大约有 44,000 项符合查询结果（耗时：0.0665秒） [XML]
difference and when to use getApplication(), getApplicationContext(), getBaseContext() and someClass
... activity context.
Tips: Whenever you need to manipulate Views then go for
Activity-Context, else Application-Context would be enough.
share
|
improve this answer
|
fo...
Set value to null in WPF binding
...<TextBox Text="{Binding Price, TargetNullValue=''}"/>
Which stands for (thanks Gregor for your comment):
<TextBox Text="{Binding Price, TargetNullValue={x:Static sys:String.Empty}}"/>
sys is the imported xml namespace for System in mscorlib:
xmlns:sys="clr-namespace:System;assembly...
C++ Exceptions questions on rethrow of original exception
...d then thrown anew (at a different "magical location" 0x98e70b0 -- because for all the compiler knows err could be an object on the stack about to be unwinded, like e was at 0xbfbce430, not in the "magical location" at 0x98e7058), so you will lose derived-class-specific data during the copy-construc...
Why does int num = Integer.getInteger(“123”) throw NullPointerException?
...ame is empty or null, or if the property does not have the correct numeric format, then null is returned.
In other words, this method has nothing to do with parsing a String to an int/Integer value, but rather, it has to do with System.getProperty method.
Admittedly this can be quite a surprise....
Using Rails 3.1 assets pipeline to conditionally use certain css
...plication-ie", :media => "all" %>
<![endif]-->
Lastly, don't forget to include these new manifest files in your config/environments/production.rb:
config.assets.precompile += %w( application-all.css application-print.css application-ie.css )
Update:
As Max pointed out, if you follo...
Wrapping null-returning method in Java with Option in Scala?
...eptions.
Using Try to catch an exception and converting that to an Option for convenience will only show None in case an exception happens.
scala> Try(1/0).toOption
res11: Option[Int] = None
You want to preserve the values that come out of Try. That may be null.
But it is also true that the ...
How do I change bash history completion to complete what's already on the line?
...like
# ~/.inputrc
"\e[A": history-search-backward
"\e[B": history-search-forward
or equivalently,
# ~/.bashrc
if [[ $- == *i* ]]
then
bind '"\e[A": history-search-backward'
bind '"\e[B": history-search-forward'
fi
(the if statement checks for interactive mode)
Normally, Up and Down ...
nginx: [emerg] could not build the server_names_hash, you should increase server_names_hash_bucket_s
... server it gives me Job failed. See system journal and 'systemctl status' for details.
I thought it was because of the dashes, so I tried just various other domains with and without hyphens, but no luck. Same error. what could be causing this? I also tried rebooting, I am really at a loss here. A...
Sending a JSON to server and retrieving a JSON in return, without JQuery
...
Sending and receiving data in JSON format using POST method
// Sending and receiving data in JSON format using POST method
//
var xhr = new XMLHttpRequest();
var url = "url";
xhr.open("POST", url, true);
xhr.setRequestHeader("Content-Type", "application/json"...
Node.js: Difference between req.query[] and req.params
...: "Direct access to req.body, req.params, and req.query should be favoured for clarity - unless you truly accept input from each object." - express documentation
– Ryan Q
Sep 25 '13 at 6:09
...