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What is the correct way to start a mongod service on linux / OS X?
I've installed mongodb and have been able to run it, work with it, do simple DB read / write type stuff. Now I'm trying to set up my Mac to run mongod as a service.
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What are the basic rules and idioms for operator overloading?
...::ios::failbit);
return is;
}
When implementing operator>>, manually setting the stream’s state is only necessary when the reading itself succeeded, but the result is not what would be expected.
Function call operator
The function call operator, used to create function objects, also k...
How to generate a random int in C?
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Note: Don't use rand() for security. If you need a cryptographically secure number, see this answer instead.
#include <time.h>
#include <stdlib.h>
srand(time(NULL)); // Initialization, should only be called once.
int r = rand(); // Returns a pseudo-random integer bet...
Where are shared preferences stored?
...ces are stored in an xml file in the app data folder, i.e.
/data/data/YOUR_PACKAGE_NAME/shared_prefs/YOUR_PREFS_NAME.xml
or the default preferences at:
/data/data/YOUR_PACKAGE_NAME/shared_prefs/YOUR_PACKAGE_NAME_preferences.xml
SharedPreferences added during runtime are not stored in the Eclip...
Play audio file from the assets directory
...e file in the assets
directory. The asset directory contents are not actually 'real files'
on disk. All of them are put together one after another. So, if you do
not specify where to start and how many bytes to read, the player will
read up to the end (that is, will keep playing all the file...
Is there a “do … until” in Python? [duplicate]
...is is a similar construct, taken from the link above.
while True:
do_something()
if condition():
break
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Suggestions for debugging print stylesheets?
...; Rendering Settings > Emulate media > print
– allicarn
Jul 7 '16 at 22:22
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How to grep (search) committed code in the Git history
...s and the like), you need to do:
git grep <regexp> $(git rev-list --all)
git rev-list --all | xargs git grep <expression> will work if you run into an "Argument list too long" error.
If you want to limit the search to some subtree (for instance, "lib/util"), you will need to pass tha...
Shortcut to exit scale mode in VirtualBox [closed]
...tings, as the Menu bar is hidden in Scale View.
Had the same issue, especially when you checked the box not to show the 'Switch to Scale view' dialog.
This you can do while the VM is running.
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How do I convert a double into a string in C++?
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The boost (tm) way:
std::string str = boost::lexical_cast<std::string>(dbl);
The Standard C++ way:
std::ostringstream strs;
strs << dbl;
std::string str = strs.str();
Note: Don't forget #include <sstream>
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