大约有 25,300 项符合查询结果（耗时：0.0536秒） [XML]
When to use nested classes and classes nested in modules?
...el class. For instance, in Java,
class Car {
class Wheel { }
}
only methods in the Car class can create Wheels.
Ruby doesn’t have that behaviour.
In Ruby,
class Car
class Wheel
end
end
differs from
class Car
end
class Wheel
end
only in the name of the class Wheel vs. Car::Wheel...
Replacing blank values (white space) with NaN in pandas
I want to find all values in a Pandas dataframe that contain whitespace (any arbitrary amount) and replace those values with NaNs.
...
How to convert NSDate into unix timestamp iphone sdk?
How to convert an NSDate into Unix timestamp? I've read many posts which do the reverse. But I'm not finding anything related to my question.
...
“loop:” in Java code. What is this, and why does it compile?
This code just made me stare at my screen for a few minutes:
12 Answers
12
...
scipy.misc module has no attribute imread?
...
You need to install Pillow (formerly PIL). From the docs on scipy.misc:
Note that Pillow is not a dependency of SciPy but the image manipulation functions indicated in the list below are not available without it:
...
imread
...
After...
GitHub authentication failing over https, returning wrong email address
...itHub from the command line (over https, not ssh) that calls for the username and password not only fails but, when it does, it returns
...
mysql - how many columns is too many?
...ht have upwards of 70 columns. I'm now thinking about splitting it up as some of the data in the columns won't be needed every time the table is accessed. Then again, if I do this I'm left with having to use joins.
...
Are memory leaks ever ok? [closed]
Is it ever acceptable to have a memory leak in your C or C++ application?
50 Answers
...
Determine which MySQL configuration file is being used
...or eg strace ./mysqld.
Among all the other system calls, you will find something like:
stat64("/etc/my.cnf", 0xbfa3d7fc) = -1 ENOENT (No such file or directory)
stat64("/etc/mysql/my.cnf", {st_mode=S_IFREG|0644, st_size=4227, ...}) = 0
open("/etc/mysql/my.cnf", O_RDONLY|O_LARGEFILE) = 3
S...
WARNING: Can't verify CSRF token authenticity rails
...
You should do this:
Make sure that you have <%= csrf_meta_tag %> in your layout
Add beforeSend to all the ajax request to set the header like below:
$.ajax({ url: 'YOUR URL HERE',
type: 'POST',
beforeSend: function(xhr) {xhr.setRequestHeader('X-CSRF-Token', $('meta[n...