT LIKE'. Then I created a table (Person) with columns Name(varchar) and IsValid(bit) columns and populate that with names to test. Data :- 1000 records with 'Ashish' as value for Name column 1000 records with 'ashish' as value for Name column then I ran the following :- UPDATE Person Set IsValid=1 WHERE dbo.IsLowerCaseTSQL (Name) Above updated 1000 records (with Isvalid=1) and took less than a second. I deleted all the data in the table and repopulated the same with same data. Then updated the same table using Sql CLR UDF (with Isvalid=1) and this took 3 seconds! If update happens for 5000 records, regular UDF takes 0 seconds compared to CLR UDF which takes 16 seconds! I am very less knowledgeable on t-SQL regular expression or I could have tested my actual more complex validation criteria. But I just wanted to know, even I could have written that, would that have been faster than the SQL CLR function considering the example above. Are we using SQL CLR because we can implement we can implement lot richer logic which would have been difficult otherwise If we write in regular SQL. Sorry for this long post. I just want to know from the experts. Please feel free to ask if you could not understand anything here. Thank you again for your time.

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• UIScrollView and UIImage in it with paging enabled

  - by Infinity

  Hello guys! I need to display 10 - 1000 images on a UIScrollView. Paging is enabled. So every page of the scrollview is an image, it is an uiimage. I can load 10 images to 10 uiimages which stays in the memory, but with 1000 images I have problems on the iPhone or on the iPad. I am trying to unload and then load the images when I am doing scrolling. I every time displays 3 images. The current page image, and the -1 and +1 pages. When I am scrolling I unload the image and then load the next. With this method I have two problems. The scrolling is laggy and if I scroll very fast the images don't appear. Maybe is there any good solution for these problems? Can you suggest me one?

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• Algorithm to generate numerical concept hierarchy

  - by Christophe Herreman

  I have a couple of numerical datasets that I need to create a concept hierarchy for. For now, I have been doing this manually by observing the data (and a corresponding linechart). Based on my intuition, I created some acceptable hierarchies. This seems like a task that can be automated. Does anyone know if there is an algorithm to generate a concept hierarchy for numerical data? To give an example, I have the following dataset: Bangladesh 521 Brazil 8295 Burma 446 China 3259 Congo 2952 Egypt 2162 Ethiopia 333 France 46037 Germany 44729 India 1017 Indonesia 2239 Iran 4600 Italy 38996 Japan 38457 Mexico 10200 Nigeria 1401 Pakistan 1022 Philippines 1845 Russia 11807 South Africa 5685 Thailand 4116 Turkey 10479 UK 43734 US 47440 Vietnam 1042 for which I created the following hierarchy: LOWEST ( < 1000) LOW (1000 - 2500) MEDIUM (2501 - 7500) HIGH (7501 - 30000) HIGHEST ( 30000)

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• python MySQLdb got invalid syntax when trying to INSERT INTO table

  - by Michelle Jun Lee

  ## COMMENT OUT below just for reference "" cursor.execute (""" CREATE TABLE yellowpages ( business_id BIGINT(20) NOT NULL AUTO_INCREMENT, categories_name VARCHAR(255), business_name VARCHAR(500) NOT NULL, business_address1 VARCHAR(500), business_city VARCHAR(255), business_state VARCHAR(255), business_zipcode VARCHAR(255), phone_number1 VARCHAR(255), website1 VARCHAR(1000), website2 VARCHAR(1000), created_date datetime, modified_date datetime, PRIMARY KEY(business_id) ) """) "" ## TOP COMMENT OUT (just for reference) ## code website1g = "http://www.triman.com" business_nameg = "Triman Sales Inc" business_address1g = "510 E Airline Way" business_cityg = "Gardena" business_stateg = "CA" business_zipcodeg = "90248" phone_number1g = "(310) 323-5410" phone_number2g = "" website2g = "" cursor.execute (""" INSERT INTO yellowpages(categories_name, business_name, business_address1, business_city, business_state, business_zipcode, phone_number1, website1, website2) VALUES ('%s','%s','%s','%s','%s','%s','%s','%s','%s') """, (''gas-stations'', business_nameg, business_address1g, business_cityg, business_stateg, business_zipcodeg, phone_number1g, website1g, website2g)) cursor.close() conn.close() I keep getting this error File "testdb.py", line 51 """, (''gas-stations'', business_nameg, business_address1g, business_cityg, business_stateg, business_zipcodeg, phone_number1g, website1g, website2g)) ^ SyntaxError: invalid syntax any idea why? By the way, the up arrow is pointing to website1g (the b character) . Thanks for the help in advance

