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What do numbers using 0x notation mean?
...ourth-last digit times 4096 (16^3)
...and so on
The factors 1, 16, 256, etc. are the increasing powers of 16.
0x6400 = (0*1) + (0*16^1) + (4*16^2) + (6*16^3) = 25600
or
0x6400 = (0*1) + (0*16) + (4*256) + (6*4096) = 25600
...
std::vector versus std::array in C++
...re added or removed. It provides all the hooks (begin(), end(), iterators, etc) that make it work fine with the rest of the STL. It also has several useful methods that let you perform operations that on a normal array would be cumbersome, like e.g. inserting elements in the middle of a vector (it h...
javax.faces.application.ViewExpiredException: View could not be restored
... on which I logout, then I come back to first page and I click on any link etc or refresh page I get this exception. I guess it's normal (or maybe not:)) because I logged out and session is destroyed. What should I do to redirect user to for example index.xhtml or login.xhtml and save him from seein...
How should I organize Python source code? [closed]
...s utils.py for this example)
Move whatever classes, functions, statements, etc you need from main.py into utils.py
In main.py add a single line at the top: import utils
Conceptually what this does is to create a new module called utils in another source file. You can then import it wherever it's ...
php Replacing multiple spaces with a single space [duplicate]
... Unlike other answers, this command only replaces spaces (not newlines, etc...), which is exactly what is needed! Thank you so much!
– itoctopus
Oct 23 '19 at 12:21
add a c...
c++ boost::multi_index composite keys efficiency - C/C++ - 清泛网 - 专注C/C++及内核技术
...performed by the first key, then the second key if the first one is equal, etc". Does this mean that the structure is stored such that a lookup for a specific 2-part composite key will take O(n=1) time, i.e. is the container sorted such that there is a pointer directly to each item, or does the boos...
Technically what is the main difference between Oracle JDK and OpenJDK? [duplicate]
...arted to notice random/unknown fatal error and crashes (with H.264 codecs, etc.), and it was a nightmare till then to get ride of system crash+fatal errors caused by OpenJDK.
...
sass --watch with automatic minify?
...
If you are using JetBrains editors like IntelliJ IDEA, PhpStorm, WebStorm etc. Use the following settings in Settings > File Watchers.
Convert style.scss to style.css set the arguments
--no-cache --update $FileName$:$FileNameWithoutExtension$.css
and output paths to refresh
$FileNameWitho...
How to fix Git error: object file is empty?
...nges something, but with a new copy-to name, e.g. .git-old-1, .git-old-2, etc.):
cp -a .git .git-old
Step 2: Run git fsck --full
nathanvan@nathanvan-N61Jq:~/workspace/mcmc-chapter$ git fsck --full
error: object file .git/objects/8b/61d0135d3195966b443f6c73fb68466264c68e is empty
fatal: loose o...
What's the difference between QMainWindow, QWidget and QDialog?
...tions to make it work well with common buttons on dialogs (accept, reject, etc.).
QMainWindow is designed around common needs for a main window to have. It has predefined places for a menu bar, a status bar, a toolbar, and other widgets. It does not have any built-in allowances for buttons like Q...