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  • Unexpected answer

    - by Sandeep
    #include<stdio.h> int main() { printf("He %c llo",65); } Output: A #include<stdio.h> int main() { printf("He %c llo",13); } Output: llo I can understand that 65 is ascii value for A and hence A is printed in first case but why llo in second case. Thanks

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  • Problem while adding a new value to a hashtable when it is enumerated

    - by karthik
    `hi I am doing a simple synchronous socket programming,in which i employed twothreads one for accepting the client and put the socket object into a collection,other thread will loop through the collection and send message to each client through the socket object. the problem is 1.i connect to clients to the server and start send messages 2.now i want to connect a new client,while doing this i cant update the collection and add a new client to my hashtable.it raises an exception "collection modified .Enumeration operation may not execute" how to add a NEW value without having problems in a hashtable. private void Listen() { try { //lblStatus.Text = "Server Started Listening"; while (true) { Socket ReceiveSock = ServerSock.Accept(); //keys.Clear(); ConnectedClients = new ListViewItem(); ConnectedClients.Text = ReceiveSock.RemoteEndPoint.ToString(); ConnectedClients.SubItems.Add("Connected"); ConnectedList.Items.Add(ConnectedClients); ClientTable.Add(ReceiveSock.RemoteEndPoint.ToString(), ReceiveSock); //foreach (System.Collections.DictionaryEntry de in ClientTable) //{ // keys.Add(de.Key.ToString()); //} //ClientTab.Add( //keys.Add( } //lblStatus.Text = "Client Connected Successfully."; } catch (Exception ex) { MessageBox.Show(ex.Message); } } private void btn_receive_Click(object sender, EventArgs e) { Thread receiveThread = new Thread(new ThreadStart(Receive)); receiveThread.IsBackground = true; receiveThread.Start(); } private void Receive() { while (true) { //lblMsg.Text = ""; byte[] Byt = new byte[2048]; //ReceiveSock.Receive(Byt); lblMsg.Text = Encoding.ASCII.GetString(Byt); } } private void btn_Send_Click(object sender, EventArgs e) { Thread SendThread = new Thread(new ThreadStart(SendMsg)); SendThread.IsBackground = true; SendThread.Start(); } private void btnlist_Click(object sender, EventArgs e) { //Thread ListThread = new Thread(new ThreadStart(Configure)); //ListThread.IsBackground = true; //ListThread.Start(); } private void SendMsg() { while (true) { try { foreach (object SockObj in ClientTable.Keys) { byte[] Tosend = new byte[2048]; Socket s = (Socket)ClientTable[SockObj]; Tosend = Encoding.ASCII.GetBytes("FirstValue&" + GenerateRandom.Next(6, 10).ToString()); s.Send(Tosend); //ReceiveSock.Send(Tosend); Thread.Sleep(300); } } catch (Exception ex) { MessageBox.Show(ex.Message); } } }

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  • Need to convert int value to hex value

    - by SA
    Hi, I need to convert char to hex values. Refer to the Ascii table but I have a few examples listed below: int 1 = 31 2 = 32 3 = 33 4 = 34 5 = 35 A = 41 a = 61 etc Therefore int test = 12345; Need to get the converted i = 3132333435

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  • Efective way to avoid integer overflow when multiplying?

    - by Jonathan
    Hi, I'm working on a hash function which gets a string as input. Right now I'm doing a loop and inside the hash (an int variable) is being multiplied by a value and then the ASCII code for the current character is added to the mix. hash = hash * seed + string[i] But sometimes, if the string is big enough there is an integer overflow there, what can I do to avoid it while maintaining the same hash structure? Maybe a bit operation included inside the loop?

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  • Easy way to convert a string of 0's and 1's into a character? Plain C

    - by Nick
    I'm doing a steganography project where I read in bytes from a ppm file and add the least significant bit to an array. So once 8 bytes are read in, I would have 8 bits in my array, which should equal some character in a hidden message. Is there an easy way to convert an array of 0's and 1's into an ascii value? For example, the array: char bits[] = "0,1,1,1,0,1,0,0" would equal 't'. Plain C

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  • Convert wchar_t to char

    - by Yan Cheng CHEOK
    I was wondering is it safe to do so? wchar_t wide = /* something */; assert(wide >= 0 && wide < 256 &&); char myChar = static_cast<char>(wide); If I am pretty sure the wide char will fall within ASCII range.

