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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...
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
10
Active
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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...
SQL: capitalize first letter only [duplicate]
...
190
Are you asking for renaming column itself or capitalise the data inside column? If its data you'...
Mysql order by specific ID values
...
203
You can use ORDER BY and FIELD function.
See http://lists.mysql.com/mysql/209784
SELECT * FROM...
Prevent errors from breaking / crashing gulp watch
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260
Your swallowError function should look like this:
function swallowError (error) {
// If you ...
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
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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...
What's the right way to decode a string that has special HTML entities in it? [duplicate]
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409
This is my favourite way of decoding HTML characters. The advantage of using this code is that ...