大约有 12,000 项符合查询结果（耗时：0.0447秒） [XML]
How to define “type disjunction” (union types)?
...mplicit object StringWitness extends StringOrInt[String]
}
Next, declare foo like this:
object Bar {
def foo[T: StringOrInt](x: T) = x match {
case _: String => println("str")
case _: Int => println("int")
}
}
And that's it. You can call foo(5) or foo("abc"), and it will work,...
Custom Python list sorting
...ter alternative to implement the same sorting:
alist.sort(key=lambda x: x.foo)
Or alternatively:
import operator
alist.sort(key=operator.attrgetter('foo'))
Check out the Sorting How To, it is very useful.
share
...
The Concept of 'Hold space' and 'Pattern space' in sed
...out each host, with lots of junk in between that I dont care about.
Host: foo1
some junk, doesnt matter
some junk, doesnt matter
Info: about foo1 that I really care about!!
some junk, doesnt matter
some junk, doesnt matter
Info: a second line about foo1 that I really care about!!
some junk, doesnt ...
JSON datetime between Python and JavaScript
...this works:
date = datetime.datetime.now()
>>> json = dumps(dict(foo='bar', innerdict=dict(date=date)))
>>> json
'{"innerdict": {"date": "2010-07-15T13:16:38.365579"}, "foo": "bar"}'
>>> loads(json)
{u'innerdict': {u'date': datetime.datetime(2010, 7, 15, 13, 16, 38, 36557...
How to suppress “unused parameter” warnings in C?
...ing __attribute__ ((unused)) just before the parameter. For example:
void foo(workerid_t workerId) { }
becomes
void foo(__attribute__((unused)) workerid_t workerId) { }
share
|
improve this ans...
Why do I have to access template base class members through the this pointer?
... int A;
#endif
static const int x = 2;
template <typename T> void foo() { A *x = 0; }
if A is a type, that declares a pointer (with no effect other than to shadow the global x). If A is an object, that's multiplication (and barring some operator overloading it's illegal, assigning to an r...
Is 'float a = 3.0;' a correct statement?
...ific scenarios.
For performance reasons:
Specifically, consider:
float foo(float x) { return x * 0.42; }
Here the compiler will emit a conversion (that you will pay at runtime) for each returned value. To avoid it you should declare:
float foo(float x) { return x * 0.42f; } // OK, no conversi...
Best practices to test protected methods with PHPUnit
... $method->setAccessible(true);
return $method;
}
public function testFoo() {
$foo = self::getMethod('foo');
$obj = new MyClass();
$foo->invokeArgs($obj, array(...));
...
}
share
|
...
Overriding a JavaScript function while referencing the original
...roxy pattern really helped.....Actually I wanted to call a global function foo..
In certain pages i need do to some checks. So I did the following.
//Saving the original func
var org_foo = window.foo;
//Assigning proxy fucnc
window.foo = function(args){
//Performing checks
if(checkConditi...
argparse module How to add option without any argument?
...>>> p = ArgumentParser()
>>> _ = p.add_argument('-f', '--foo', action='store_true')
>>> args = p.parse_args()
>>> args.foo
False
>>> args = p.parse_args(['-f'])
>>> args.foo
True
...