大约有 15,000 项符合查询结果（耗时：0.0285秒） [XML]
What is the difference between dynamic and static polymorphism in Java?
...= new Car(); //here Type is vehicle but object will be Car
vehicle.start(); //Car's start called because start() is overridden method
}
}
class Vehicle {
public void start() {
System.out.println("Inside start method of Vehicle");
}
}
class Car extends Vehicle {
...
How to see if an NSString starts with a certain other string?
I am trying to check to see if a string that I am going to use as URL starts with http. The way I am trying to check right now doesn't seem to be working. Here is my code:
...
Convert a 1D array to a 2D array in numpy
...array without using Numpy.
l = [i for i in range(1,21)]
part = 3
new = []
start, end = 0, part
while end <= len(l):
temp = []
for i in range(start, end):
temp.append(l[i])
new.append(temp)
start += part
end += part
print("new values: ", new)
# for uneven cases
te...
Using module 'subprocess' with timeout
... def run(self, timeout):
def target():
print 'Thread started'
self.process = subprocess.Popen(self.cmd, shell=True)
self.process.communicate()
print 'Thread finished'
thread = threading.Thread(target=target)
thread.start()
...
Get contentEditable caret index position
...child nodes that have child nodes...)
a selection can consist of different start and end positions (e.g. multiple chars are selected)
the node containing a Caret start/end may not be either the element or its direct children
Here's a way to get start and end positions as offsets to the element's t...
Example: Communication between Activity and Service using Messaging
...ationContext(), YourService.class);
intent.putExtra("SomeData","ItValue");
startService(intent);
And after in service in onStartCommand() get data from intent.
For sending data or event from a service to an application (for one or more activities):
private void sendBroadcastMessage(String intent...
Calling a method every x minutes
...
var startTimeSpan = TimeSpan.Zero;
var periodTimeSpan = TimeSpan.FromMinutes(5);
var timer = new System.Threading.Timer((e) =>
{
MyMethod();
}, null, startTimeSpan, periodTimeSpan);
...
What does yield mean in PHP?
...
simple example
<?php
echo '#start main# ';
function a(){
echo '{start[';
for($i=1; $i<=9; $i++)
yield $i;
echo ']end} ';
}
foreach(a() as $v)
echo $v.',';
echo '#end main#';
?>
output
#start main# {start[1,2,3,4,5,6,7,8,...
How to run an EXE file in PowerShell with parameters with spaces and quotes
...
When PowerShell sees a command starting with a string it just evaluates the string, that is, it typically echos it to the screen, for example:
PS> "Hello World"
Hello World
If you want PowerShell to interpret the string as a command name then use the...
Sequelize.js: how to use migrations and sync
...nostic migration tool for Node.JS to perform pending migrations before app starts.
You can get a list of pending/not yet executed migrations like this:
umzug.pending().then(function (migrations) {
// "migrations" will be an Array with the names of
// pending migrations.
});
Then execute mig...