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python numpy machine epsilon
...):
print(np.finfo(float).eps)
# 2.22044604925e-16
print(np.finfo(np.float32).eps)
# 1.19209e-07
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What does “atomic” mean in programming?
...riable is written using two separate operations: one that writes the first 32 bits, and a second one which writes the last 32 bits. That means that another thread might read the value of foo, and see the intermediate state.
Making the operation atomic consists in using synchronization mechanisms i...
What is the difference between NULL, '\0' and 0?
...used and means the value of the pointer is 0, independent of whether it is 32bit or 64bit (one case 4 bytes the other 8 bytes of zeroes).
string context - the character representing the digit zero has a hex value of 0x30, whereas the NUL character has hex value of 0x00 (used for terminating strings)...
What is a “callback” in C and how are they implemented?
...tring.h>
#include "../../common_typedef.h"
typedef void (*call_back) (S32, S32);
void test_call_back(S32 a, S32 b)
{
printf("In call back function, a:%d \t b:%d \n", a, b);
}
void call_callback_func(call_back back)
{
S32 a = 5;
S32 b = 7;
back(a, b);
}
S32 main(S32 argc, S8 *...
What does “#pragma comment” mean?
...|
edited Jun 21 '14 at 17:32
answered Aug 14 '10 at 18:14
K...
Is it possible to use global variables in Rust?
...ation is performed at runtime. Here are a few examples:
static SOME_INT: i32 = 5;
static SOME_STR: &'static str = "A static string";
static SOME_STRUCT: MyStruct = MyStruct {
number: 10,
string: "Some string",
};
static mut db: Option<sqlite::Connection> = None;
fn main() {
p...
How to update Python?
...nswers are for the same bit-versions, and by bit-version I mean 64-bit vs. 32-bit. For example, these answers would apply to updating from 64-bit Python-2.7.10 to 64-bit Python-2.7.11, ie: the same bit-version. While it is possible to install two different bit versions of Python together, it would r...
Loop through files in a directory using PowerShell
...st want to add... a different approach usable in PowerShell:
Install GNUWin32 utils and use grep to view the lines / redirect the output to file http://gnuwin32.sourceforge.net/
This overwrites the new file every time:
grep "step[49]" logIn.log > logOut.log
This appends the log output, in ca...
libcurl 32位动态dll库、静态lib库下载 - 源码下载 - 清泛网 - 专注C/C++及内核技术
libcurl 32位动态dll库、静态lib库下载libcurl 动态库 静态库源码编译好的libcurl库，包括动态库dll版本，和静态库lib版本。libcurl官方源码下载地址：https: curl haxx se download html采用cmake生成sln解决方案，vs编译。源码编译好的libcurl库，...
7-Zip for 32/64位 v16.02 - 软件下载 - 清泛网 - 专注C/C++及内核技术
7-Zip for 32/64位 v16.027-Zip 64位7-Zip是一款拥有极高压缩比的开源压缩软件。中文版附加内容请访问 GitHub 查看。许可协议7-Zip是一款开源软件。大多数源代码都基于GNU L...
7-Zip 是一款拥有极高压缩比的开源压缩软件。
中文版附加...