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  • Why is FLD1 loading NaN instead?

    - by Bernd Jendrissek
    I have a one-liner C function that is just return value * pow(1.+rate, -delay); - it discounts a future value to a present value. The interesting part of the disassembly is 0x080555b9 : neg %eax 0x080555bb : push %eax 0x080555bc : fildl (%esp) 0x080555bf : lea 0x4(%esp),%esp 0x080555c3 : fldl 0xfffffff0(%ebp) 0x080555c6 : fld1 0x080555c8 : faddp %st,%st(1) 0x080555ca : fxch %st(1) 0x080555cc : fstpl 0x8(%esp) 0x080555d0 : fstpl (%esp) 0x080555d3 : call 0x8051ce0 0x080555d8 : fmull 0xfffffff8(%ebp) While single-stepping through this function, gdb says (rate is 0.02, delay is 2; you can see them on the stack): (gdb) si 0x080555c6 30 return value * pow(1.+rate, -delay); (gdb) info float R7: Valid 0x4004a6c28f5c28f5c000 +41.68999999999999773 R6: Valid 0x4004e15c28f5c28f6000 +56.34000000000000341 R5: Valid 0x4004dceb851eb851e800 +55.22999999999999687 R4: Valid 0xc0008000000000000000 -2 =R3: Valid 0x3ff9a3d70a3d70a3d800 +0.02000000000000000042 R2: Valid 0x4004ff147ae147ae1800 +63.77000000000000313 R1: Valid 0x4004e17ae147ae147800 +56.36999999999999744 R0: Valid 0x4004efb851eb851eb800 +59.92999999999999972 Status Word: 0x1861 IE PE SF TOP: 3 Control Word: 0x037f IM DM ZM OM UM PM PC: Extended Precision (64-bits) RC: Round to nearest Tag Word: 0x0000 Instruction Pointer: 0x73:0x080555c3 Operand Pointer: 0x7b:0xbff41d78 Opcode: 0xdd45 And after the fld1: (gdb) si 0x080555c8 30 return value * pow(1.+rate, -delay); (gdb) info float R7: Valid 0x4004a6c28f5c28f5c000 +41.68999999999999773 R6: Valid 0x4004e15c28f5c28f6000 +56.34000000000000341 R5: Valid 0x4004dceb851eb851e800 +55.22999999999999687 R4: Valid 0xc0008000000000000000 -2 R3: Valid 0x3ff9a3d70a3d70a3d800 +0.02000000000000000042 =R2: Special 0xffffc000000000000000 Real Indefinite (QNaN) R1: Valid 0x4004e17ae147ae147800 +56.36999999999999744 R0: Valid 0x4004efb851eb851eb800 +59.92999999999999972 Status Word: 0x1261 IE PE SF C1 TOP: 2 Control Word: 0x037f IM DM ZM OM UM PM PC: Extended Precision (64-bits) RC: Round to nearest Tag Word: 0x0020 Instruction Pointer: 0x73:0x080555c6 Operand Pointer: 0x7b:0xbff41d78 Opcode: 0xd9e8 After this, everything goes to hell. Things get grossly over or undervalued, so even if there were no other bugs in my freeciv AI attempt, it would choose all the wrong strategies. Like sending the whole army to the arctic. (Sigh, if only I were getting that far.) I must be missing something obvious, or getting blinded by something, because I can't believe that fld1 should ever possibly fail. Even less that it should fail only after a handful of passes through this function. On earlier passes the FPU correctly loads 1 into ST(0). The bytes at 0x080555c6 definitely encode fld1 - checked with x/... on the running process. What gives?

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  • Problem using a method in Ruby

    - by Rafal
    I'm very new to Ruby (and OOP as well) and I don't know why the following thing doesn't work in Ruby I extended the String class with a new method. Easy enough. Now I want to extend the Fixnum class. A String object appears somewhere in the class, but I can't use the method that I defined earlier. Why? Is this normal?

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  • OnTouch event consumes click event and prevents execution in parent

    - by Taig
    I'm having a FrameLayout that has an extended ImageView (github) as a child. When I set an onClick()-Event to the FrameLayout it won't be triggered. The reason appears to be the onTouch() method's return value. If I set the ACTION_DOWN's return value to false the event is passed along properly - but then the Multitouch functionalities break. Also running performClick() in the ACTION_UP event comes to nothing. How to handle those events correctly?

