大约有 16,000 项符合查询结果（耗时：0.0345秒） [XML]
Programmatically open Maps app in iOS 6
... completionHandler:^(NSArray *placemarks, NSError *error) {
// Convert the CLPlacemark to an MKPlacemark
// Note: There's no error checking for a failed geocode
CLPlacemark *geocodedPlacemark = [placemarks objectAtIndex:0];
MKPlacemark *placemark = [[MKPlacemark a...
What is the meaning of CTOR?
...h .cctor() whereas the instance field will be initialized through .ctor()
internal sealed class CtorExplorer
{
protected int a = 0;
protected static int b = 0;
}
share
|
improve this answer
...
SQLite select where empty?
...umn IS NULL OR some_column = '';
Test case:
CREATE TABLE your_table (id int, some_column varchar(10));
INSERT INTO your_table VALUES (1, NULL);
INSERT INTO your_table VALUES (2, '');
INSERT INTO your_table VALUES (3, 'test');
INSERT INTO your_table VALUES (4, 'another test');
INSERT INTO your_ta...
Why doesn't ruby support method overloading?
...ignatures can be either,
Arguments with different data types, eg: method(int a, int b) vs method(String a, String b)
Variable number of arguments, eg: method(a) vs method(a, b)
We cannot achieve method overloading using the first way because there is no data type declaration in ruby(dynamic type...
Maven in Eclipse: step by step installation [closed]
...eft panel
Finally,
Click on an existing project
Select Configure -> Convert to Maven Project
share
|
improve this answer
|
follow
|
...
str performance in python
...hon code ( python 2.6 up to 3.2 ), I discovered that the
str method to convert an object (in my case an integer) to a string is almost an order of magnitude slower than using string formatting.
...
ValueError: math domain error
...sult
is calculated in a way which is accurate for x near zero.
You may convert back to the original value using math.expm1 which returns e raised to the power x, minus 1.
share
|
improve this an...
Real world example about how to use property feature in python?
... the distance in metres
# All units provided using setters will be converted before
# being stored
self._distance = 0.0
@property
def in_metres(self):
return self._distance
@in_metres.setter
def in_metres(self, val):
try:
self._di...
Debugging automatic properties
Is there any way to set breakpoint on setter/getter in auto-implemented property?
5 Answers
...
Sending a message to nil in Objective-C
...sing a very contrived example. Let's say you have a method in Java which prints out all of the elements in an ArrayList:
void foo(ArrayList list)
{
for(int i = 0; i < list.size(); ++i){
System.out.println(list.get(i).toString());
}
}
Now, if you call that method like so: someOb...