Search Results

Search found 19913 results on 797 pages for 'bit packing'.

facebook twitter digg google delicious technorati stumbleupon myspace wordpress linkedin gmail igoogle windows live tumblr viadeo yahoo buzz yahoo mail yahoo bookmarks favorites email print

Page 65/797 | < Previous Page | 61 62 63 64 65 66 67 68 69 70 71 72  | Next Page >

  • MVC and Checkboxes...leaves a bit to be desired

    - by Josh
    Here is my problem. I have a list of models that are displayed to the user. On the left is a checkbox for each model to indicate that the user wants to choose this model (in this case, we're building products a user can add to their shopping cart). The model has no concept of being chosen...it strictly has information about the product in question. I've talked with a few other developers after having gone through and the best I could come up with is getting the formcollection and string parsing the key values to determine whether the checkbox is checked or not. This doesn't seem ideal. I was thinking there would be something more strongly bound, but I can't figure out a way to do it. I tried creating another model that had a boolean property to represent being checked and a property of the model and passing a list of that model type to the view and creating a ActionResult on the controller that accepts a list of the new model / checked property, but it comes back null. Am I just thinking too much like web forms and should just continue on with parsing checkbox values?

    Read the article

  • Flash Player error logs on Mac OS X

    - by paleozogt
    I'm on Mac OS X 10.5.8 running Flash Player 10,0,32,18. Flash Player is dumping giant amounts of error logging into the system log (stuff like "bit length overflow" and "code 0 bits 6-7"). Here's a tiny sampling: Oct 14 13:09:41 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: bit length overflow Oct 14 13:09:41 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 6 bits 6->7 Oct 14 13:09:41 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: bit length overflow Oct 14 13:09:41 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 5 bits 6->7 Oct 14 13:09:55 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: bit length overflow Oct 14 13:09:55 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 6 bits 6->7 Oct 14 13:09:55 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: bit length overflow Oct 14 13:09:55 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 5 bits 6->7 Oct 14 13:09:55 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: bit length overflow Oct 14 13:09:55 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 0 bits 6->7 Oct 14 13:10:06 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: bit length overflow Oct 14 13:10:06 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 4 bits 6->7 Oct 14 13:10:06 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: bit length overflow Oct 14 13:10:06 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 12 bits 6->7 Oct 14 13:10:20 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: bit length overflow Oct 14 13:10:20 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 6 bits 6->7 Oct 14 13:10:20 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: bit length overflow Oct 14 13:10:20 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 5 bits 6->7 Oct 14 13:10:21 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: bit length overflow Oct 14 13:10:21 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 0 bits 6->7 Oct 14 13:10:21 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: bit length overflow Oct 14 13:10:21 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 12 bits 6->7 Oct 14 13:10:31 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: bit length overflow Oct 14 13:10:31 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 7 bits 6->7 Oct 14 13:10:31 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: bit length overflow Oct 14 13:10:31 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 12 bits 6->7 Oct 14 13:11:06 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: bit length overflow Oct 14 13:11:06 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 3 bits 6->7 Oct 14 13:11:06 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: bit length overflow Oct 14 13:11:06 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 4 bits 6->7 Oct 14 13:11:06 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: bit length overflow Oct 14 13:11:06 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 3 bits 7->6 Oct 14 13:11:06 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 4 bits 5->6 Oct 14 13:11:07 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: bit length overflow Oct 14 13:11:07 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 3 bits 6->7 Oct 14 13:11:07 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: bit length overflow Oct 14 13:11:07 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 3 bits 6->7 Oct 14 13:11:15 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: bit length overflow Oct 14 13:11:15 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 3 bits 6->7 Oct 14 13:11:26 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: bit length overflow Oct 14 13:11:26 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 7 bits 6->7 Oct 14 13:11:26 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 0 bits 4->5 Oct 14 13:11:26 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 14 bits 4->5 Oct 14 13:11:26 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 10 bits 5->4 Oct 14 13:11:26 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: code 4 bits 5->4 Oct 14 13:11:26 thorst-2 [0x0-0x58058].com.adobe.flash-10.0[2416]: bit length overflow Any ideas on what this may be about?

    Read the article

  • How do I read 64-bit Registry values from VBScript running as a an msi post-installation task?

