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What's the difference between std::move and std::forward
...alue of type X and returns an rvalue of type X.
With std::forward you can select the destination to some extent:
X x;
std::forward<Y>(x);
Casts the lvalue expression x of type X to an expression of type Y. There are constraints on what Y can be.
Y can be an accessible Base of X, or a ref...
Simple explanation of MapReduce?
...e reduced to a scalar value.
So if you think of it like a SQL statement
SELECT SUM(salary)
FROM employees
WHERE salary > 1000
GROUP by deptname
We can use map to get our subset of employees with salary > 1000
which map emits to the barrier into group size buckets.
Reduce will sum each of...
Cross browser JavaScript (not jQuery…) scroll to top animation
...rollTo(document.body, 0, 600);
}
var scrollme;
scrollme = document.querySelector("#scrollme");
scrollme.addEventListener("click",runScroll,false)
function scrollTo(element, to, duration) {
if (duration <= 0) return;
var difference = to - element.scrollTop;
var perTick = difference...
CSS filter: make color image with transparency white
...ich contains
the respective RGBA values for every pixel
in the selected region of the context
(note i+=4 in the loop)
*/
for (var i = 0; i < imgData.data.length; i+=4) {
imgData.data[i] = 255; //Red, 0-255
imgData.data[i+1] = 255; //Green, 0-255
imgDa...
What are the main performance differences between varchar and nvarchar SQL Server data types?
... AND ([URLa] IS NULL OR [URLu] IS NULL))
);
In this model you only SELECT from the [URL] computed column. For inserting and updating, you determine which field to use by seeing if converting alters the incoming value, which has to be of NVARCHAR type:
INSERT INTO TableName (..., URLa, URLu)...
Message 'src refspec master does not match any' when pushing commits in Git
...been added. git add --all in case you wish to add all the files Or you can selectively add files. Then git commit -m "Initial comment", git push origin master. This will surely work.
– Bhanu Pratap Singh
May 20 '15 at 7:57
...
Eclipse RCP开发桌面程序 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... 2
3 import org.eclipse.swt.SWT;
4 import org.eclipse.swt.events.SelectionAdapter;
5 import org.eclipse.swt.events.SelectionEvent;
6 import org.eclipse.swt.widgets.Button;
7 import org.eclipse.swt.widgets.Dialog;
8 import org.eclipse.swt.widgets.Display;
9 import org.ec...
XSLT getting last element
...put the last() indexing on the nodelist result, rather than as part of the selection criteria. Try:
(//element[@name='D'])[last()]
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MIME type warning in chrome for png images
...The quickest way around the spam that I've found is to use the CTRL key to select Errors, Warnings and Debug instead of all.
All:
Errors, Warnings and Debug:
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Can I disable autolayout for a specific subview at runtime?
...
Open project in 4.5
Select storyboard
Open the file inspector
Under Interface Builder Document uncheck 'Use Autolayout'
You can split across multiple storyboards if you want to use autolayout for some views.
...