大约有 13,922 项符合查询结果（耗时：0.0256秒） [XML]
When should std::move be used on a function return value? [duplicate]
... to the return value of meh is required to be the move constructor if one exists.
Adding move does have a potential effect, though: it prevents the move being elided, because return std::move(foo); is not eligible for NRVO.
As far as I know, 12.8/32 lays out the only conditions under which a copy ...
Truncate number to two decimal places without rounding
...
1
2
Next
229
...
End of support for python 2.7?
...
@Basic Except it's not full of vulnerabilities.
– Stian OK
Nov 27 '15 at 16:39
5
...
How do I delete rows in a data frame?
...by the '-' operator" -> This is a very misleading wording. Negative indexes are removed and that's it, there is no notion of complement. If you work with logical and try using - it won't work, because the complement operator for logicals is !. The complement of c(2,4,6) in the rows would rather b...
What is a “cache-friendly” code?
... can move data around in single clock cycles. However, registers are very expensive and most computer cores have less than a few dozen registers. At the other end of the memory spectrum (DRAM), the memory is very cheap (i.e. literally millions of times cheaper) but takes hundreds of cycles after a ...
Android Crop Center of Bitmap
...
This can be achieved with: Bitmap.createBitmap(source, x, y, width, height)
if (srcBmp.getWidth() >= srcBmp.getHeight()){
dstBmp = Bitmap.createBitmap(
srcBmp,
srcBmp.getWidth()/2 - srcBmp.getHeight()/2,
0,
srcBmp.getHeight(),
srcBmp.getHeight()
...
How do I compile C++ with Clang?
...
Also, for posterity -- Clang (like GCC) accepts the -x switch to set the language of the input files, for example,
$ clang -x c++ some_random_file.txt
This mailing list thread explains the difference between clang and clang++ well: Difference between clang and clang++
...
How do you loop in a Windows batch file?
What is the syntax for a FOR loop in a Windows batch file?
8 Answers
8
...
Calculate size of Object in Java [duplicate]
... do this in Java. Supposedly, C/C++ has sizeOf() method, but this is nonexistant in Java. I tried recording the free memory in the JVM with Runtime.getRuntime().freeMemory() before and after creating the object and then recording the difference, but it would only give 0 or 131304, and nothing in...
How do I put my website's logo to be the icon image in browser tabs?
The image next to the page title in the browser tab - how can you link an image here?
5 Answers
...