大约有 44,000 项符合查询结果（耗时：0.0725秒） [XML]
Facebook database design?
...
It said that Facebook has around 1'000'000'000 users. If the average user has 100 friends, that means the table would contain 100'000'000'000 rows. MySQL partitioning?
– veidelis
Jun 4 '14 at 7:30
...
EJB's - when to use Remote and/or local interfaces?
...Java EE is that it is easy to scale (which I believe means you can deploy different components on different servers). Is that where Remote and Local interfaces come in? Are you supposed to use Remote interfaces if you expect your application to have different components on different servers? And use...
Python 3.x rounding behavior
...ard the higher number. With large numbers of calculations, this can be significant. The Python 3.0 approach eliminates this issue.
There is more than one method of rounding in common use. IEEE 754, the international standard for floating-point math, defines five different rounding methods (the one u...
Replace part of a string with another string
...m, const std::string& to) {
size_t start_pos = str.find(from);
if(start_pos == std::string::npos)
return false;
str.replace(start_pos, from.length(), to);
return true;
}
std::string string("hello $name");
replace(string, "$name", "Somename");
In response to a comment...
Can't connect to MySQL server error 111 [closed]
...y means that your MySQL server is only listening the localhost interface.
If you have lines like this :
bind-address = 127.0.0.1
In your my.cnf configuration file, you should comment them (add a # at the beginning of the lines), and restart MySQL.
sudo service mysql restart
Of course, to do t...
What are the disadvantages to declaring Scala case classes?
If you're writing code that's using lots of beautiful, immutable data structures, case classes appear to be a godsend, giving you all of the following for free with just one keyword:
...
How to list branches that contain a given commit?
...ranch --contains <commit>
Only list branches which contain the specified commit (HEAD if not specified). Implies --list.
git branch -r --contains <commit>
Lists remote tracking branches as well (as mentioned in user3941992's answer below) that is "local branches that have a direct ...
How to delete multiple files at once in Bash on Linux?
...
Don't use "rm" if you wish to restore the files in future .You can use "rm-trash" utility : github.com/nateshmbhat/rm-trash
– Natesh bhat
Nov 20 '18 at 14:28
...
Call an activity method from a fragment
...ctivity to fragment:
FragmentManager fm = getSupportFragmentManager();
//if you added fragment via layout xml
YourFragmentClass fragment = (YourFragmentClass)fm.findFragmentById(R.id.your_fragment_id);
fragment.yourPublicMethod();
If you added fragment via code and used a tag string when you add...
cmake and libpthread
... was part way there. You can add the compiler option as well, like this:
If you have CMake 3.1.0+, this becomes even easier:
set(THREADS_PREFER_PTHREAD_FLAG ON)
find_package(Threads REQUIRED)
target_link_libraries(my_app PRIVATE Threads::Threads)
If you are using CMake 2.8.12+, you can simplify...