大约有 3,379 项符合查询结果（耗时：0.0165秒） [XML]
Why is @autoreleasepool still needed with ARC?
...NSString *)messageOfTheDay {
return [[NSString alloc] initWithFormat:@"Hello %@!", self.username];
}
The string created in the method will have a retain count of one. Now who shall balance that retain count with a release?
The method itself? Not possible, it has to return the created object,...
How do I get a Cron like scheduler in Python? [closed]
...unction you want to schedule:
@repeatEveryDay(hour=6, minutes=30)
def sayHello(name):
print(f"Hello {name}")
sayHello("Bob") # Now this function will be invoked every day at 6.30 a.m
And the decorator will look like:
def repeatEveryDay(hour, minutes=0, seconds=0):
"""
Decorator tha...
Returning a boolean from a Bash function
...n
10 fi
11
12 false
13 }
14
15 function do_it(){
16 echo "Hello, old friend."
17 }
18
19 if i_should; then
20 do_it
21 fi
What we have here is...
Line 04 is an explicit[-ish] return true because the RHS of && only gets executed if the LHS was true
Line 09 returns e...
Efficient string concatenation in C++
...2 == <end result>
Compare that to the following:
std::string f = "hello";
(f + c)
calls string operator+(string const&, string const&)(f, c)
=> tmp1 == <end result>
It's using the same function for a temporary and for a named string! So the compiler has to copy the argu...
How do I make a splash screen?
... android:layout_height="wrap_content"
android:text="Hello World, splash"/>
</LinearLayout>
And your activity:
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
public class Splash extends Activity {...
How do I access named capturing groups in a .NET Regex?
...ns;
class Program
{
static void Main()
{
String sample = "hello-world-";
Regex regex = new Regex("-(?<test>[^-]*)-");
Match match = regex.Match(sample);
if (match.Success)
{
Console.WriteLine(match.Groups["test"].Value);
}
...
What's the meaning of interface{}?
...ollowing types satisfy the Empty interface
var a Empty
a = 5
a = 6.5
a = "hello"
But, does the Program type above satisfy it? Yes:
a = Program{} // ok
interface{} is equal to the Empty interface above.
var b interface{}
// true: a == b
b = a
b = 9
b = "bye"
As you see, there's nothing mys...
What is the JavaScript version of sleep()?
...}
Example of use:
function sleepThenAct(){ sleepFor(2000); console.log("hello js sleep !"); }
share
|
improve this answer
|
follow
|
...
Adding code to a javascript function programmatically
...var old_someFunction = someFunction;
someFunction = function(){
alert('Hello');
old_someFunction();
alert('Goodbye');
}
share
|
improve this answer
|
follow
...
instantiate a class from a variable in PHP?
...er_func).
example
class Foo {
static public function test() {
print "Hello world!\n";
}
}
call_user_func('Foo::test');//FOO is the class, test is the method both separated by ::
//or
call_user_func(array('Foo', 'test'));//alternatively you can pass the class and method as an array
If you...