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What are the rules for the “…” token in the context of variadic templates?
...t appears on the right side of an expression (call this expression pattern for a moment), or it's a pack argument if it appears on left side of the name:
...thing // pack : appears as template arguments
thing... // unpack : appears when consuming the arguments
The rule is that whatever pattern ...
How to get GET (query string) variables in Express.js on Node.js?
...
In Express it's already done for you and you can simply use req.query for that:
var id = req.query.id; // $_GET["id"]
Otherwise, in NodeJS, you can access req.url and the builtin url module to url.parse it manually:
var url = require('url');
var url_par...
搭建高可用mongodb集群（三）—— 深入副本集内部机制 - 大数据 & AI - 清...
...为1是不显示的，这里标示出来。
rs.conf();
{
"_id" : "rs0",
"version" : 9,
"members" : [
{
"_id" : 0,
"host" : "192.168.1.136:27017" },
{
...
Do zombies exist … in .NET?
...edure after locking on some object, and then is at some point terminated before the lock can be released. This situation has the potential to crash the system, because eventually, attempts to execute that method will result in the threads all waiting for access to an object that will never be retur...
How do I get class name in PHP?
...;
}
}
$obj = new ClassName();
echo $obj->getNameOfClass();
?>
For older versions of PHP, you can use get_class().
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WPF - How to force a Command to re-evaluate 'CanExecute' via its CommandBindings
...ommand I've defined. The associated CommandBinding provides a callback for the evaluation of CanExecute which controls the enabled state of each MenuItem .
...
How do I activate a virtualenv inside PyCharm's terminal?
...env-in-terminal, PyCharm 2016.3 (released Nov 2016) has virutalenv support for terminals out of the box
Auto virtualenv is supported for bash, zsh, fish, and Windows cmd. You
can customize your shell preference in Settings (Preferences) | Tools
| Terminal.
Old Method:
Create a file .pych...
How to check if an email address exists without sending an email?
... a VRFY command. Very few servers support this command, but it is intended for exactly this. If the server responds with a 2.0.0 DSN, the user exists.
VRFY user
You can issue a RCPT, and see if the mail is rejected.
MAIL FROM:<>
RCPT TO:<user@domain>
If the user doesn't exist, you...
Get Android API level of phone currently running my application [duplicate]
...d.os.Build.VERSION, which is a static class that holds various pieces of information about the Android OS a system is running.
If you care about all versions possible (back to original Android version), as in minSdkVersion is set to anything less than 4, then you will have to use android.os.Build.V...
Where does Chrome store extensions?
...
Storage Location for Unpacked Extensions
Extension engine does not explicitly change their location or add a reference to its local paths, they are left in the place where there are selected from in all Operating Systems.
Ex: If i load a un...