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• PreparedStatement

  - by Steel Plume

  Hello, in the case of using PreparedStatement with a single common connection without any pool, can I recreate an instance for every dml/sql operation mantaining the power of prepared statements? I mean: for (int i=0; i<1000; i++) { PreparedStatement preparedStatement = connection.prepareStatement(sql); preparedStatement.setObject(1, someValue); preparedStatement.executeQuery(); preparedStatement.close(); } instead of: PreparedStatement preparedStatement = connection.prepareStatement(sql); for (int i=0; i<1000; i++) { preparedStatement.clearParameters(); preparedStatement.setObject(1, someValue); preparedStatement.executeQuery(); } preparedStatement.close(); my question arises by the fact that I want to put this code into a multithreaded environment, can you give me some advice? thanks

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• Reusing a PreparedStatement multiple times

  - by Steel Plume

  Hello, in the case of using PreparedStatement with a single common connection without any pool, can I recreate an instance for every dml/sql operation mantaining the power of prepared statements? I mean: for (int i=0; i<1000; i++) { PreparedStatement preparedStatement = connection.prepareStatement(sql); preparedStatement.setObject(1, someValue); preparedStatement.executeQuery(); preparedStatement.close(); } instead of: PreparedStatement preparedStatement = connection.prepareStatement(sql); for (int i=0; i<1000; i++) { preparedStatement.clearParameters(); preparedStatement.setObject(1, someValue); preparedStatement.executeQuery(); } preparedStatement.close(); my question arises by the fact that I want to put this code into a multithreaded environment, can you give me some advice? thanks

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• SQL Joing on a one-to-many relationship

  - by Harley

  Ok, here was my original question; Table one contains ID|Name 1 Mary 2 John Table two contains ID|Color 1 Red 2 Blue 2 Green 2 Black I want to end up with is ID|Name|Red|Blue|Green|Black 1 Mary Y Y 2 John Y Y Y It seems that because there are 11 unique values for color and 1000's upon 1000's of records in table one that there is no 'good' way to do this. So, two other questions. Is there an efficient way to get this result? I can then create a crosstab in my application to get the desired result. ID|Name|Color 1 Mary Red 1 Mary Blue 2 John Blue 2 John Green 2 John Black If I wanted to limit the number of records returned how could I do something like this? Where ((color='blue') AND (color<>'red' OR color<>'green')) So using the above example I would then get back ID|Name|Color 1 Mary Blue 2 John Blue 2 John Black I connect to Visual FoxPro tables via ADODB. Thanks!

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• Validate a string in a table in SQL Server - CLR function or T-SQL (Question updated)

