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How does a language expand itself? [closed]
...'t already possible.
But the libraries don't have to be written in C++ in order to be usable by a C++ program. Even if they are written in C++, they may internally use other libraries not written in C++. So the fact that C++ didn't provide any way to do it doesn't prevent it from being added, so lo...
Does Javascript pass by reference? [duplicate]
...y value:
function replace(ref) {
ref = {}; // this code does _not_ affect the object passed
}
function update(ref) {
ref.key = 'newvalue'; // this code _does_ affect the _contents_ of the object
}
var a = { key: 'value' };
replace(a); // a still has its original value - it's un...
Duplicating a MySQL table, indices, and data
...oldtable;
To copy just structure and data use this one:
CREATE TABLE tbl_new AS SELECT * FROM tbl_old;
I've asked this before:
Copy a MySQL table including indexes
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How can I record a Video in my Android App.?
...
Here is a simple video recording example using the MediaRecorder:
public class VideoCapture extends Activity implements OnClickListener, SurfaceHolder.Callback {
MediaRecorder recorder;
SurfaceHolder holder;
boolean recording = false;
@Override
public void onCrea...
python assert with and without parenthesis
...a convenient way to insert debugging assertions into a program:
assert_stmt ::= "assert" expression ["," expression]
The simple form, assert expression, is equivalent to
if __debug__:
if not expression: raise AssertionError
The extended form, assert expression1, expression2, is equi...
How do I convert a Vector of bytes (u8) to a string
...string slice (assuming a UTF-8 encoding):
use std::str;
//
// pub fn from_utf8(v: &[u8]) -> Result<&str, Utf8Error>
//
// Assuming buf: &[u8]
//
fn main() {
let buf = &[0x41u8, 0x41u8, 0x42u8];
let s = match str::from_utf8(buf) {
Ok(v) => v,
E...
String formatting in Python 3
...format(goals=2, penalties=4)
"({goals} goals, ${penalties})".format(**self.__dict__)
"first goal: {0.goal_list[0]}".format(self)
"second goal: {.goal_list[1]}".format(self)
"conversion rate: {:.2f}".format(self.goals / self.shots) # '0.20'
"conversion rate: {:.2%}".format(self.goals / self.shots) ...
Why does javascript replace only first instance when using replace? [duplicate]
...al meaning in regexen — the JavaScript idiom for that is:
var id= 'c_'+date.split('/').join('');
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How can I convert a series of images to a PDF from the command line on linux? [closed]
... what if page*.png does not sort the images in the way you want ? e.g. page_1.png, page_2.png ... page_10.png -> page_10 will appear before page_1
– vcarel
Jul 17 '13 at 0:29
38...
NtMapViewOfSection注入 - C/C++ - 清泛网 - 专注C/C++及内核技术
...要特殊的条件比如像管理员权限或者之类的要求
#define _WIN32_WINNT 0x0400
#include <windows.h>
typedef LONG NTSTATUS, *PNTSTATUS;
#define NT_SUCCESS(Status) ((NTSTATUS)(Status) >= 0)
typedef enum _SECTION_INHERIT
{
ViewShare = 1,
ViewUnmap = 2
} SECTION_INHERIT;
...