    - by Joergen Bech
    I need to read the location of the Temporary ASP.NET Files folder from VBScript as part of a post-installation task in an installer created using a Visual Studio 2008 deployment project. I thought I would do something like this: Set oShell = CreateObject("Wscript.Shell") strPath = oShell.RegRead("HKLM\SOFTWARE\Microsoft\ASP.NET\2.0.50727.0\Path") and then concatenate strPath with "\Temporary ASP.NET Files" and be done with it. On an x64 system, however, I am getting the value from the WOW6432Node (HKLM\SOFTWARE\Wow6432Node\Microsoft\ASP.NET\2.0.50727.0), which gives me the 32-bit framework path (C:\Windows\Microsoft.NET\Framework\v2.0.50727), but on an x64 system, I actually want the 64-bit path, i.e. C:\Windows\Microsoft.NET\Framework64\v2.0.50727. I understand that this happens because the .vbs file is run using the 32-bit script host due to the parent process (the installer) being 32-bit itself. How can I run the script using the 64-bit script host - or - how can I read the 64-bit values even if the script is run using the 32-bit script host?

    Read the article

  • Ever any performance different between Java >> and >>> right shift operators?

    - by Sean Owen
    Is there ever reason to think the (signed) and (unsigned) right bit-shift operators in Java would perform differently? I can't detect any difference on my machine. This is purely an academic question; it's never going to be the bottleneck I'm sure. I know: it's best to write what you mean foremost; use for division by 2, for example. I assume it comes down to which architectures have which operations implemented as an instruction.

    Read the article

  • Java bitshift strangeness

    - by Martin
    Java has 2 bitshift operators for right shifts: >> shifts right, and is dependant on the sign bit for the sign of the result >>> shifts right and shifts a zero into leftmost bits http://java.sun.com/docs/books/tutorial/java/nutsandbolts/op3.html This seems fairly simple, so can anyone explain to me why this code, when given a value of -128 for bar, produces a value of -2 for foo: byte foo = (byte)((bar & ((byte)-64)) >>> 6); What this is meant to do is take an 8bit byte, mask of the leftmost 2 bits, and shift them into the rightmost 2 bits. Ie: initial = 0b10000000 (-128) -64 = 0b11000000 initial & -64 = 0b10000000 0b10000000 >>> 6 = 0b00000010 The result actually is -2, which is 0b11111110 Ie. 1s rather than zeros are shifted into left positions

    Read the article

  • C# int to byte[]

    - by Petoj
    If I need to convert an int to byte[] I could use Bitconvert.GetBytes(). But if I should follow this: An XDR signed integer is a 32-bit datum that encodes an integer in the range [-2147483648,2147483647]. The integer is represented in two's complement notation. The most and least significant bytes are 0 and 3, respectively. Integers are declared as follows: Taken from RFC1014 3.2. What method should I use then if there is no method to do this? How would it look like if you write your own? I don't understand the text 100% so I can't implement it on my own.

    Read the article

  • Alternative to BitConverter.ToInt32

    - by MusiGenesis
    I'm using BitConverter.ToInt32 to pack 3 byte values into an int, like so: byte R = 0; byte G = 0; byte B = 0; int i = BitConverter.ToInt32(new byte[] { R, G, B, 0 }, 0); Is there a faster way to do this that doesn't involve the creation of a new int each time? Getting the bytes out of an int is easy: int i = 34234; byte B = (byte)(i >> 0); byte G = (byte)(i >> 8); byte R = (byte)(i >> 16); Is there a simple way to reverse this process and use bit-shifting to write the RGB bytes back over an existing int?

    Read the article

  • How do I create an 8-bit PNG with transparency from an NSBitmapImageRep?

    - by Rob Keniger
    I have a 32-bit NSBitmapImageRep which has an alpha channel with essentially 1-bit values (the pixels are either on or off). I want to save this bitmap to an 8-bit PNG file with transparency. If I use the -representationUsingType:properties: method of NSBitmapImageRep and pass in NSPNGFileType, a 32-bit PNG is created, which is not what I want. I know that 8-bit PNGs can be read, they open in Preview with no problems, but is it possible to write this type of PNG file using any built-in Mac OS X APIs? I'm happy to drop down to Core Image or even QuickTime if necessary. A cursory examination of the CGImage docs didn't reveal anything obvious. EDIT: I've started a bounty on this question, if someone can provide working source code that takes a 32-bit NSBitmapImageRep and writes a 256-color PNG with 1-bit transparency, it's yours.