  - by Ashish Gupta

  I need to check If a column value (string) in SQL server table starts with a small letter and can only contain '_', '-', numbers and alphabets. I know I can use a SQL server CLR function for that. However, I am trying to implement that validation using a scalar UDF and could make very little here...I can use 'NOT LIKE', but I am not sure how to make sure I validate the string irrespective of the order of characters or in other words write a pattern in SQL for this. Am I better off using a SQL CLR function? Any help will be appreciated.. Thanks in advance Thank you everyone for their comments. This morning, I chose to go CLR function way. For the purpose of what I was trying to achieve, I created one CLR function which does the validation of an input string and have that called from a SQL UDF and It works well. Just to measure the performance of t-SQL UDF using SQL CLR function vs t- SQL UDF, I created a SQL CLR function which will just check if the input string contains only small letters, it should return true else false and have that called from a UDF (IsLowerCaseCLR). After that I also created a regular t-SQL UDF(IsLowerCaseTSQL) which does the same thing using the 'NOT LIKE'. Then I created a table (Person) with columns Name(varchar) and IsValid(bit) columns and populate that with names to test. Data :- 1000 records with 'Ashish' as value for Name column 1000 records with 'ashish' as value for Name column then I ran the following :- UPDATE Person Set IsValid=1 WHERE dbo.IsLowerCaseTSQL (Name) Above updated 1000 records (with Isvalid=1) and took less than a second. I deleted all the data in the table and repopulated the same with same data. Then updated the same table using Sql CLR UDF (with Isvalid=1) and this took 3 seconds! If update happens for 5000 records, regular UDF takes 0 seconds compared to CLR UDF which takes 16 seconds! I am very less knowledgeable on t-SQL regular expression or I could have tested my actual more complex validation criteria. But I just wanted to know, even I could have written that, would that have been faster than the SQL CLR function considering the example above. Are we using SQL CLR because we can implement we can implement lot richer logic which would have been difficult otherwise If we write in regular SQL. Sorry for this long post. I just want to know from the experts. Please feel free to ask if you could not understand anything here. Thank you again for your time.

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• JavaScript setTimeout setInterval within one function

  - by dagoof

  I think I might be overtired but I cannot for the life of me make sense of this, and I think it's due to a lack of knowledge of javascript var itv=function(){ return setInterval(function(){ sys.puts('interval'); }, 1000); } var tout=function(itv){ return setTimeout(function(){ sys.puts('timeout'); clearInterval(itv); }, 5500); } With these two functions I can call a=tout(itv()); and get a looping timer to run for 5.5 seconds and then exit, essentially. By my logic, this should work but it simply is not var dotime=function(){ return setTimeout(function(){ clearInterval(function(){ return setInterval(function(){ sys.puts("interval"); }, 1000); }); }, 5500); } any insight in this matter would be appreciated.

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• get equation from XML, AS3

  - by VideoDnd

  There's an variable in my swf I want to receive XML. It's an integer value in the form of an equation. How do I receive the XML value for 'formatcount'? My Variable //Variable I want to grab XML<br> //formatcount=int('want xml value to go here'); formatcount=int(count*count/100); Path formatcount = myXML.FORMATCOUNT.text() My XML <?xml version="1.0" encoding="utf-8"?> <SESSION> <TIMER TITLE="speed">1000</TIMER> <COUNT TITLE="starting position">10000</COUNT> <FORMATCOUNT TITLE="ramp">count*count/1000</FORMATCOUNT> </SESSION>

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• images are getting clipped when Jquery animate opacity is used in IE

  - by Raja

  I use the function given below: function rotate() { //Get the first image var current = ($('div#rotator ul li.show') ? $('div#rotator ul li.show') : $('div#rotator ul li:first')); //Get next image, when it reaches the end, rotate it back to the first image var next = ((current.next().length) ? ((current.next().hasClass('show')) ? $('div#rotator ul li:first') : current.next()) : $('div#rotator ul li:first')); //Set the fade in effect for the next image, the show class has higher z-index next.css({ opacity: 0.0 }) .addClass('show') .animate({ opacity: 1.0 }, 1000); //Hide the current image current.animate({ opacity: 0.0 }, 1000) .removeClass('show'); }; It does a slide show of images. It works perfect on Firefox and Google Chrome but clips the images in IE 7 and IE 8. Any help is much appreciated. Thanks in advance.

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• Why can't the JVM just make autoboxing "just work"?

  - by Pyrolistical

  Autoboxing is rather scary. While I fully understand the difference between == and .equals I can't but help have the follow bug the hell out of me: final List<Integer> foo = Arrays.asList(1, 1000); final List<Integer> bar = Arrays.asList(1, 1000); System.out.println(foo.get(0) == bar.get(0)); System.out.println(foo.get(1) == bar.get(1)); That prints true false Why did they do it this way? It something to do with cached Integers, but if that is the case why don't they just cache all Integers used by the program? Or why doesn't the JVM always auto unbox to primitive? Printing false false or true true would have been way better.

