大约有 48,000 项符合查询结果（耗时：0.0587秒） [XML]
defaultdict of defaultdict?
...ultdict(int)) will be called when you try to access a key that don't exist and the return value of it will be set as the new value of this key which mean in our case the value of d[Key_dont_exist] will be defaultdict(int), and if you try to access a key from this last defaultdict i.e. d[Key_dont_exi...
How to create a bash script to check the SSH connection?
...wnhost -PN -p ssh | grep open`
$ echo $a
22/tcp open ssh
$ echo $b
(empty string)
But you'll have to grep the message (nmap does not use the return-value to show if a port was filtered, closed or open).
EDIT2:
If you're interested in the actual state of the ssh-port, you can substitute grep ope...
How can I echo a newline in a batch file?
...
Is it possible while providing a string within a single echo statement?
– Brian R. Bondy
Sep 25 '08 at 11:52
6
...
Wrapping StopWatch timing with a delegate or lambda?
...xample will profile the action lambda with 1-16 threads:
static void Main(string[] args)
{
Action action = () =>
{
for (int i = 0; i < 10000000; i++)
Math.Sqrt(i);
};
for(int i=1; i<=16; i++)
Console.WriteLine(i + " thread(s):\t" +
...
Disable git EOL Conversions
... Using * text=false does not unset text: it leaves text set to the string value false. This has the same effect as leaving text unspecified (not specifically unset). Using * -text gives it the special unset setting. Unsetting the text attribute on a path tells git not to attempt any end-of-l...
How to allow only numeric (0-9) in HTML inputbox using jQuery?
... happen, don't do anything
return;
}
var charValue = String.fromCharCode(e.keyCode)
, valid = /^[0-9]+$/.test(charValue);
if (!valid) {
e.preventDefault();
}
share
|
...
Maintain/Save/Restore scroll position when returning to a ListView
...re details:
On top on my ListActivity-derived class:
private static final String LIST_STATE = "listState";
private Parcelable mListState = null;
Then, some method overrides:
@Override
protected void onRestoreInstanceState(Bundle state) {
super.onRestoreInstanceState(state);
mListState = ...
Use C++ with Cocoa Instead of Objective-C?
...-runtime.h>
#include <iostream>
extern "C" int NSRunAlertPanel(CFStringRef strTitle, CFStringRef strMsg,
CFStringRef strButton1, CFStringRef strButton2,
CFStringRef strButton3, ...);
int main(int argc, char** argv)
{
id a...
Is it good practice to make the constructor throw an exception? [duplicate]
...So instead of throwing checked exceptions just do
public SomeObject(final String param) {
if (param==null) throw new NullPointerException("please stop");
if (param.length()==0) throw new IllegalArgumentException("no really, please stop");
}
Of course there are cases where it might just be...
Does a finally block always run?
...mediately halted. It's up to the code in the thread to detect interruption and stop its task, so finally code should run.
– Bart van Heukelom
Jul 18 '11 at 14:57
2
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