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  • How to generate real UTF-8 XML with grails without the escape characters?

    - by AngeDeLaMort
    I have been wondering why when I set the encoding to UTF-8 and rendering the XML it replace the extended characters by escape characters (or character reference) like &#x2019; instead of '? I'm using the Render method render(contentType:"text/xml", encoding:"UTF-8") {...} with a proper header render(contentType:"text/xml", encoding:"UTF-8", text:"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n") Any idea if there is a way to write it properly? Thanks.

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  • calling c function from assembly

    - by void
    I'm trying to use a function in assembly in a C project, the function is supposed to call a libc function let's say printf() but I keep getting a segmentation fault. In the .c file I have the declaration of the function let's say int do_shit_in_asm() In the .asm file I have .extern printf .section .data printtext: .ascii "test" .section .text .global do_shit_in_asm .type do_shit_in_asm, @function do_shit_in_asm: pushl %ebp movl %esp, %ebp push printtext call printf movl %ebp, %esp pop %ebp ret Any pointers would be appreciated. as func.asm -o func.o gcc prog.c func.o -o prog

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  • How to run test suit with Spring TestContext ?

    - by lisak
    Hey, I can't figure out, how to set up following scenario with Sprint TestContext with either JUnit4 or testNG: @BeforeTestSuit - oneTimeSetUp @BeforeClass @Before - setUp @Test - testEmptyCollection @After - tearDown @Before - setUp @Test - testEmptyCollection @After - tearDown @AfterClass @BeforeClass @Before - setUp @Test - testOneItemCollection @After - tearDown @Before - setUp @Test - testEmptyCollection @After - tearDown @AfterClass @AfterTestSuit - oneTimeTearDown Could please anybody help me out here ? My architecture is a parent class with @RunWith(SpringJUnit4ClassRunner.class) that is extended with particular test classes.

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  • Android Soft Keyboard value using array

    - by Shubh
    Hi friends, Yet I use Soft Keyboard sample from http://developer.android.com/resources/samples/SoftKeyboard/index.html Here we uses ASCII value from XML ,now at the place of XML I want to generate these value using array. How can I do this Thanks in Advance

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  • adding a property to an EventArgs

    - by aleroot
    I have extended the standard FileSystemWatcher class by adding a string property (fileToTest), now i need to extend also the FileSystemEventArgs to add this property how can i do this ? my extend FileSystemWatcher : class AleFileSystemWatcher : FileSystemWatcher { public string fileToTest { get; set; } } The FileSystemEventArgs fileToTest property should be the same of AleFileSystemWatcher fileToTest . Can i do this ?

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  • What's making my page extend slightly beyond the viewport? [CSS]

    - by Jack W-H
    Basically I'm a tad confused. You'll see at http://furnace.howcode.com , in the second column, the bottom scrollbar button is extended slightly beyond the end of the viewport. I'm pretty confused as I've been examining the CSS and can't find anything that's causing this. Can you have a look? It's probably something simple that I've just missed! :) Screenshot:

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  • dynamically decorating objects in c#

    - by Oren Mazor
    is it possible to easily and dynamically decorate an object? for example, lets say I have a List<PointF>. this list is actually a plot of the sine function. I'd like to go through these points and add a flag to each PointF of whether it's a peak or not. but I don't want to create a new extended SpecialPointF or whatever, that has a boolean property. judge me all you want for being lazy, but laziness is how awesome ideas are born (also bad ideas)

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  • Help with \0 terminated strings in C#

    - by Joshua
    I'm using a low level native API where I send an unsafe byte buffer pointer to get a c-string value. So it gives me // using byte[255] c_str string s = new string(Encoding.ASCII.GetChars(c_str)); // now s == "heresastring\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0(etc)"; So obviously I'm not doing it right, how I get rid of the excess?

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  • What's the best practice or design pattern for user registration ?

    - by Space Cracker
    We have a big portal that needs user registration to allow them use its services. It's already done in .NET and SOL Server 2005. we are in the phase now of discovering all the problems of the current registration system to build a new robust flexible one that can be extended easily and can be more usable for all services. Could any help me find best practices and design patterns to help me rebuild this using good architectural practices?

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