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• MFC CTreeCtrl max visible item text length

  - by Steven smethurst

  Hello I have an application that outputs large amounts of text data to an MFC tree control. When I call SetItemText() with a long string (larger then 1000+ char) only the first ~250 chars are displayed in the control. But when I call GetItemText() on the item the entire string is returned (1000+ chars) My questions are; Is there a MAX visible string length for a MFC tree control? Is there any way to increase the visible limit? I have included example text code below // In header CTreeCtrl m_Tree; // In .cpp file void CTestDlg::OnDiagnosticsDebug() { CString csText; CString csItemText; csText.Format( _T("0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789") ); for( int i = 0 ; i < 10 ; i ++ ) { csItemText += csText ; } bool b = m_Tree.SetItemText( m_Tree.GetRootItem(), csItemText ); return ; }

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• Adding UIView animation mysteriously changes starting frame

  - by clozach

  I'm working on an app that shows a thumbnail of a photo taken by the user. In order to show a seemless transition from the full-screen image shown in the UIImagePickerController to the thumbnail, I set the frame on my copy of the image to [[UIScreen mainScreen] bounds] and then change the frame to match the frame of an invisible button. (The button allows users to re-take their photo by tapping the thumbnail image.) The trouble is that the starting x-origin of my UIImageView (imageView) is mysteriously starting nearly offscreen to the left: As you can see from the alert, the imageView purports to be located at (0,0), yet it's displaying at something like (-255,0). Here's the code: CGRect frame = [[UIScreen mainScreen] bounds]; imageView.frame = frame; [[[[UIAlertView alloc] initWithTitle:@"Yo!" message:[NSString stringWithFormat:@"starting frame:%@",NSStringFromCGRect(imageView.frame)] delegate:nil cancelButtonTitle:@"K." otherButtonTitles:nil] autorelease] show]; // Slide the enlarged image seamlessly "onto" the photo button [UIView beginAnimations:nil context:nil]; [UIView setAnimationDuration:1000]; [UIView setAnimationDelay:.5]; imageView.frame = pictureButton.frame; [UIView commitAnimations]; As if to taunt me, the image actually does go full screen if I comment out the animation code: CGRect frame = [[UIScreen mainScreen] bounds]; imageView.frame = frame; [[[[UIAlertView alloc] initWithTitle:@"Yo!" message:[NSString stringWithFormat:@"starting frame:%@",NSStringFromCGRect(imageView.frame)] delegate:nil cancelButtonTitle:@"K." otherButtonTitles:nil] autorelease] show]; // Slide the enlarged image seamlessly "onto" the photo button // [UIView beginAnimations:nil context:nil]; // [UIView setAnimationDuration:1000]; // [UIView setAnimationDelay:.5]; // // imageView.frame = pictureButton.frame; // // [UIView commitAnimations]; (Note: animationDuration will of course be set to something more like .5 in production, not 1000 seconds.) Update — Other weirdness worth mentioning in case it's relevant: It turns out the offset changes depending on the orientation of the camera when the photo was taken. If I take the picture with the phone upside-down, for instance, then the image gets offset vertically as well as horizontally. The picker seems to be filling the image's imageOrientation incorrectly: I have to hold the phone sideways, Home button on the left, to get an image with UIImageOrientationUp. At one point I experimented with setting imageView.clipsToBounds = YES;, which revealed that my image view's frame is in fact correct. Rather, it's the UIImage's placement within the UIImageView that gets offset. Fwiw, the image view's contentMode is the default, UIViewContentModeScaleToFill.

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• Creating DescriptionAttribute on Enumeration Field using System.Reflection.Emit

  - by Manish Sinha

  I have a list of strings which are candidates for Enumerations values. They are Don't send diffs 500 lines 1000 lines 5000 lines Send entire diff The problem is that spaces, special characters are not a part of identifiers and even cannot start with a number, so I would be sanitizing these values to only chars, numbers and _ To keep the original values I thought of putting these strings in the DescriptionAttribute, such that the final Enum should look like public enum DiffBehvaiour { [Description("Don't send diffs")] Dont_send_diffs, [Description("500 lines")] Diff_500_lines, [Description("1000 lines")] Diff_1000_lines, [Description("5000 lines")] Diff_5000_lines, [Description("Send entire diff")] Send_entire_diff } Then later using code I will retrieve the real string associated with the enumeration value, so that the correct string can be sent back the web service to get the correct resource. I want to know how to create the DescriptionAttribute using System.Reflection.Emit Basically the question is where and how to store the original string so that when the Enumeration value is chosen, the corresponding value can be retrieved. I am also interested in knowing how to access DescriptionAttribute when needed.

