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MFC学习总结 (90个技巧) dlg 上建立View - C/C++ - 清泛网 - 专注C++内核技术
...tification handler code here
""m_button.EnableWindow(TRUE);
}
// RadioSelect Button的点击响应函数
void CPrintDlg::OnRadioSelect()
{
""// TODO: Add your control notification handler code here
""m_button.EnableWindow(FALSE);
}
也可以通过一个Check Button的点击来改变，...
What happens to an open file handle on Linux if the pointed file gets moved or deleted
...
void perror_and_exit() {
perror(NULL);
exit(1);
}
int main(int argc, char *argv[]) {
int fd;
if ((fd = open("data", O_RDONLY)) == -1) {
perror_and_exit();
}
char buf[5];
for (int i = 0; i < 5; i++) {
bzero(buf, 5);
if (read(fd, buf, 5) != 5) {
perror_and_exit();
...
Parameterize an SQL IN clause
...
Here's a quick-and-dirty technique I have used:
SELECT * FROM Tags
WHERE '|ruby|rails|scruffy|rubyonrails|'
LIKE '%|' + Name + '|%'
So here's the C# code:
string[] tags = new string[] { "ruby", "rails", "scruffy", "rubyonrails" };
const string cmdText = "select * from t...
Repeating characters in VIM insert mode
Is there a way of repeating a character while in Vim's insert mode? For example, say I would like to insert 80 dashes, in something like emacs I would type:
...
How do I determine the size of my array in C?
...eOf(int intArray[]);
void printLength(int intArray[]);
int main(int argc, char* argv[])
{
int array[] = { 0, 1, 2, 3, 4, 5, 6 };
printf("sizeof of array: %d\n", (int) sizeof(array));
printSizeOf(array);
printf("Length of array: %d\n", (int)( sizeof(array) / sizeof(array[0]) ));
...
Find out if string ends with another string in C++
...
Simply compare the last n characters using std::string::compare:
#include <iostream>
bool hasEnding (std::string const &fullString, std::string const &ending) {
if (fullString.length() >= ending.length()) {
return (0 == ...
Is it better to reuse a StringBuilder in a loop?
...0) is far and away the most efficient answer. StringBuilder is backed by a char array and is mutable. At the point .toString() is called, the char array is copied and is used to back an immutable string. At this point, the mutable buffer of StringBuilder can be re-used, simply by moving the insertio...
Convert character to ASCII code in JavaScript
How can I convert a character to its ASCII code using JavaScript?
10 Answers
10
...
How to get the type of a variable in MATLAB?
...gt; a = 'Hi'
a =
Hi
>> class(b)
ans =
double
>> class(a)
ans =
char
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Regex: match everything but specific pattern
...oo):
Lookahead-based solution for NFAs:
^(?!foo).*$
^(?!foo)
Negated character class based solution for regex engines not supporting lookarounds:
^(([^f].{2}|.[^o].|.{2}[^o]).*|.{0,2})$
^([^f].{2}|.[^o].|.{2}[^o])|^.{0,2}$
a string ending with a specific pattern (say, no world. at the end):...