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使用Activity启动器组件 · App Inventor 2 中文网
...性 DataType 和 DataURI 在 App Inventor 中设置这些。 还有一个 Extras 属性，它采用键和值的列表并指定相应键的属性值。 你必须设置的特定值取决于你要启动的活动。
这里有些例子。
警告：这些示例中的值取决于应用程序用户设备...
Inner class within Interface
... EDITOR("editor"),
VANILLA("regular user");
private String description;
private Role(String description) {
this.description = description;
}
public String getDescription() {
return description;
}
}
public Strin...
Difference between Hashing a Password and Encrypting it
...sible, you apply the secure hash algorithm and you cannot get the original string back. The most you can do is to generate what's called "a collision", that is, finding a different string that provides the same hash. Cryptographically secure hash algorithms are designed to prevent the occurrence of ...
Comparing two java.util.Dates to see if they are in the same day
...= new LocalDate( dt2.withZone( zone ) );
return ld1.equals( ld2 );
}
String Representation
Another approach is to create a string representation of the date portion of each date-time, then compare strings.
Again, the assigned time zone is crucial.
DateTimeFormatter formatter = ISODateTimeFo...
What type of hash does WordPress use?
..., so you can have many types of hashes with different salts and feeds that string into a function that knows how to match it with some other value.
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How does this site infecting script work?
...
Notice the replace call after the giant messy string: .replace(/#|\$|@|\^|&|\(|\)|\!/ig, '').
It removes most of the special characters, turning it into a normal URL:
evil://dyndns-org.gamestop.com.mybestyouxi-cn.genuinehollywood.ru:8080/softonic.com/softonic.com/g...
How did I get a value larger than 8 bits in size from an 8-bit integer?
...s extended to bit-width sizeof(int) . As I understand it, incrementing a char shouldn't ever be undefined behavior as long as sizeof(char) < sizeof(int) . But that doesn't explain how c is getting an impossible value. As an 8-bit integer, how can c hold values greater than its bit-width...
What is the advantage of using REST instead of non-REST HTTP?
... which way round).
I think the caching arguments are wrong, because query strings are generally cached, and besides you don't really need to use them. For example django makes something like this very easy, and I wouldn't say it was REST:
GET /get_article/1/
POST /delete_article/ id=1
Or eve...
In C, do braces act as a stack frame?
...stack frame. Otherwise, you would not be able to do something like this:
char var = getch();
{
char next_var = var + 1;
use_variable(next_char);
}
If curly braces caused a true stack push/pop (like a function call would), then the above code would not compile because the ...
Are string.Equals() and == operator really same? [duplicate]
...pes of the objects:
// Avoid getting confused by interning
object x = new StringBuilder("hello").ToString();
object y = new StringBuilder("hello").ToString();
if (x.Equals(y)) // Yes
// The compiler doesn't know to call ==(string, string) so it generates
// a reference comparision instead
if (x ==...