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• 16 bit processor , memory addressing and memory cells

  - by Zia ur Rahman

  Suppose the accumulater register of the processor is of 16 bit , now we can call this processor as 16 bit processor, that is this processor supports 16 bit addressing. now my question is how we can calculate the number of memory cells that can be addressed by 16 bit addressing? according to my calculation 2 to the power 16 becomes 65055 it means the memory have 65055 cells now if we take 1KB=1000 Bytes then this becomes 65055/1000=65.055 now this means that 65 kilo bytes memory can be used with the processor having 16 bit addressing. now if we take 1KB=1024 Bytes then this becomes 65055/1024=63.5 ,it means that 63 kilo bytes memory can be used with this processor, but people say that 64 kilo bytes memory can be used. Now tell me am i right or wrong and why i am wrong why people say that 64kb memory can be used with the processor having 16 bit addressing?

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• RegEx for MetaMap in Java

  - by Christian

  MetaMap files have following lines: mappings([map(-1000,[ev(-1000,'C0018017','Objective','Goals',[objective],[inpr],[[[1,1],[1,1],0]],yes,no)])]). The format is explained as mappings( [map(negated overall score for this mapping, [ev(negated candidate score,'UMLS concept ID','UMLS concept','preferred name for concept - may or may not be different', [matched word or words lowercased that this candidate matches in the phrase - comma separated list], [semantic type(s) - comma separated list], [match map list - see below],candidate involved with head of phrase - yes or no, is this an overmatch - yes or no ) ] ) ] ). I want to run a RegEx query in java that gives me the Strings 'UMLS concept ID', semantic type and match map list. Is RegEx the right tool or what is the most efficent way to accomplish this in Java?

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• javascript setTimeout() first argument: expression error

  - by Jonah

  function Timer() { this.initialTime = 0; this.timeStart = null; this.getTotalTime = function() { timeEnd = new Date(); diff = timeEnd.getTime() - this.timeStart.getTime(); return diff+this.initialTime; }; this.formatTime = function() { interval = new Date(this.getTotalTime()); return interval.getHours() + ":" + interval.getMinutes() + ":" + interval.getSeconds(); }; this.start = function() { this.timeStart = new Date(); setTimeout("this.updateTime()", 1000); }; this.updateTime = function() { alert(this.formatTime()); setTimeout("this.updateTime()", 1000); }; } timer = new Timer(); timer.start(); I am getting an error: this.updateTime is not a function Any ideas? Thanks

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• Code golf: the Mandelbrot set

  - by Stefano Borini

  Usual rules for the code golf. Here is an implementation in python as an example from PIL import Image im = Image.new("RGB", (300,300)) for i in xrange(300): print "i = ",i for j in xrange(300): x0 = float( 4.0*float(i-150)/300.0 -1.0) y0 = float( 4.0*float(j-150)/300.0 +0.0) x=0.0 y=0.0 iteration = 0 max_iteration = 1000 while (x*x + y*y <= 4.0 and iteration < max_iteration): xtemp = x*x - y*y + x0 y = 2.0*x*y+y0 x = xtemp iteration += 1 if iteration == max_iteration: value = 255 else: value = iteration*10 % 255 print value im.putpixel( (i,j), (value, value, value)) im.save("image.png", "PNG") The result should look like this Use of an image library is allowed. Alternatively, you can use ASCII art. This code does the same for i in xrange(40): line = [] for j in xrange(80): x0 = float( 4.0*float(i-20)/40.0 -1.0) y0 = float( 4.0*float(j-40)/80.0 +0.0) x=0.0 y=0.0 iteration = 0 max_iteration = 1000 while (x*x + y*y <= 4.0 and iteration < max_iteration): xtemp = x*x - y*y + x0 y = 2.0*x*y+y0 x = xtemp iteration += 1 if iteration == max_iteration: line.append(" ") else: line.append("*") print "".join(line) The result ******************************************************************************** ******************************************************************************** ******************************************************************************** ******************************************************************************** ******************************************************************************** ******************************************************************************** ******************************************************************************** ******************************************************************************** ******************************************************************************** ******************************************************************************** **************************************** *************************************** **************************************** *************************************** **************************************** *************************************** **************************************** *************************************** **************************************** *************************************** **************************************** *************************************** **************************************** *************************************** *************************************** ************************************** ************************************* ************************************ ************************************ *********************************** *********************************** ********************************** ************************************ *********************************** ************************************* ************************************ *********************************** ********************************** ******************************** ******************************* **************************** *************************** ***************************** **************************** **************************** *************************** ************************ * * *********************** *********************** * * ********************** ******************** ******* ******* ******************* **************************** *************************** ****************************** ***************************** ***************************** * * * **************************** ******************************************************************************** ******************************************************************************** ******************************************************************************** ******************************************************************************** ******************************************************************************** ********************************************************************************

