bit

Keeping page changes history. A bit like SO does for revisions

匿名 (未验证) 提交于 2019-12-03 01:48:02
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I have a CMS system that stores data across tables like this: Entries Table +----+-------+------+--------+--------+ | id | title | text | index1 | index2 | +----+-------+------+--------+--------+ Entries META Table +----+----------+-------+-------+ | id | entry_id | value | param | +----+----------+-------+-------+ Files Table +----+----------+----------+ | id | entry_id | filename | +----+----------+----------+ Entries-to-Tags Table +----+----------+--------+ | id | entry_id | tag_id | +----+----------+--------+ Tags Table +----+-----+ | id

Weird behavior of right shift operator (1 >> 32)

匿名 (未验证) 提交于 2019-12-03 01:47:02
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I recently faced a strange behavior using the right-shift operator. The following program: #include #include #include #include int foo(int a, int b) { return a >> b; } int bar(uint64_t a, int b) { return a >> b; } int main(int argc, char** argv) { std::cout > 32: " > 32) > (int)32: " > (int)32) Outputs: foo(1, 32): 1 // Should be 0 (but I guess I'm missing something) bar(1, 32): 0 1 >> 32: 0 (int)1 >> (int)32: 0 What happens with the foo() function ? I understand that the only difference between what it does and the last 2 lines, is that the

get absolute value without using abs function nor if statement

匿名 (未验证) 提交于 2019-12-03 01:47:02
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I was thinking how to get the absolute value of an integer without using if statement nor abs() . At first I was using shift bits left ( ), trying to get negative sign out of the range, then shift bits right back to where it be, but unfortunately it doesn't work for me. Please let me know why it isn't working and other alternatives ways to do it. 回答1: From Bit Twiddling Hacks : int v; // we want to find the absolute value of v unsigned int r; // the result goes here int const mask = v >> sizeof(int) * CHAR_BIT - 1; r = (v + mask) ^ mask; 回答2

I cannot install numpy because it can't find python 2.7, althought I have installed python

匿名 (未验证) 提交于 2019-12-03 01:47:02
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I cannot install numpy because it can't find python 2.7, althought I have installed python. I have message: "Python version 2.7 required, which can't find in registry" Do have a solve of my problem? 回答1: You should install Python 32bit, or use the numpy package for python 64bit from this unofficial site 回答2: This is not uncommon with installers (e.g. Numpy) that depend on or look for a previously installed 64 bit core application (e.g. Python x64). The problem and solution are easy to explain. PROBLEM IMHO this is an error on the

Could not load file or assembly exception

匿名 (未验证) 提交于 2019-12-03 01:45:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: Any thoughts on what might be causing this exception? I have a webservice proj, when i load the link i get Could not load file or assembly 'Interop.DIB' or one of its dependencies. An attempt was made to load a program with an incorrect format. Exception Details: System.BadImageFormatException: Could not load file or assembly 'Interop.DIB' or one of its dependencies. An attempt was made to load a program with an incorrect format. Inner exceptions: [BadImageFormatException: Could not load file or assembly 'Interop.DIB' or one of its

in-place bit-reversed shuffle on an array

匿名 (未验证) 提交于 2019-12-03 01:45:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: For a FFT function I need to permutate or shuffle the elements within an array in a bit-reversed way. That's a common task with FFTs because most power of two sized FFT functions either expect or return their data in a bit-reversed way. E.g. assume that the array has 256 elements I'd like to swap each element with it's bit-reversed pattern. Here are two examples (in binary): Element 00000001b should be swapped with element 10000000b Element 00010111b should be swapped with element 11101000b and so on. Any idea how to do this fast and more

Retrieving all 32 bit process modules from 64 bit application (C#)

匿名 (未验证) 提交于 2019-12-03 01:45:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I have a 64 bit program that retrieving process modules from other processes but when i try to get modules form 32 bit processes i get only: Application executable. - various ntdll.dll - always wow64.dll - always wow64cpu.dll - always wow64win.dll - always but process have many other modules. Can i get all 32 bit process modules from 64 bit application(C#)? Thanks! 回答1: Yes, but you'll need p/invoke. EnumProcessModulesEx It's possible that the DbgHelp API could be coaxed to do this, but I've been told that despite having appropriately-sized

Cannot load 32-bit SWT libraries on 64-bit JVM

匿名 (未验证) 提交于 2019-12-03 01:44:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: My computer is win7 64 bit, and jdk is 1.7.0.21,jvm is 1.6.. and 64 bit I want to run SWT application and export as runnable jar file . When I run the application, it has the exception that Cannot load 32-bit SWT libraries on 64-bit JVM, so I import the SDK as alternate jre just like you point at Cannot load 64-bit SWT libraries on 32-bit JVM ( replacing SWT file ) , and in Eclipse, the application can run correctly, but when I edit the bat file to run the jar file, it always has the problem like Cannot load 32-bit SWT libraries on 64-bit

Convert RGB image to RGB 16-bit and 8-bit

匿名 (未验证) 提交于 2019-12-03 01:44:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I'm a newbie programmer. Is there any algorithm to convert an image to 16-bit or 8-bit? I didn't find it on google, I'am desperate. 回答1: Changing to 16 bit is the easier one. Assuming that the original image is in image , you can simply draw it into the result. Bitmap result = new Bitmap(image.Width, image.Height, PixelFormat.Format16bppRgb565); using (Graphics g = Graphics.FromImage(result)) { g.DrawImage(image, 0, 0, image.Width, image.Height); } Unfortunately, this does not work for indexed images (images with palette, up to 256 colors).

need concept to understand declaration of array in system verilog

匿名 (未验证) 提交于 2019-12-03 01:42:02
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I am always confusing while declaring an array and Array Querying Function in SystemVerilog. Can you explain me in details for given example: Example-1 integer matrix [ 7 : 0 ][ 0 : 31 ][ 15 : 0 ]; // 3-dimensional unpacked array of integers i am confuse in size // and dimension of given array for 1 and 2 dimension its easy to // understand but for 3 and 4-dimension its little bit confusing... Example-2 //bit [1:5][10:16] foo [21:27][31:38]; Example-3 //module array(); bit [ 1 : 5 ][ 10 : 16 ] foo1 [ 21 : 27 ][ 31 : 38 ], foo2 [ 31