大约有 45,000 项符合查询结果（耗时：0.0685秒） [XML]
Python: Append item to list N times
...why the first method is only a good idea for constant values, like ints or strings, is because only a shallow copy is does when using the <list>*<number> syntax, and thus if you did something like [{}]*100, you'd end up with 100 references to the same dictionary - so changing one of them...
What are the disadvantages to declaring Scala case classes?
...ically defined
Possible in any class by prefixing params with val
Decent toString() implementation
Yes, very useful, but doable by hand on any class if necessary
Compliant equals() and hashCode()
Combined with easy pattern-matching, this is the main reason that people use case classes
Companion obje...
How do you implement a private setter when using an interface?
...terface you can define only getter for your property
interface IFoo
{
string Name { get; }
}
However, in your class you can extend it to have a private setter -
class Foo : IFoo
{
public string Name
{
get;
private set;
}
}
...
Preferred way of loading resources in Java
...rch three places as shown below. Comments welcome.
public URL getResource(String resource){
URL url ;
//Try with the Thread Context Loader.
ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
if(classLoader != null){
url = classLoader.getResource(res...
Custom attributes in styles.xml
... did eventually get what I was working on functioning. I eventually used a string for the declare-stylable instead of an enum. I'm not certain why enums weren't working, but this work-around was good enough for me.
– Paul Lammertsma
Dec 19 '11 at 15:21
...
How do I “git blame” a deleted line?
...w the contents of the line, this is an ideal use case for:
git log -S <string> path/to/file
which shows you commits which introduce or remove an instance of that string. There's also the -G<regex> which does the same thing with regular expressions! See man git-log and search for the -...
RAW POST using cURL in PHP
... I just realized that body goes here can include any valid json string.
– shasi kanth
Jul 31 '15 at 7:40
2
...
How to identify whether a file is normal file or directory
...
os.path.isdir('string')
os.path.isfile('string')
share
|
improve this answer
|
follow
|
...
Java - No enclosing instance of type Foo is accessible
...ce of Hello before creating an instance of Thing.
public static void main(String[] args)
{
Hello h = new Hello();
Thing thing1 = h.new Thing(); // hope this syntax is right, typing on the fly :P
}
The last solution (a non-static nested class) would be mandatory if any instance of Thing d...
In Django, how does one filter a QuerySet with dynamic field lookups?
...
Just a quick gotcha heads-up: make sure the strings in the kwargs are of type str not unicode, else filter() will grumble.
– Steve Jalim
Apr 4 '11 at 9:30
...