    Read the article

  • DataType for storing a long serial number (10 bytes)

    - by CrimsonX
    We have a device which has a 10 byte serial number which must be read into our application and stored into a .net datatype. In the device it is stored as an unsigned 10-byte (80-bit) number. I don't expect we will be performing any mathematical operations on this number, but only displaying it to the user. The .NET framework doesn't have a built in UNIT128 to store this datatype. My suggestion for storing this datatype is to create a 10 element byte array and read in the data into this array. Are there any better solutions to this problem? Note: I have seen in this question that a GUID is a 128 byte signed integer, but it seems like a bad idea to use a GUID in this fashion. Any other suggestions?

    Read the article

  • Extracting rightmost N bits of an integer

    - by srandpersonia
    In the yester Code Jam Qualification round http://code.google.com/codejam/contest/dashboard?c=433101#s=a&a=0 , there was a problem called Snapper Chain. From the contest analysis I came to know the problem requires bit twiddling stuff like extracting the rightmost N bits of an integer and checking if they all are 1. I saw a contestant's(Eireksten) code which performed the said operation like below: (((K&(1<<N)-1))==(1<<N)-1) I couldn't understand how this works. What is the use of -1 there in the comparison?. If somebody can explain this, it would be very much useful for us rookies. Also, Any tips on identifying this sort of problems would be much appreciated. I used a naive algorithm to solve this problem and ended up solving only the smaller data set.(It took heck of a time to compile the larger data set which is required to be submitted within 8 minutes.). Thanks in advance.

    Read the article

  • Representing a very large array of bits in little memory

    - by user614624
    Hello, I would like to represent a structure containing 250 M states(1 bit each) somehow into as less memory as possible (100 k maximum). The operations on it are set/get. I cold not say that it's dense or sparse, it may vary. The language I want to use is C. I looked at other threads here to find something suitable also. A probabilistic structure like Bloom filter for example would not fit because of the possible false answers. Any suggestions please?

    Read the article

  • how to downgrage gcc to version 4.1.1 if I use 64-bit Ubuntu 11.10 or 12.04?

    - by SSolid
    how to downgrade gcc to version 4.1.1 if i am using 64-bit ubuntu 11.10 or 12.04? please notice that I'm using 64-bit version of ubuntu It may seems simlar to this question Old version of gcc for new Ubuntu but I can't solve it with the method provide in that thread I get some error like gcc-4.1 : Depends: cpp-4.1 (= 4.1.2-27ubuntu1) but it is not going to be installed can someone tell me how to do it? thanks

    Read the article

  • Pointer Implementation Details in C

    - by Will Bickford
    I would like to know architectures which violate the assumptions I've listed below. Also I would like to know if any of the assumptions are false for all architectures (i.e. if any of them are just completely wrong). sizeof(int *) == sizeof(char *) == sizeof(void *) == sizeof(func_ptr *) The in-memory representation of all pointers for a given architecture is the same regardless of the data type pointed to. The in-memory representation of a pointer is the same as an integer of the same bit length as the architecture. Multiplication and division of pointer data types are only forbidden by the compiler. NOTE: Yes I know this is nonsensical. What I mean is - is there hardware support to forbid this incorrect usage? All pointer values can be casted to a single integer. In other words, what architectures still make use of segments and offsets? Incrementing a pointer is equivalent to adding sizeof(the pointed data type) to the memory address stored by the pointer. If p is an int32* then p+1 is equal to the memory address 4 bytes after p. I'm most used to pointers being used in a contiguous, virtual memory space. For that usage, I can generally get by thinking of them as addresses on a number line. See (http://stackoverflow.com/questions/1350471/pointer-comparison/1350488#1350488).

    Read the article

  • Why does the output look like this?

    - by cjk
    I have a c program below, I would like to send out a 32 bit message in a particular order Eg.0x00000001. #include <unistd.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/types.h> #include <stdint.h> struct test { uint16_t a; uint16_t b; }; int main(int argc, char const *argv[]) { char buf[4]; struct test* ptr=(struct test*)buf; ptr->a=0x0000; ptr->b=0x0001; printf("%x %x\n",buf[0],buf[1]); //output is 0 0 printf("%x %x\n",buf[2],buf[3]); //output is 1 0 return 0; } Then I test it by print out the values in char array. I got output in the above comments. Shouldn't the output be 0 0 and 0 1? since but[3] is the last byte? Is there anything I missed? Thanks!

