大约有 40,000 项符合查询结果（耗时：0.0519秒） [XML]
How expensive is RTTI?
...ime if you can afford to do
if (typeid(a) == typeid(b)) {
B* ba = static_cast<B*>(&a);
etc;
}
instead of
B* ba = dynamic_cast<B*>(&a);
if (ba) {
etc;
}
The former involves only one comparison of std::type_info; the latter necessarily involves traversing an inheritanc...
OPTION (RECOMPILE) is Always Faster; Why?
...lding your statistics. This can be done by running the following:
EXEC sp_updatestats
And then recreating your execution plan. This will ensure that when your execution plan is created it will be using the latest information.
Adding OPTION(RECOMPILE) rebuilds the execution plan every time that...
What does Java option -Xmx stand for? [duplicate]
...ged. To learn about XX commands, please see this: docs.oracle.com/cd/E13150_01/jrockit_jvm/jrockit/jrdocs/refman/…
– Nishant
Sep 30 '14 at 6:11
16
...
How to show all privileges from a user in oracle?
...
You can try these below views.
SELECT * FROM USER_SYS_PRIVS;
SELECT * FROM USER_TAB_PRIVS;
SELECT * FROM USER_ROLE_PRIVS;
DBAs and other power users can find the privileges granted to other users with the DBA_ versions of these same views. They are covered in the docume...
UITableViewCell Separator disappearing in iOS7
...
I dumped the subview hierarchy of affected cells and found that the _UITableViewCellSeparatorView was set to hidden. No wonder it's not shown!
I overrode layoutSubviews in my UITableViewCell subclass and now the separators are displayed reliably:
Objective-C:
- (void)layoutSubviews {
[...
Adding an onclick function to go to url in JavaScript?
...uery to send a user to a different URL you can do it like this:
$("a#thing_to_click").on('click', function(){
window.location = "http://www.google.com/";
});
this way will work too but the above is the newer more correct way to do it these days
$("a#thing_to_click").click(function(e){
...
What is JSON and why would I use it?
...nguages too.
A useful link for detail is here:
http://secretgeek.net/json_3mins.asp
share
|
improve this answer
|
follow
|
...
How do you comment out code in PowerShell?
...ES
File Name : xxxx.ps1
Author : J.P. Blanc (jean-paul_blanc@silogix-fr.com)
Prerequisite : PowerShell V2 over Vista and upper.
Copyright 2011 - Jean Paul Blanc/Silogix
.LINK
Script posted over:
http://silogix.fr
.EXAMPLE
Example 1
.EXAMPLE
Example 2
#&...
CodeIgniter: How to get Controller, Action, URL information
...ollowing work, but am currently unable to test:
$this->router->fetch_class();
$this->router->fetch_method();
share
|
improve this answer
|
follow
...
iTerm 2: How to set keyboard shortcuts to jump to beginning/end of line?
...7f" backward-kill-line' >> ~/.zshrc
# adds redo
$ echo 'bindkey "^X^_" redo' >> ~/.zshrc
# reload your .zshrc for changes to take effect
$ source ~/.zshrc
I'm unable to find a solution for adding redo in bash or readline, so if anyone know a solution for either of those, please commen...