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• How can i get this ASP.NET MVC SelectList to work?

  - by Pure.Krome

  Hi folks, I create a selectList in my controller, to display in the view. I'm trying to create it on the fly, sorta thing .. like this... myViewData.PageOptionsDropDown = new SelectList(new [] {"10", "15", "25", "50", "100", "1000"}, "15"); It compiles, but the output is bad... <select id="PageOptionsDropDown" name="PageOptionsDropDown"> <option>10</option> <option>15</option> <option>25</option> <option>50</option> <option>100</option> <option>1000</option> </select> Notice how no item is selected? How can i fix this?? Update Just bumping this ... issue still outstanding :(

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• understand SimpleTimeZone and DST Test

  - by Cygnusx1

  I Have an issue with the use of SimpleTimeZone class in Java. First, the JavaDoc is nice but not quite easy to understand in regards of the start and end Rules. But with the help of some example found on the web, i managed to get it right (i still don't understand why 8 represents the second week of a month in day_of_month!!! but whatever) Now i have written a simple Junit test to validate what i understand: package test; import static org.junit.Assert.assertEquals; import java.sql.Timestamp; import java.util.Calendar; import java.util.GregorianCalendar; import java.util.SimpleTimeZone; import org.apache.log4j.Logger; import org.junit.Test; public class SimpleTimeZoneTest { Logger log = Logger.getLogger(SimpleTimeZoneTest.class); @Test public void testTimeZoneWithDST() throws Exception { Calendar testDateEndOut = new GregorianCalendar(2012, Calendar.NOVEMBER, 4, 01, 59, 59); Calendar testDateEndIn = new GregorianCalendar(2012, Calendar.NOVEMBER, 4, 02, 00, 00); Calendar testDateStartOut = new GregorianCalendar(2012, Calendar.MARCH, 11, 01, 59, 59); Calendar testDateStartIn = new GregorianCalendar(2012, Calendar.MARCH, 11, 02, 00, 00); SimpleTimeZone est = new SimpleTimeZone(-5 * 60 * 60 * 1000, "EST"); est.setStartRule(Calendar.MARCH, 8, -Calendar.SUNDAY, 2 * 60 * 60 * 1000); est.setEndRule(Calendar.NOVEMBER, 1, Calendar.SUNDAY, 2 * 60 * 60 * 1000); Calendar theCal = new GregorianCalendar(est); theCal.setTimeInMillis(testDateEndOut.getTimeInMillis()); log.info(" Cal date = " + new Timestamp(theCal.getTimeInMillis()) + " : " + theCal.getTimeZone().getDisplayName()); log.info(" Cal use DST = " + theCal.getTimeZone().useDaylightTime()); log.info(" Cal In DST = " + theCal.getTimeZone().inDaylightTime(theCal.getTime())); log.info("offset = " + theCal.getTimeZone().getOffset(theCal.getTimeInMillis())); log.info("DTS offset= " + theCal.getTimeZone().getDSTSavings()); assertEquals("End date Should be In DST", true, theCal.getTimeZone().inDaylightTime(theCal.getTime())); theCal.setTimeInMillis(testDateEndIn.getTimeInMillis()); log.info(" Cal date = " + new Timestamp(theCal.getTimeInMillis()) + " : " + theCal.getTimeZone().getDisplayName()); log.info(" Cal use DST = " + theCal.getTimeZone().useDaylightTime()); log.info(" Cal In DST = " + theCal.getTimeZone().inDaylightTime(theCal.getTime())); log.info("offset = " + theCal.getTimeZone().getOffset(theCal.getTimeInMillis())); log.info("DTS offset= " + theCal.getTimeZone().getDSTSavings()); assertEquals("End date Should be Out