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Why does the 260 character path length limit exist in Windows?
...null] = 260. One could assume that 256 is a reasonable fixed string length from the DOS days. And going back to the DOS APIs we realize that the system tracked the current path per drive, and we have 26 (32 with symbols) maximum drives (and current directories).
The INT 0x21 AH=0x47 says “This fu...
Android SharedPreference security
...en if they were created with MODE_PRIV
Still there is a way to protect it from everybody...
Please checkout this link.
Here you can store data in pref with encryption,the class is self explanatory and very easy to use.
https://github.com/sveinungkb/encrypted-userprefs
As said by others anyone can...
Specify an SSH key for git push for a given domain
...eems it was passing along multiple identities and one of those was blocked from accessing the host.
– Fitter Man
Jul 10 '14 at 20:03
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show ...
Solving “The ObjectContext instance has been disposed and can no longer be used for operations that
... to find out where the reference is or isn't set, right-click its name and select "Find All References". You can then place a breakpoint at every location that requests data, and run your program with the debugger attached. Every time the debugger breaks on such a breakpoint, you need to determine w...
Running multiple async tasks and waiting for them all to complete
...; sequence, Func<T, Task> action) {
return Task.WhenAll(sequence.Select(action));
}
Call it like this:
await sequence.ForEachAsync(item => item.SomethingAsync(blah));
Or with an async lambda:
await sequence.ForEachAsync(async item => {
var more = await GetMoreAsync(item);
...
Correct use of transactions in SQL Server
..._ABORT ON -- Turns on rollback if T-SQL statement raises a run-time error.
SELECT * FROM T; -- Check before.
BEGIN TRAN
INSERT INTO T VALUES ('A');
INSERT INTO T VALUES ('B');
INSERT INTO T VALUES ('B');
INSERT INTO T VALUES ('C');
COMMIT TRAN
SELECT * FROM T; -- Check after.
DELETE ...
How to use Git and Dropbox together effectively?
...dd origin ~/Dropbox/git/project.git
~/project $ git push -u origin master
From there, you can just clone that ~/Dropbox/git/project.git directory (regardless of whether it belongs to your Dropbox account or is shared across multiple accounts) and do all the normal Git operations—they will be sync...
Http长连接200万尝试及调优 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... eth0 (bnx2):Broadcom NetXtreme II BCM5709 Gigabit Ethernet,1000Mb/s
OS: RHEL Server 5.4 (Tikanga), Linux 2.6.18-164.el5 x86_64, 64-bit
服务端程序很简单，基于nginx写的一个comet模块，该模块接受用户的请求，然后保持用户的连接，而不返回...
Algorithm to return all combinations of k elements from n
... takes an array of letters as an argument and a number of those letters to select.
71 Answers
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How can I reliably determine the type of a variable that is declared using var at design time?
...o resolve the type. For instance:
var items = myList.OfType<Foo>().Select(foo => foo.Bar);
The return type is IEnumerable<Bar>, but resolving this required knowing:
myList is of type that implements IEnumerable.
There is an extension method OfType<T> that applies to IEnume...