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What is a “callable”?
...
Called when the instance is ''called'' as a function
Example
class Foo:
def __call__(self):
print 'called'
foo_instance = Foo()
foo_instance() #this is calling the __call__ method
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What JSON library to use in Scala? [closed]
...:
import com.owlike.genson.defaultGenson_
val json = toJson(Person(Some("foo"), 99))
val person = fromJson[Person]("""{"name": "foo", "age": 99}""")
case class Person(name: Option[String], age: Int)
Disclaimer: I am Gensons author, but that doesn't meen I am not objective :)
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Java dynamic array sizes?
...u cannot simple create an ArrayList with 20 elements and then call set(15, foo).
You cannot directly change the size of an ArrayList. You do it indirectly using the various add, insert and remove methods.
If you want something more array-like, you will need to design your own API. (Maybe someone...
Running Bash commands in Python
...le as your standard input, and write your standard output to a file. grep 'foo' <inputfile >outputfile opens outputfile for writing and inputfile for reading, and passes its contents as standard input to grep, whose standard output then lands in outputfile. This is not generally hard to replac...
Can you do a partial checkout with Subversion?
...pth empty http://svnserver/trunk/proj
svn update --set-depth infinity proj/foo
svn update --set-depth infinity proj/bar
svn update --set-depth infinity proj/baz
Alternatively, --depth immediates instead of empty checks out files and directories in trunk/proj without their contents. That way you ca...
Why can't code inside unit tests find bundle resources?
...e bundleForClass:[self class]];
NSString *path = [bundle pathForResource:@"foo" ofType:@"txt"];
Then your code will search the bundle that your unit test class is in, and everything will be fine.
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Using wget to recursively fetch a directory with arbitrary files in it
... level 1 subfolders ('example.com/something' but not 'example.com/somthing/foo') And so on. If you insert no -l option, wget will use -l 5 automatically. If you insert a -l 0 you´ll download the whole Internet, because wget will follow every link it finds. stackoverflow.com/a/19695143/6785908
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Create subdomains on the fly with .htaccess (PHP)
...ou mean by that. If you mean, every time someone on the internet looks up foo.somedomain.com and it isn't cached, their DNS server has to resolve it, then yes.
– chaos
Feb 25 '09 at 14:26
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Can virtual functions have default parameters?
...er values are based on the static type.
Given
class A {
virtual void foo(int i = 1) { cout << "A::foo" << i << endl; }
};
class B: public A {
virtual void foo(int i = 2) { cout << "B::foo" << i << endl; }
};
void test() {
A a;
B b;
A* ap = &b;
a.foo(...
Swift Programming: getter/setter in stored property
...rarily wrong, you should wrap a computed property around it.
private var _foo:Int = 0
var foo:Int {
get {
return _foo
}
set {
if(newValue > 999) {
_foo = 999
} else {
_foo = newValue
}
}
}
Or:
private var _foo:Int = 0
var...