    Read the article

  • Why are 32-bit application pools more efficient in IIS? [closed]

    - by mhenry1384
    I've been running load tests with two different ASP.NET web applications in IIS. The tests are run with 5,10,25, and 250 user agents. Tested on a box with 8 GB RAM, Windows 7 Ultimate x64. The same box running both IIS and the load test project. I did many runs, and the data is very consistent. For every load, I see a lower "Avg. Page Time (sec)" and a lower "Avg. Response Time (sec)" if I have "Enable 32-bit Applications" set to True in the Application Pools. The difference gets more pronounced the higher the load. At very high loads, the web applications start to throw errors (503) if the application pools are 64-bit, but they can can keep up if set to 32-bit. Why are 32-bit app pools so much more efficient? Why isn't the default for application pools 32-bit?

    Read the article

  • How do you return a string from a function correctly in Dynamic C?

    - by aquanar
    I have a program I am trying to debug, but Dynamic C apparently treats strings differently than normal C does (well, character arrays, anyway). I have a function that I made to make an 8 character long (well, 10 to include the \0 ) string of 0s and 1s to show me the contents of an 8-bit char variable. (IE, I give it the number 13, it returns the string "0001101\0" ) When I use the code below, it prints out !{happy face] 6 times (well, the second one is the happy face alone for some reason), each return comes back as 0xDEAE or "!\x02. I thought it would dereference it and return the appropriate string, but it appears to just be sending the pointer and attempting to parse it. This may seem silly, but my experience was actually in C++ and Java, so going back to C brings up a few issues that were dealt with in later programming languages that I'm not entirely sure how to deal with (like the lack of string variables). How could I fix this code, or how would be a better way to do what I am trying to do (I thought maybe sending in a pointer to a character array and working on it from the function might work, but I thought I should ask to see if maybe I'm just trying to reinvent the wheel). Currently I have it set up like this: this is an excerpt from the main() display[0] = '\0'; for(i=0;i<6;i++) { sprintf(s, "%s ", *char_to_bits(buffer[i])); strcat(display, s); } DispStr(8,5, display); and this is the offending function: char *char_to_bits(char x) { char bits[16]; strcpy(bits,"00000000\0"); if (x & 0x01) bits[7]='1'; if (x & 0x02) bits[6]='1'; if (x & 0x04) bits[5]='1'; if (x & 0x08) bits[4]='1'; if (x & 0x10) bits[3]='1'; if (x & 0x20) bits[2]='1'; if (x & 0x40) bits[1]='1'; if (x & 0x80) bits[0]='1'; return bits; } and just for the sake of completion, the other function is used to output to the stdio window at a specific location: void DispStr(int x, int y, char *s) { x += 0x20; y += 0x20; printf ("\x1B=%c%c%s", x, y, s); }

    Read the article

  • How can I get the palette of an 8-bit surface in SDL.NET/Tao.SDL?

    - by lolmaster
    I'm looking to get the palette of an 8-bit surface in SDL.NET if possible, or (more than likely) using Tao.SDL. This is because I want to do palette swapping with the palette directly, instead of blitting surfaces together to replace colours like how you would do it with a 32-bit surface. I've gotten the SDL_Surface and the SDL_PixelFormat, however when I go to get the palette in the same way, I get a System.ExecutionEngineException: private Tao.Sdl.Sdl.SDL_Palette GetPalette(Surface surf) { // Get surface. Tao.Sdl.Sdl.SDL_Surface sdlSurface = (Tao.Sdl.Sdl.SDL_Surface)System.Runtime.InteropServices.Marshal.PtrToStructure(surf.Handle, typeof(Tao.Sdl.Sdl.SDL_Surface)); // Get pixel format. Tao.Sdl.Sdl.SDL_PixelFormat pixelFormat = (Tao.Sdl.Sdl.SDL_PixelFormat)System.Runtime.InteropServices.Marshal.PtrToStructure(sdlSurface.format, typeof(Tao.Sdl.Sdl.SDL_PixelFormat)); // Execution exception here. Tao.Sdl.Sdl.SDL_Palette palette = (Tao.Sdl.Sdl.SDL_Palette)System.Runtime.InteropServices.Marshal.PtrToStructure(pixelFormat.palette, typeof(Tao.Sdl.Sdl.SDL_Palette)); return palette; } When I used unsafe code to get the palette, I got a compile time error: "Cannot take the address of, get the size of, or declare a pointer to a managed type ('Tao.Sdl.Sdl.SDL_Palette')". My unsafe code to get the palette was this: unsafe { Tao.Sdl.Sdl.SDL_Palette* pal = (Tao.Sdl.Sdl.SDL_Palette*)pixelFormat.palette; } From what I've read, a managed type in this case is when a structure has some sort of reference inside it as a field. The SDL_Palette structure happens to have an array of SDL_Color's, so I'm assuming that's the reference type that is causing issues. However I'm still not sure how to work around that to get the underlying palette. So if anyone knows how to get the palette from an 8-bit surface, whether it's through safe or unsafe code, the help would be greatly appreciated.

