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Set Viewbag before Redirect
...ata["shortMessage"] content
ViewBag.Message = TempData["shortMessage"].ToString();
return View();
}
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Default value in Doctrine
...can use:
<?php
/**
* @Entity
*/
class myEntity {
/**
* @var string
*
* @Column(name="myColumn", type="string", length="50")
*/
private $myColumn = 'myDefaultValue';
...
}
PHP-level default values are preferred as these are also properly available on newly crea...
C# 通过代码安装、卸载、启动、停止服务 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...区
#region 安装服务
private void InstallService(string filepath, string serviceName)
{
try
{
IDictionary _SavedState = new Hashtable();
ServiceController service = new ServiceController(serviceName);
...
Apache and Node.js on the Same Server
...writeCond %{REQUEST_URI} ^socket.io [NC]
RewriteCond %{QUERY_STRING} transport=websocket [NC]
RewriteRule /{.*} ws://localhost:3000/$1 [P,L]
RewriteCond %{HTTP:Connection} Upgrade [NC]
RewriteRule /(.*) ws://localhost:3000/$1 [P,L]
ProxyPass /nodejs http://loca...
Null vs. False vs. 0 in PHP
...ot found anything, but 0 if it has found something at the beginning of the string !
<?php
// pitfall :
if (strrpos("Hello World", "Hello")) {
// never exectuted
}
// smart move :
if (strrpos("Hello World", "Hello") !== False) {
// that works !
}
?>
And of course, if you deal with ...
pandas GroupBy columns with NaN (missing) values
...l stumbles over this--another workaround is to convert via .astype(str) to string before grouping. That will conserve the NaN's.
df = pd.DataFrame({'a': ['1', '2', '3'], 'b': ['4', np.NaN, '6']})
df['b'] = df['b'].astype(str)
df.groupby(['b']).sum()
a
b
4 1
6 3
nan 2
...
Installing python module within code
...(but with each option as a separate entry in the list, instead of a single string). And to specify which version of the package you want, do the same as on the command line.. ex: pip.main(['install', 'pip==7.1.0'])
– Kaos
Jul 20 '15 at 10:18
...
Comments in Android Layout xml
...nnot use it inside a tag.
For example:
<TextView
android:text="@string/game_title"
<!-- This is a comment -->
android:layout_height="wrap_content"
android:layout_width="fill_parent"/>
is wrong and will give following error
Element type "TextView" must be followed ...
Getting the encoding of a Postgres database
...
A programmatic solution:
SELECT pg_encoding_to_char(encoding) FROM pg_database WHERE datname = 'yourdb';
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GIT: Checkout to a specific folder
...important. The exported name is literally just prefixed with the specified string.
If you want to export a certain directory, there are some tricks involved. The command only takes files, not directories. To apply it to directories, use the 'find' command and pipe the output to git.
find dirname ...