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Is 'switch' faster than 'if'?
...)
movl %edi, %eax
cmpl $19, %edi
jbe .LBB0_1
retq
.LBB0_1:
jmpq *.LJTI0_0(,%rax,8)
jmp void call<0u>() # TAILCALL
jmp void call<1u>() # TAILCALL
jmp void call<2u>() # TA...
MySQL DROP all tables, ignoring foreign keys
...der for the drop statements to work if you need:
SET FOREIGN_KEY_CHECKS = 0
This will disable referential integrity checks - so when you are done performing the drops you need, you will want to reset key checking with
SET FOREIGN_KEY_CHECKS = 1
The final execution should look like:
SET FO...
What is the difference between syntax and semantics in programming languages?
...
10 Answers
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Catch Ctrl-C in C
...atile int keepRunning = 1;
void intHandler(int dummy) {
keepRunning = 0;
}
// ...
int main(void) {
signal(SIGINT, intHandler);
while (keepRunning) {
// ...
Edit in June 2017: To whom it may concern, particularly those with an insatiable urge to edit this answer. Look, I wrote...
How to use double or single brackets, parentheses, curly braces
...ets seem to evaluate quite a lot quicker than single ones.
$ time for ((i=0; i<10000000; i++)); do [[ "$i" = 1000 ]]; done
real 0m24.548s
user 0m24.337s
sys 0m0.036s
$ time for ((i=0; i<10000000; i++)); do [ "$i" = 1000 ]; done
real 0m33.478s
user 0m33.478s
sys 0m0.000s
The br...
Difference between Convert.ToString() and .ToString()
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Servy
190k2323 gold badges279279 silver badges394394 bronze badges
answered May 13 '10 at 15:46
RyanRyan
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How do synchronized static methods work in Java and can I use it for loading Hibernate entities?
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answered Feb 23 '09 at 20:35
OscarRyzOscarRyz
180k106106 gold badges363363 silver badges540540 bronze badges
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iOS: how to perform a HTTP POST request?
...on didReceiveResponse:(NSURLResponse *)response {
[self.data setLength:0];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)d {
[self.data appendData:d];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
[[[[UIAlertView al...
提升速度：XP注册表与驱动优化 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...改这个值为你的CPU的二级缓存的大小，填写的时候使用10进制值。你可以通过修改Dword值“SecondLevelDataCache”将CPU的2级缓存变为256KB，然后重新启动电脑即可。
2、修改磁盘缓存加速XP
磁盘缓存对XP运行起着至关重要的作用，但是...
What's the right way to decode a string that has special HTML entities in it? [duplicate]
...
409
This is my favourite way of decoding HTML characters. The advantage of using this code is that ...