大约有 48,000 项符合查询结果（耗时：0.0558秒） [XML]
What's the difference between ConcurrentHashMap and Collections.synchronizedMap(Map)?
...
What about the synchronizedMap?
– Samuel Edwin Ward
Jul 24 '15 at 21:16
3
...
What's an object file in C?
...am reading about libraries in C but I have not yet found an explanation on what an object file is. What's the real difference between any other compiled file and an object file?
I would be glad if someone could explain in human language.
...
Count the number occurrences of a character in a string
What's the simplest way to count the number of occurrences of a character in a string?
19 Answers
...
What are the best practices for using a GUID as a primary key, specifically regarding performance?
...must, you could probably argue to use it for the PRIMARY KEY of the table. What I'd strongly recommend not to do is use the GUID column as the clustering key, which SQL Server does by default, unless you specifically tell it not to.
You really need to keep two issues apart:
the primary key is a l...
Why is there a difference in checking null against a value in VB.NET and C#?
...ed logic, as explained here.
The C# team made different assumptions about what NULL means, resulting in the behaviour difference you show. Eric Lippert wrote a blog about the meaning of NULL in C#. Per Eric Lippert: "I also wrote about the semantics of nulls in VB / VBScript and JScript here and h...
failed to serialize the response in Web API
... This answer does not provide a solution to use xml, and that is what he asked for.
– honestduane
Dec 6 '15 at 20:32
...
What is Inversion of Control?
... public TextEditor() {
this.checker = new SpellChecker();
}
}
What we've done here creates a dependency between the TextEditor and the SpellChecker.
In an IoC scenario we would instead do something like this:
public class TextEditor {
private IocSpellChecker checker;
public Te...
What to return if Spring MVC controller method doesn't return value?
...
so what will be the return type.. is it HTTP status code?
– spandey
Jan 23 '18 at 5:30
...
How did I get a value larger than 8 bits in size from an 8-bit integer?
... valid consequence, there is actually no undefined behaviour in your code. What's happening is that the compiler thinks the behaviour is undefined, and optimises accordingly.
If c is defined as int8_t, and int8_t promotes to int, then c-- is supposed to perform the subtraction c - 1 in int arithmet...
What is the overhead of creating a new HttpClient per call in a WebAPI client?
What should be the HttpClient lifetime of a WebAPI client?
Is it better to have one instance of the HttpClient for multiple calls?
...