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• c#: how do i subtract two dates?

  - by every_answer_gets_a_point

  here's my code: DateTime date1 = new DateTime(byear, bmonth, bday, 0, 0, 0); DateTime datenow = DateTime.Now; DateTime date2 = datenow - date1 on the last line i am getting Error 1 Cannot implicitly convert type 'System.TimeSpan' to 'System.DateTime' ow do i subtract two dates?

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• C# problem with two threads and hardware access

  - by mack369

  I'm creating an application which communicates with the device via FT2232H USB/RS232 converter. For communication I'm using FTD2XX_NET.dll library from FTDI website. I'm using two threads: first thread continuously reads data from the device the second thread is the main thread of the Windows Form Application I've got a problem when I'm trying to write any data to the device while the receiver's thread is running. The main thread simply hangs up on ftdiDevice.Write function. I tried to synchronize both threads so that only one thread can use Read/Write function at the same time, but it didn't help. Below code responsible for the communication. Note that following functions are methods of FtdiPort class. Receiver's thread private void receiverLoop() { if (this.DataReceivedHandler == null) { throw new BackendException("dataReceived delegate is not set"); } FTDI.FT_STATUS ftStatus = FTDI.FT_STATUS.FT_OK; byte[] readBytes = new byte[this.ReadBufferSize]; while (true) { lock (FtdiPort.threadLocker) { UInt32 numBytesRead = 0; ftStatus = ftdiDevice.Read(readBytes, this.ReadBufferSize, ref numBytesRead); if (ftStatus == FTDI.FT_STATUS.FT_OK) { this.DataReceivedHandler(readBytes, numBytesRead); } else { Trace.WriteLine(String.Format("Couldn't read data from ftdi: status {0}", ftStatus)); Thread.Sleep(10); } } Thread.Sleep(this.RXThreadDelay); } } Write function called from main thread public void Write(byte[] data, int length) { if (this.IsOpened) { uint i = 0; lock (FtdiPort.threadLocker) { this.ftdiDevice.Write(data, length, ref i); } Thread.Sleep(1); if (i != (int)length) { throw new BackendException("Couldnt send all data"); } } else { throw new BackendException("Port is closed"); } } Object used to synchronize two threads static Object threadLocker = new Object(); Method that starts the receiver's thread private void startReceiver() { if (this.DataReceivedHandler == null) { return; } if (this.IsOpened == false) { throw new BackendException("Trying to start listening for raw data while disconnected"); } this.receiverThread = new Thread(this.receiverLoop); //this.receiverThread.Name = "protocolListener"; this.receiverThread.IsBackground = true; this.receiverThread.Start(); } The ftdiDevice.Write function doesn't hang up if I comment following line: ftStatus = ftdiDevice.Read(readBytes, this.ReadBufferSize, ref numBytesRead);

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• How to display two-rows bracket in Latex?

  - by niko

  Hi, Does anyone know how to modify the following string in order to display the two-lines bracket? str = '$$c_i =\{\begin{array}{l l} 1 \quad L\left(Q_i\right) < 0 \\ 0 \quad L\left(Q_i\right) \geq 0 \\ \end{array}$$'; The current output is the following: The sign '{' has to embrace both rows (1 and 0).

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• Building two different versions a given war with maven profiles and filtering from eclipse

  - by balteo

  I am trying to use maven profiles and filtering in order to produce two different versions of a given web archive (war): A first one for local deployment to my local machine on localhost A second one for remote deployment to cloudfoundry There are a number of properties that differ according to whether the app is deployed to my local machine or to cloudfoundry. Of course the difficult bit is that I am trying to do all this from STS/Eclipse and deploy from Eclipse to my local tomcat and to cloudfoundry... Can anyone please provide advice, tips or suggestions?

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• Can we have Same Delegate for Two Events

  - by Asim Sajjad

  Can we have same delegate for two events ? which have same number of input parameters? or delegate and the events have one to one relation ?

