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How to design a product table for many kinds of product where each product has many parameters
...e table for Products, storing attributes common to all product types. One extra column stores a BLOB of semi-structured data, in XML, YAML, JSON, or some other format. This BLOB allows you to store the attributes specific to each product type. You can use fancy Design Patterns to describe this, s...
Why should the “PIMPL” idiom be used? [duplicate]
...
@Rob, I'm guessing there very little overhead to this. An extra class, but there is very little to them. Just a thin wrapper around the existing class. Someone correct me if I'm wrong, but the memory usage would just be an extra function table in RAM, a pointer to the pimpl and a re...
可重入函数、不可重入函数及线程安全 - C/C++ - 清泛网 - 专注C/C++及内核技术
...
}
signal(SIGALRM,func);
alarm(1);
}
int main(int argc, char** argv)
{
signal(SIGALRM,func);
alarm(1);
for(;;)
{
if( ( ptr = getpwnam("sar") ) == NULL )
{
err_sys( "getpwnam error" );
}
}
return 0;
}
signal...
How can I run a PHP script in the background after a form is submitted?
...y notification process that happens (or doesn't). (shell_exec returns as a string and this was easier than using exec, assigning the output to a variable and then opening a file to write to.)
I'm using the following line to invoke the email script:
shell_exec("/path/to/php /path/to/send_notificati...
How to copy commits from one branch to another?
...heckout v2.1
git merge wss-to-rebase
Note: the reason that it takes some extra work in order to do this is that it's creating duplicate commits in your repository. This isn't really a good thing - the whole point of easy branching and merging is to be able to do everything by making commit(s) one ...
When should we call System.exit in Java
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In that case, it's not needed. No extra threads will have been started up, you're not changing the exit code (which defaults to 0) - basically it's pointless.
When the docs say the method never returns normally, it means the subsequent line of code is effect...
How to unit test an object with database queries
...a, but applies to all OO-languages)
class Database {
public Result query(String query) {... real db here ...}
}
class MockDatabase extends Database {
public Result query(String query) {
return "mock result";
}
}
class ObjectThatUsesDB {
public ObjectThatUsesDB(Database db) {
this....
Auto layout constraints issue on iOS7 in UITableViewCell
...issue:
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
self = [super initWithStyle:UITableViewCellStyleDefault reuseIdentifier:reuseIdentifier];
if (self)
{
self.contentView.autoresizingMask = UIViewAutoresizingFlexibleHeight|UIViewA...
What are the differences between local branch, local tracking branch, remote branch and remote track
...m:Flimm/example.git
HEAD branch: master
Remote branches:
io-socket-ip new (next fetch will store in remotes/origin)
master tracked
new-branch tracked
Local ref configured for 'git pull':
master merges with remote master
new-branc...
Is there a download function in jsFiddle?
...the very own, for example, http://jsfiddle.net/Ua8Cv, if you just type the extra /show at the address bar and hit enter (followed by the browser show source code shortcut) to get the source.
– heltonbiker
Sep 30 '12 at 18:32
...