DST", false, theCal.getTimeZone().inDaylightTime(theCal.getTime())); theCal.setTimeInMillis(testDateStartIn.getTimeInMillis()); log.info(" Cal date = " + new Timestamp(theCal.getTimeInMillis()) + " : " + theCal.getTimeZone().getDisplayName()); log.info(" Cal use DST = " + theCal.getTimeZone().useDaylightTime()); log.info(" Cal In DST = " + theCal.getTimeZone().inDaylightTime(theCal.getTime())); log.info("offset = " + theCal.getTimeZone().getOffset(theCal.getTimeInMillis())); log.info("DTS offset= " + theCal.getTimeZone().getDSTSavings()); assertEquals("Start date Should be in DST", true, theCal.getTimeZone().inDaylightTime(theCal.getTime())); theCal.setTimeInMillis(testDateStartOut.getTimeInMillis()); log.info(" Cal date = " + new Timestamp(theCal.getTimeInMillis()) + " : " + theCal.getTimeZone().getDisplayName()); log.info(" Cal use DST = " + theCal.getTimeZone().useDaylightTime()); log.info(" Cal In DST = " + theCal.getTimeZone().inDaylightTime(theCal.getTime())); log.info("offset = " + theCal.getTimeZone().getOffset(theCal.getTimeInMillis())); log.info("DTS offset= " + theCal.getTimeZone().getDSTSavings()); assertEquals("Start date Should be Out DST", false, theCal.getTimeZone().inDaylightTime(theCal.getTime())); } } Ok, i want to test the date limits to see if the inDaylightTime return the right thing! So, my rules are : DST start the second sunday of March at 2am DST end the first sunday of november at 2am In 2012 (now) this give us the march 11 at 2am and November 4 at 2am You can see my test dates are set properly!!! Well here is the output of my test run: 2012-11-01 18:22:44,344 INFO [test.SimpleTimeZoneTest] - < Cal date = 2012-11-04 01:59:59.0 : Eastern Standard Time> 2012-11-01 18:22:44,345 INFO [test.SimpleTimeZoneTest] - < Cal use DST = true> 2012-11-01 18:22:44,345 INFO [test.SimpleTimeZoneTest] - < Cal In DST = false> 2012-11-01 18:22:44,345 INFO [test.SimpleTimeZoneTest] - <offset = -18000000> 2012-11-01 18:22:44,345 INFO [test.SimpleTimeZoneTest] - <DTS offset= 3600000> My first assert just fails and tell me that 2012-11-04 01:59:59 is not inDST... !!!!??? If i put 2012-11-04 00:59:59, the test pass! This 1 hour gap just puzzle me... can anyone explain this behavior? Oh, btw, if anyone could elaborate on the : est.setStartRule(Calendar.MARCH, 8, -Calendar.SUNDAY, 2 * 60 * 60 * 1000); Why 8 means second week of march... and the -SUNDAY. I can't figure out this thing on a real calendar example!!! Thanks

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• Simple MySQL Query taking 45 seconds (Gets a record and its "latest" child record)

  - by Brian Lacy

  I have a query which gets a customer and the latest transaction for that customer. Currently this query takes over 45 seconds for 1000 records. This is especially problematic because the script itself may need to be executed as frequently as once per minute! I believe using subqueries may be the answer, but I've had trouble constructing it to actually give me the results I need. SELECT customer.CustID, customer.leadid, customer.Email, customer.FirstName, customer.LastName, transaction.*, MAX(transaction.TransDate) AS LastTransDate FROM customer INNER JOIN transaction ON transaction.CustID = customer.CustID WHERE customer.Email = '".$email."' GROUP BY customer.CustID ORDER BY LastTransDate LIMIT 1000 I really need to get this figured out ASAP. Any help would be greatly appreciated!

