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C语言结构体里的成员数组和指针 - C/C++ - 清泛网 - 专注C/C++及内核技术
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#include <stdio.h>
struct str{
int len;
char s[0];
};
struct foo {
struct str *a;
};
int main(int argc, char** argv) {
struct foo f={0}...
What is the >>>= operator in C?
...
The line:
while( a[ 0xFULL?'\0':-1:>>>=a<:!!0X.1P1 ] )
contains the digraphs :> and <:, which translate to ] and [ respectively, so it's equivalent to:
while( a[ 0xFULL?'\0':-1 ] >>= a[ !!0X.1P1 ] )
The literal 0xFUL...
一分钟明白 VS manifest 原理 - C/C++ - 清泛网 - 专注C/C++及内核技术
...本，相反。
为什么我的manifest明明指明
name="Microsoft.VC80.DebugCRT" version="8.0.50608.0"，
但是用depends.exe工具却发现引用的是8.00.50727.42呢？
因为在C:/WINDOWS/WinSxS/Policies下，有publisher configuration file也叫policy文件,如8.0.50727.42.policy文件...
C++/COM VARIANT实现二维数组 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ND sab[2]; /*用于定义数组的维数和下标的起始值*/
sab[0].cElements = 2;
sab[0].lLbound = 0;
sab[1].cElements = 2;
sab[1].lLbound = 0;
/*创建一个2*2的类型为long的二维数组*/
SAFEARRAY* psa = SafeArrayCreate(vt, sizeof(sab)/sizeof(SAF...
Java String - See if a string contains only numbers and not letters
...Z]+") == false && text.length() > 2){
to:
if (text.matches("[0-9]+") && text.length() > 2) {
Instead of checking that the string doesn't contain alphabetic characters, check to be sure it contains only numerics.
If you actually want to use the numeric value, use Integer.p...
How to generate keyboard events in Python?
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+50
It can be done using ctypes:
import ctypes
from ctypes import wintypes
import time
user32 = ctypes.WinDLL('user32', use_last_error=T...
How can I map True/False to 1/0 in a Pandas DataFrame?
... that has boolean True/False values, but for further calculations I need 1/0 representation. Is there a quick pandas/numpy way to do that?
...
Why is address zero used for the null pointer?
...s a pointer with the value zero if it can't get me memory; I use if (p != 0) all the time to make sure passed pointers are valid, etc.
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Cocoa: What's the difference between the frame and the bounds?
...
908
The bounds of an UIView is the rectangle, expressed as a location (x,y) and size (width,height)...
How to get first character of string?
...
1080
What you want is charAt.
var x = 'some string';
alert(x.charAt(0)); // alerts 's'
...