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• Need to combine common result of two select statements

  - by Anup

  i have to select the common coloumns c1 ,c2,c3 from result of two sql satements. 1) select c1, c2, c3,count(c3) from (select * from form_name where data_created >'1273446000' and data_creazione<'1274569200') group by c1,c2, c3 having count(c3)>1 2) select c1, c2, c3,count(c3) from (select * from form_name where data_created>'1272236400' and data_creazione<'1274569200') group by c1,c2, c3 having count(c3)>2 I need to select c1,c2,c3 all same and common found in both the result of query. how could this be done...could anyone help please?

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• How do I add values from two seperate querys in SQL

  - by fishhead

  Below is my attempt at addinf two values from seperate select statments...it's not working...I can't see why. Looking for some direction thanks select (v1.Value + v2.Value) as total from ( (Select Max(Value) as [Value] from History WHERE Datetime>='Apr 11 2010 6:05AM' and Datetime<='Apr 11 2010 6:05PM' and Tagname ='RWQ272017DTD' ) as v1 (Select Max(Value) as [Value] from History WHERE Datetime>='Apr 11 2010 6:05AM' and Datetime<='Apr 11 2010 6:05PM' and Tagname ='RU282001DTD' ) as v2 ) boy do I feel foolish...I asked the same question a few days ago...now I can't delete this.

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• The intersection of two sorted arrays.

  - by user288609

  Given two sorted arrays: A and B. The size of array A is La and the size of array B is Lb. How to find the intersection of A and B? If La is much bigger than Lb, then will there be any difference for the intersection finding algorithm?

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• Video Capture API remove dialog when capturing from two cameras

  - by sqlmaster

  Hi , I am trying to capture images from two cameras using avicap32.dll messages.I am able to capture images with the first camera but when the second camera start o capture it shows me the dialog "Select a video device".My application dosn't have interaction with the user so I need to select the second camera programatically. can anyone help me?

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• Play two videos with MPMoviePlayerView Controller

  - by Juanjo Guevara

  Hello, I am developing an application for IPAD and I need to play two videos one after another but can not find how. I'm using MPMoviePlayerViewController to do it and do not know how to launch a share after the first video to be played and start the second. Can someone help?

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• PHP Compare Two Arrays?

  - by Sjwdavies

  I'm trying to compare two entries in a database, so when a user makes a change, I can fetch both database entries and compare them to see what the user changed, so I would have an output similar to: User changed $fieldName from $originalValue to $newValue I've looked into this and came accross array_diff but it doesn't give me the output format I need. Before I go ahead and write a function that does this, and returns it as a nice $mtextFormatDifferenceString, can anyone point me in the direction of a solution that already does this? I don't want to re-invent the wheel..

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• XOR of Two GraphicsBuffer in c#

  - by Arman

  I have two GraphicsBuffer in c#, I want to take XOR of both the buffers and stored in third variable. Kindly guide me so that I can make it possible.

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• Removing last two chars from each line in a text file

  - by syker

  How do I remove the last two chars from each line in a text file using just Linux commands? Also my file seems to have weird ^A delimiters in it. What char does ^A correspond to?

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• Sorting table data across two table sets with jquery tablesorter

  - by Peter

  I am using jquery table sorter and have two tables. Instead of sorting the data just in the first table, could there be a way to combine the data in the second table and sort both? As an example, sorting column 1 on table 1 OR 2, will result in: //ORIGINAL //RESULT TABLE 1 TABLE 1 col1 | col2 col1 | col2 1 | 1 1 | 1 3 | 3 2 | 2 5 | 5 3 | 3 TABLE 2 TABLE 2 col1 | col 2 col1 | col 2 2 | 2 4 | 4 4 | 4 5 | 5 6 | 6 6 | 6

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• How do you rotate a two dimensional array?

  - by swilliams

  Inspired by Raymond Chen's post, say you have a 4x4 two dimensional array, write a function that rotates it 90 degrees. Raymond links to a solution in pseudo code, but I'd like to see some real world stuff. [1][2][3][4] [5][6][7][8] [9][0][1][2] [3][4][5][6] Becomes: [3][9][5][1] [4][0][6][2] [5][1][7][3] [6][2][8][4] Update: Nick's answer is the most straightforward, but is there a way to do it better than n^2? What if the matrix was 10000x10000?