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• Setting Curl's Timeout in PHP

  - by Moki

  I'm running a curl request on an eXist database through php. The dataset is very large, and as a result, the database consistently takes a long amount of time to return an XML response. To fix that, we set up a curl request, with what is supposed to be a long timeout. $ch = curl_init(); $headers["Content-Length"] = strlen($postString); $headers["User-Agent"] = "Curl/1.0"; curl_setopt($ch, CURLOPT_URL, $requestUrl); curl_setopt($ch, CURLOPT_HEADER, false); curl_setopt($ch, CURLOPT_HTTPHEADER, $headers); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); curl_setopt($ch, CURLOPT_USERPWD, 'admin:'); curl_setopt($ch,CURLOPT_TIMEOUT,1000); $response = curl_exec($ch); curl_close($ch); However, the curl request consistently ends before the request is completed (<1000 when requested via a browser). Does anyone know if this is the proper way to set timeouts in curl?

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• Why does using ASP.NET OutputCache keep returning a 200 OK, not a 304 Not Modified?

  - by Pure.Krome

  Hi folks, i have a simple aspx page. Here's the top of it:- <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Foo.aspx.cs" Inherits="Foo" %> <%@ OutputCache Duration="3600" VaryByParam="none" Location="Any" %> Now, every time I hit the page in FireFox (either hit F5 or hit enter in the url bar) I keep getting a 200 OK response. Here's a sample reply from FireBug :- Request Headers:- GET /sitemap.xml HTTP/1.1 Host: localhost.foo.com.au User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-GB; rv:1.9.2) Gecko/20100115 Firefox/3.6 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-au,en-gb;q=0.7,en;q=0.3 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 115 Connection: keep-alive Cookie: <snipped> If-Modified-Since: Tue, 01 Jun 2010 07:35:17 GMT If-None-Match: "" Cache-Control: max-age=0 Response Headers:- HTTP/1.1 200 OK Cache-Control: public Content-Type: text/xml; charset=utf-8 Expires: Tue, 01 Jun 2010 08:35:17 GMT Last-Modified: Tue, 01 Jun 2010 07:35:17 GMT Etag: "" Server: Microsoft-IIS/7.5 X-Powered-By: UrlRewriter.NET 2.0.0 X-AspNet-Version: 4.0.30319 Date: Tue, 01 Jun 2010 07:35:20 GMT Content-Length: 775 Firebug Cache tab:- Last Modified Tue Jun 01 2010 17:35:20 GMT+1000 (AUS Eastern Standard Time) Last Fetched Tue Jun 01 2010 17:35:20 GMT+1000 (AUS Eastern Standard Time) Expires Tue Jun 01 2010 18:35:17 GMT+1000 (AUS Eastern Standard Time) Data Size 775 Fetch Count 105 Device disk Now, if i try it in Fiddler using the Request Builder (and no extra data) I also keep getting the same 200 OK reply. Request Headers:- GET http://localhost.foo.com.au/sitemap.xml HTTP/1.1 User-Agent: Fiddler Host: foo.com.au Response Headers:- HTTP/1.1 200 OK Cache-Control: public Content-Type: text/xml; charset=utf-8 Expires: Tue, 01 Jun 2010 07:58:00 GMT Last-Modified: Tue, 01 Jun 2010 06:58:00 GMT ETag: "" Server: Microsoft-IIS/7.5 X-Powered-By: UrlRewriter.NET 2.0.0 X-AspNet-Version: 4.0.30319 Date: Tue, 01 Jun 2010 06:59:16 GMT Content-Length: 775 It looks like it's asking to cache it but it's not :( Server is a localhost IIS7.5 on Win7. (as listed in the Response data). Can anyone see what I'm doing wrong?

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