    Read the article

  • is it even possible to modify .apk, by adding additional class to .dex and re-packing with modified

    - by user355859
    is it even possible to modify .apk, by adding additional class to .dex and re-packing with modified manifest.xml?? I know there are tools such as baksmali / smali to disassemble / re-assemble given classes.dex from .apk, but not sure limitation what could be modified from there on? I'm trying to add additional activity, to modify starting launcher activity (may be from androidmanifest.xml) from original apk, then re-pack and sign to make complete single .apk... all need to be done out of build time, no raw source or build structure visible, only .apk as input... ANY IDEA?

    Read the article

  • Saturated addition of two signed Java 'long' values

    - by finnw
    How can one add two long values (call them x and y) in Java so that if the result overflows then it is clamped to the range Long.MIN_VALUE..Long.MAX_VALUE? For adding ints one can perform the arithmetic in long precision and cast the result back to an int, e.g.: int saturatedAdd(int x, int y) { long sum = (long) x + (long) y; long clampedSum = Math.max((long) Integer.MIN_VALUE, Math.min(sum, (long) Integer.MAX_VALUE)); return (int) clampedSum; } or import com.google.common.primitives.Ints; int saturatedAdd(int x, int y) { long sum = (long) x + (long) y; return Ints.saturatedCast(sum); } but in the case of long there is no larger primitive type that can hold the intermediate (unclamped) sum. Since this is Java, I cannot use inline assembly (in particular SSE's saturated add instructions.) It can be implemented using BigInteger, e.g. static final BigInteger bigMin = BigInteger.valueOf(Long.MIN_VALUE); static final BigInteger bigMax = BigInteger.valueOf(Long.MAX_VALUE); long saturatedAdd(long x, long y) { BigInteger sum = BigInteger.valueOf(x).add(BigInteger.valueOf(y)); return bigMin.max(sum).min(bigMax).longValue(); } however performance is important so this method is not ideal (though useful for testing.) I don't know whether avoiding branching can significantly affect performance in Java. I assume it can, but I would like to benchmark methods both with and without branching. Related: http://stackoverflow.com/questions/121240/saturating-addition-in-c

    Read the article

  • Shift count negative or too big error - correct solution?

    - by PeterK
    I have the following function for reading a big-endian quadword (in a abstract base file I/O class): unsigned long long CGenFile::readBEq(){ unsigned long long qT = 0; qT |= readb() << 56; qT |= readb() << 48; qT |= readb() << 40; qT |= readb() << 32; qT |= readb() << 24; qT |= readb() << 16; qT |= readb() << 8; qT |= readb() << 0; return qT; } The readb() functions reads a BYTE. Here are the typedefs used: typedef unsigned char BYTE; typedef unsigned short WORD; typedef unsigned long DWORD; The thing is that i get 4 compiler warnings on the first four lines with the shift operation: warning C4293: '<<' : shift count negative or too big, undefined behavior I understand why this warning occurs, but i can't seem to figure out how to get rid of it correctly. I could do something like: qT |= (unsigned long long)readb() << 56; This removes the warning, but isn't there any other problem, will the BYTE be correctly extended all the time? Maybe i'm just thinking about it too much and the solution is that simple. Can you guys help me out here? Thanks.

    Read the article

facebook twitter digg google delicious technorati stumbleupon myspace wordpress linkedin gmail igoogle windows live tumblr viadeo yahoo buzz yahoo mail yahoo bookmarks favorites email print

< Previous Page | 61 62 63 64 65 66 67 68 69 70 71 72  | Next Page >