大约有 30,000 项符合查询结果(耗时:0.0584秒) [XML]
How to pass parameters to the DbContext.Database.ExecuteSqlCommand method?
Let's just suppose I have a valid need for directly executing a sql command in Entity Framework. I am having trouble figuring out how to use parameters in my sql statement. The following example (not my real example) doesn't work.
...
How can I get LINQ to return the object which has the max value for a given property? [duplicate]
...l loop through only once.
Item biggest = items.Aggregate((i1,i2) => i1.ID > i2.ID ? i1 : i2);
Thanks Nick - Here's the proof
class Program
{
static void Main(string[] args)
{
IEnumerable<Item> items1 = new List<Item>()
{
new Item(){ ClientID ...
Restful way for deleting a bunch of items
...:
From:
http://example.com/resources/
do a
POST with a selection of the ID's to:
http://example.com/resources/selections
which, if successful, should respond with:
HTTP/1.1 201 created, and a Location header to:
http://example.com/resources/selections/DF4XY7
On this page you will then see a (j...
Surrogate vs. natural/business keys [closed]
...
If you have multiple "candidate" keys (fields or same-size collections of fields that are NOT NULL UNIQUE) then you are likely in violation of Boyce-Codd Normal Form. BCNF is beyond 3NF, so not many people worry about it. There are situations, howev...
How do I kill background processes / jobs when my shell script exits?
... @user1431317 but you could redirect the output of jobs -p to a temporary file and read it from there for kill.
– jarno
Aug 22 at 5:39
|
sh...
Nginx location priority
...s.
Regular expressions, in the order they are defined in the configuration file.
If #3 yielded a match, that result is used. Otherwise, the match from #2 is used.
Example from the documentation:
location = / {
# matches the query / only.
[ configuration A ]
}
location / {
# matches any q...
Can I set enum start value in Java?
...re like classes - and they can even have multiple attributes.
public enum Ids {
OPEN(100), CLOSE(200);
private final int id;
Ids(int id) { this.id = id; }
public int getValue() { return id; }
}
The big difference is that they are type-safe which means you don't have to worry abou...
How to include “zero” / “0” results in COUNT aggregate?
... (and you need to use person as the "driving" table)
SELECT person.person_id, COUNT(appointment.person_id) AS "number_of_appointments"
FROM person
LEFT JOIN appointment ON person.person_id = appointment.person_id
GROUP BY person.person_id;
The reason why this is working, is that the outer (lef...
JavaScript for…in vs for
... @Nosredna: There's an issue about order of iteration for Chrome, filed by none other than John Resig, that is marked as WontFix. code.google.com/p/chromium/issues/detail?id=883 . Even before chrome, the order of iteration was not the same across browsers if you remove and then add a proper...
Real-world applications of zygohistomorphic prepromorphisms
...a on the landing page. The actual definition of the zygomorphism is in the file Main.hs - its different to the definition in the paper. It is "just" a zygomorphism not a "zygohistomorphic prepromorphisms" - a zygomorphism is the closest thing I've seen with a real world use. Though there are slides...
