大约有 31,500 项符合查询结果（耗时：0.0467秒） [XML]
What's the difference between @JoinColumn and mappedBy when using a JPA @OneToMany association
...
@MykhayloAdamovych: No, that's actually not quite right. If Branch doesn't have a property which references Company, but the underlying table has a column which does, then you can use @JoinTable to map it. This is an unusual situation, because you would normal...
Create numpy matrix filled with NaNs
...r operations in numpy.
You can create an uninitialized array and assign to all entries at once:
>>> a = numpy.empty((3,3,))
>>> a[:] = numpy.nan
>>> a
array([[ NaN, NaN, NaN],
[ NaN, NaN, NaN],
[ NaN, NaN, NaN]])
I have timed the alternatives a[:] ...
How to print (using cout) a number in binary form?
...ter. FYI, casting doesn't work, the bitset variable is an object of some really arcane-looking bitset3ul (?!) class. Best to let the abstractions do the work!
– nirvanaswap
Mar 16 '16 at 5:39
...
Using Auto Layout in UITableView for dynamic cell layouts & variable row heights
...each cell's content and subviews determine the row height (itself/automatically), while maintaining smooth scrolling performance?
...
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.
...
Floating point vs integer calculations on modern hardware
...
From my experience, there are many, many variables to performance...especially between integer & floating point math. It varies strongly from processor to processor (even within the same family such as x86) because different processors have different "pipeline" lengths. Also, some operations ...
Easiest way to activate PHP and MySQL on Mac OS 10.6 (Snow Leopard), 10.7 (Lion), 10.8 (Mountain Lio
...c/apache2/libphp5.so"
And uncomment it (remove the #).
Download and install the latest MySQL version from mysql.com. Choose the x86_64 version for Intel (unless your Intel Mac is the original Macbook Pro or Macbook, which are not 64 bit chips. In those cases, use the 32 bit x86 version).
Install...
Download single files from GitHub
...does not support downloading parts of the repository. You have to download all of it. But you should be able to do this with GitHub.
When you view a file it has a link to the "raw" version. The URL is constructed like so
https://raw.githubusercontent.com/user/repository/branch/filename
By fillin...
How can I convert a string to boolean in JavaScript?
...
What about "TRUE" in all uppercase, for example?
– BMiner
Aug 10 '11 at 22:45
108
...
“Register” an .exe so you can run it from any command line in Windows
...er that's on the PATH environment variable.
You can do this by either installing it into a folder that's already on the PATH or by adding your folder to the PATH.
You can have your installer do this - but you will need to restart the machine to make sure it gets picked up.
...