大约有 30,000 项符合查询结果（耗时：0.0457秒） [XML]
Finding the average of a list
...
@Steinfeld I don't think conversion to string is the best way to go here. You can achieve the same in a cleaner way with round(result, 2).
– yprez
Mar 3 '19 at 10:57
...
What is a thread exit code?
...or code 259 even after calling Wait(). Here is my code: static void Main(string[] args) { var t = new Task<object>(() => SomeOp(2)); t.Start(); t.Wait(); } The thing is, Tasks are executed by thread pool threads and based on thread pool'...
What are the differences between poll and select?
...oth have this limit. But I
see that BSD/OS 2.1 has now been coded to avoid this limit, so it's
doable, just a small matter of programming. :-) Someone should file a
Solaris bug report on this, and see if it ever gets fixed.
With poll(), however, the user must allocate an array of pollf...
javac error: Class names are only accepted if annotation processing is explicitly requested
...this in a file called Main.java:
public Main{
public static void main(String[] args){
System.out.println("ok");
}
}
Then compile it like this:
user@defiant /home/user $ javac Main
error: Class names, 'Main', are only accepted if
annotation processing is explicitly requested
1 er...
Can jQuery read/write cookies to a browser?
...okies is easy, but reading them is sort of a pain, since you have to split strings and stuff. If you're already using JQuery, then the cookie plugin could be nice...... An annoying thing about reading cookies is that some browsers remove the final semicolon and some don't.... nice to have someone el...
Why I am Getting Error 'Channel is unrecoverably broken and will be disposed!'
...
I got similar error (my app crashes) after I renamed something in strings.xml and forgot to modify other files (a preference xml resource file and java code).
IDE (android studio) didn't showed any errors. But, after I repaired my xml files and java code, app ran okay. So, maybe there are...
Create timestamp variable in bash script
... I came here looking for this exactly. I.e. the proper format string to get a unix timestamp from date. However, I also upvoted the "correct" answer. I wasn't looking for that, but it's a better answer to the original question and it's also really useful to me.
– v...
How to remove all the null elements inside a generic list in one go?
...null.
Here's a test:
class Test { }
class Program
{
static void Main(string[] args)
{
var list = new List<Test>();
list.Add(null);
Console.WriteLine(list.OfType<Test>().Count());// 0
list.Add(new Test());
Console.WriteLine(list.OfType<...
How to detect first time app launch on an iPhone
... UserDefaults.standard
if let isAppAlreadyLaunchedOnce = defaults.string(forKey: "isAppAlreadyLaunchedOnce"){
print("App already launched : \(isAppAlreadyLaunchedOnce)")
return true
}else{
defaults.set(true, forKey: "isAppAlreadyLaunchedOnce")
...
how to change uiviewcontroller title independent of tabbar item title
...on title
/// - tabBarTitle: TabBar title
func setTitles(navigationTitle: String, ta