大约有 26,000 项符合查询结果（耗时：0.0819秒） [XML]
Good tutorials on XMPP? [closed]
I've been looking at some open-source XMPP servers, and am familiar with the official page http://xmpp.org/ . But thus far I've not found anything in between " The Extensible Messaging and Presence Protocol (XMPP) is an open technology for real-time communication " and a list of XEP specifications....
JSON.NET Error Self referencing loop detected for type
... "$ref":"2"
},
"Id":2,
"Name":"Yogurt"
},
{
"$ref":"1"
}
],
"Id":1,
"Name":"Diary"
},
"Id":1,
"Name":"Whole Milk"
},
{
"$ref":"3"
}
]
The $...
Add Keypair to existing EC2 instance
...very, if it's an EBS boot AMI, you can stop it, make a snapshot of the volume. Create a new volume based on it. And be able to use it back to start the old instance, create a new image, or recover data.
Though data at ephemeral storage will be lost.
Due to the popularity of this question and an...
What's “requestCode” used for on PendingIntent?
...
requestCode is used to retrieve the same pending intent instance later on (for cancelling, etc).
Yes, my guess is the alarms will override each other. I would keep the request codes unique.
...
MySQL: How to copy rows, but change a few fields?
... is there any way to do it without having to specify the column names?
– Andrew
May 6 '10 at 18:00
4
...
Get top 1 row of each group
...
;WITH cte AS
(
SELECT *,
ROW_NUMBER() OVER (PARTITION BY DocumentID ORDER BY DateCreated DESC) AS rn
FROM DocumentStatusLogs
)
SELECT *
FROM cte
WHERE rn = 1
If you expect 2 entries per day, then this will arbitrarily pick one. To get both entries for a day, use DENSE_RANK instead...
How do you set the Content-Type header for an HttpClient request?
.../example.com/");
client.DefaultRequestHeaders
.Accept
.Add(new MediaTypeWithQualityHeaderValue("application/json"));//ACCEPT header
HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post, "relativeAddress");
request.Content = new StringContent("{\"name\":\"John Doe\",\"age\...
'is' versus try cast with null check
...
{
var myObjRef = (MyType)myObj.myProp; // needs to be cast a second time
// before using it as a MyType
...
}
to this:
var myObjRef = myObj.myProp as MyType; // only one cast
if (myObjRef != null)
{
// myObjRef is already MyType and doesn't ne...
Namespace and class with the same name?
I'm organizing a library project and I have a central manager class named Scenegraph and a whole bunch of other classes that live in the Scenegraph namespace.
...
What's the “average” requests per second for a production web application?
I have no frame of reference in terms of what's considered "fast"; I'd always wondered this but have never found a straight answer...
...