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Is there something like Annotation Inheritance in java?
...ame question.
@interface Animal {
boolean fluffy() default false;
String name() default "";
}
@Extends(Animal.class)
@Animal(fluffy = true)
@interface Pet {
String name();
}
@Extends(Pet.class)
@interface Cat {
@AliasFor("name")
String value();
}
@Extends(Pet.class)
@interfac...
How to write a simple Html.DropDownListFor()?
...ass:
public class Color
{
public int ColorId { get; set; }
public string Name { get; set; }
}
And let's say that you have the following model:
public class PageModel
{
public int MyColorId { get; set; }
}
And, finally, let's say that you have the following list of colors. They coul...
Updating address bar with new URL without hash or reloading the page
...he MDN docs.
TL;DR, you can do this:
window.history.pushState("object or string", "Title", "/new-url");
See my answer to Modify the URL without reloading the page for a basic how-to.
share
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imp...
JsonMappingException: out of START_ARRAY token
...
Your JSON string is malformed: the type of center is an array of invalid objects. Replace [ and ] with { and } in the JSON string around longitude and latitude so they will be objects:
[
{
"name" : "New York",
"num...
How to store CGRect values in NSMutableArray?
...
CGRect rect = CGRectMake( 5, 5, 40, 30 );
NSString* rectAsString = NSStringFromCGRect( rect );
CGRect original = CGRectFromString( rectAsString );
What do you think about this way to store CGRect dates?
...
Regex match everything after question mark?
...entheses are a capturing group that you can use to extract the part of the string you are interested in.
If the string can contain new lines you may have to use the "dot all" modifier to allow the dot to match the new line character. Whether or not you have to do this, and how to do this, depends o...
Why is volatile not considered useful in multithreaded C or C++ programming?
...ic operations necessary to implement a mutex; it only has volatile to make extra guarantees about ordinary operations.
Now you have something like this:
pthread_mutex_lock( &flag_guard_mutex );
my_local_state = my_shared_flag; // critical section
pthread_mutex_unlock( &flag_guard_mutex );
...
How is Generic Covariance & Contra-variance Implemented in C# 4.0?
...unced to support Generic covariance and contra-variance. That is, List<string> can be assigned to List<object> . How could that be?
...
Post an empty body to REST API via HttpClient
...
Use StringContent or ObjectContent which derive from HttpContent or you can use null as HttpContent:
var response = await client.PostAsync(requestUri, null);
...
10 条真心有趣的 Linux 命令 - 创意 - 清泛网 - 专注C/C++及内核技术
...会限制一个句子的输出长度。
# fortune -s
3.yes
# yes <string>
这个命令会不停打印字符串，直到用户把这进程给结束掉。
# yes unixmen
4.figlet
这个命令可以用apt-get安装，安装之后，在/usr/share/figlet可以看到一些ascii字体文件...