大约有 47,000 项符合查询结果（耗时：0.0463秒） [XML]
Make a program run slowly
...ux scheduler will have this issue. There was some sort of thread analyzer from Intel afair. I see Vtune Release Notes. This is Vtune, but I was pretty sure there is another tool to analyze thread races. See: Intel Thread Checker, which can check for some thread race conditions. But we don't kno...
Possible to iterate backwards through a foreach?
...inq can help you.
A Linq extension method using anonymous types with Linq Select to provide a sorting key for Linq OrderByDescending;
public static IEnumerable<T> Invert<T>(this IEnumerable<T> source)
{
var transform = source.Select(
(o, i) => new
...
Linux: copy and create destination dir if it does not exist
...ersion of cp (and not, for instance, the Mac version), and
You are copying from some existing directory structure and you just need it recreated
then you can do this with the --parents flag of cp. From the info page (viewable at http://www.gnu.org/software/coreutils/manual/html_node/cp-invocation....
Escaping ampersand character in SQL string
...
straight from oracle sql fundamentals book
SET DEFINE OFF
select 'Coda & Sid' from dual;
SET DEFINE ON
how would one escape it without setting define.
share
|
improve this ans...
Useful GCC flags for C
...d.
-Wcast-qual: warn whenever a pointer is cast to remove a type qualifier from the target type*.
-Wswitch-default: warn whenever a switch statement does not have a default case*.
-Wswitch-enum: warn whenever a switch statement has an index of enumerated type and lacks a case for one or more of the ...
Assign output to variable in Bash
...
Same with something more complex...getting the ec2 instance region from within the instance.
INSTANCE_REGION=$(curl -s 'http://169.254.169.254/latest/dynamic/instance-identity/document' | python -c "import sys, json; print json.load(sys.stdin)['region']")
echo $INSTANCE_REGION
...
String concatenation in MySQL
...most DBMSs use of + or || for concatenation. It uses the CONCAT function:
SELECT CONCAT(first_name, " ", last_name) AS Name FROM test.student
As @eggyal pointed out in comments, you can enable string concatenation with the || operator in MySQL by setting the PIPES_AS_CONCAT SQL mode.
...
autolayout - make height of view relative to half superview height
...lso need to setup bottom, left, and right constraints, like normal)
. Then select the constraint and navigate to the Attribute inspector:
Then you can adjust the multiplier. If you want it 50% of the super view leave it at 1, since it is aligned per the super's center. This is also a great way to...
Intellisense and code suggestion not working in Visual Studio 2012 Ultimate RC
I have just downloaded and installed Visual Studio 2012 Ultimate RC, but I'm having an issue with the intellisense: it does not work until I press Ctrl + Space . Code suggestions are disabled also (method parameters for example).
...
How to detect Windows 64-bit platform with .NET?
...call to IsWow64Process will throw an exception since that entry is missing from kernel32.dll. You should check the solution shown from codeplex at 1code.codeplex.com/SourceControl/changeset/view/39074#842775 .I also have a solution based on that code listed at the bottom of this page, that uses exte...