大约有 47,000 项符合查询结果（耗时：0.1144秒） [XML]
How do you copy a record in a SQL table but swap out the unique id of the new row?
...se to what I need, but my scenario is slightly different. The source table and destination table are the same and the primary key is a uniqueidentifier (guid). When I try this:
...
iOS difference between isKindOfClass and isMemberOfClass
What is the difference between the isKindOfClass:(Class)aClass and the isMemberOfClass:(Class)aClass functions?
I know it is something small like, one is global while the other is an exact class match but I need someone to specify which is which please.
...
What is the maximum length of a valid email address?
...hat is the maximum length of a valid email address? Is it defined by any standard?
6 Answers
...
Check if a string contains a substring in SQL Server 2005, using a stored procedure
...
CHARINDEX() searches for a substring within a larger string, and returns the position of the match, or 0 if no match is found
if CHARINDEX('ME',@mainString) > 0
begin
--do something
end
Edit or from daniels answer, if you're wanting to find a word (and not subcomponents of wo...
Example for boost shared_mutex (multiple reads/one write)?
I have a multithreaded app that has to read some data often, and occasionally that data is updated. Right now a mutex keeps access to that data safe, but it's expensive because I would like multiple threads to be able to read simultaneously, and only lock them out when an update is needed (the updat...
Case preserving substitute in Vim
...
We do not deserve Tim Pope.
– Andrew Keeton
May 23 '19 at 19:47
1
This plu...
What is the yield keyword used for in C#?
...uced in C# 2.0. In earlier versions you had to create your own IEnumerable and IEnumerator objects to do stuff like this.
The easiest way understand code like this is to type-in an example, set some breakpoints and see what happens. Try stepping through this example:
public void Consumer()
{
f...
explicit casting from super class to subclass
... telling the compiler "trust me. I'm a professional, I know what I'm doing and I know that although you can't guarantee it, I'm telling you that this animal variable is definitely going to be a dog."
Since the animal isn't actually a dog (it's an animal, you could do Animal animal = new Dog(); and ...
What is the difference between min SDK version/target SDK version vs. compile SDK version?
What are the differences between "min sdk version/target sdk version" and "compile sdk version"? I know what min and target sdk means, but what does compile sdk version mean?
...
Stream vs Views vs Iterators
What are the differences among Streams, Views (SeqView), and Iterators in scala? This is my understanding:
1 Answer
...