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• Efficient way to manipulate large powers of two

  - by bguiz

  The most efficient way to code powers of two is by bit shifting of integers. 1 << n gives me 2^(n-1) However, if I have a number that is larger than the largest value allowed in an int, what can I use to efficiently manipulate powers of 2?

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• Comparing two objects that are the same in MbUnit

  - by Coppermill

  From MBUnit I am trying to check if the values of two objects are the same using Assert.AreSame(RawDataRow, result); However I am getting the following fail: ====================== Expected Value & Actual Value : {RawDataRow: CentreID = "CentreID1", CentreLearnerRef = "CentreLearnerRef1", ContactID = 1, DOB = 2010-05-05T00:00:00.0000000, Email = "Email1", ErrorCodes = "ErrorCodes1", ErrorDescription = "ErrorDescription1", FirstName = "FirstName1"} Remark : Both values look the same when formatted but they are distinct instances. ====================== I don't want to have to go through each property, can I do this from MbUnit

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• JQuery: combine two jq selectors

  - by Bruno

  Hi there. Im sure the solution is simple but I cant figure it out :( I need to combine two jquery selectors in one selector: $(this) + $('input[type=text]:first') $(this) is e.g div#selected so the result should be: $('div#selected input[type=text]:first').focus(); How to do?

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• Iterating Collection In Two Threads

  - by ChloeRadshaw

  This question relates both to C# and Java If you have a collection which is not modified and that collection reference is shared between two threads what happens when you iterate on each thread?? ThreadA: Collection.iterator ThreadA: Collection.moveNext ThreadB: Collection.iterator ThreadB: Collection.moveNext Will threadB see the first element? Is the iterator always reset when it is requested? What happens if this is interleaved so movenext and item is interleaved? Is there a danger that you dont process all elements??

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• show a view on two different url in a mvc 2 website

  - by RICH KID SMART KID

  in my website i want to show a page on two different location ex: for page 3 domain.com/index/3 domain.com/page/3 how i can do this. my controller already handle request for /index/3 but how i can handle request for /page/3

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• How to set two column unique in SQL.

  - by sxingfeng

  I am creating a table ,in the table two column is unique, I mean columnA and columnB do not have same value: such as : Table X A B 1 2(RIGHT,unique) 2 2(RIGHT, unique) 1 3(RIGHT, not unique) 2 3(RIGHT, not unique) 1 2 (WRONG, not unique) How to create such a table? many thanks!

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• Create and populate two-dimensional array in Scala

  - by ~asteinlein

  What's the recommended way of creating a pre-populated two-dimensional array in Scala? I've got the following code: val map = for { x <- (1 to size).toList } yield for { y <- (1 to size).toList } yield (x, y) How do I make an array instead of list? Replacing .toList with .toArray doesn't compile. And is there a more concise or readable way of doing this than the nested for expressions?

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• Why doesn't the difference between two dates give me a whole number of days

  - by ash34

  Hi, Can someone explain this to me. From jconsole ... from = new Date('01/01/2010') Fri Jan 01 2010 00:00:00 GMT-0800 (PST) thru = new Date('06/07/2010') Mon Jun 07 2010 00:00:00 GMT-0700 (PST) (thru - from) / (1000 * 24 * 60 * 60) 156.95833333333334 Why don't I get a whole number of days? How do I calculate the difference between two dates? thanks much.

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• compare two ip with C#

  - by gloris

  How I can compare two IP address? string ip1 = "123.123.123.123"; string ip2 = "124.124.124.124"; I need some like this: if(ip1 == ip2) { //true }

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• Print Alternating Characters From Two Strings (Interleaving) Using Recursion Java

  - by babi2balla

  I'm trying to write a method that uses recursion to print the string formed by "interleaving" the strings str1 and str2. In other words, it should alternate characters from the two strings: the first character from str1, followed by the first character from str2, followed by the second character from str1, followed by the second character from str2, etc. How would I go about this? Any ideas are greatly appreciated!! Thanks

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