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How can I find the last element in a List?
... the list is empty. So if you get 0 back from a List<int> you won't know if the list was empty or the last value was 0. In short, you need to check the Count whichever retrieval mechanism you decide to use.
– 0b101010
Nov 7 '14 at 16:23
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Do any JVM's JIT compilers generate code that uses vectorized floating point instructions?
...
So, basically, you want your code to run faster. JNI is the answer. I know you said it didn't work for you, but let me show you that you are wrong.
Here's Dot.java:
import java.nio.FloatBuffer;
import org.bytedeco.javacpp.*;
import org.bytedeco.javacpp.annotation.*;
@Platform(include = "Dot.h...
Class method decorator with self arguments?
...an pass in the attribute name as a string to the decorator and use getattr if you don't want to hardcode the attribute name:
def check_authorization(attribute):
def _check_authorization(f):
def wrapper(self, *args):
print getattr(self, attribute)
return f(self, *...
HTML5 Pre-resize images before uploading
...nt this doesn't cover is maintaining the orientation information, without knowledge of this metadata the image is resized and saved as-is, losing any metadata within the image for orientation meaning that images taken on a tablet device "upside down" were rendered as such, although they would have b...
How to access data/data folder in Android device?
I am developing an app and I know my database *.db will appear in data/data/com.****.***
18 Answers
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__attribute__ - C/C++ - 清泛网 - 专注C/C++及内核技术
...e__((noreturn))
extern void myexit();
int test(int n)
{
if ( n > 0 )
{
myexit();
/* 程序不可能到达这里*/
}
else
return 0;
}
编译显示的输出信息为：
$gcc –Wall...
Django ManyToMany filter()
...s in the many-to-many and many-to-one tests. Here is syntax for your specific problem:
users_in_1zone = User.objects.filter(zones__id=<id1>)
# same thing but using in
users_in_1zone = User.objects.filter(zones__in=[<id1>])
# filtering on a few zones, by id
users_in_zones = User.objec...
Download a file by jQuery.Ajax
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2019 modern browsers update
This is the approach I'd now recommend with a few caveats:
A relatively modern browser is required
If the file is expected to be very large you should likely do something similar to the original approach (iframe and cookie) because some of the belo...
How can I detect if the user is on localhost in PHP?
In other words, how can I tell if the person using my web application is on the server it resides on? If I remember correctly, PHPMyAdmin does something like this for security reasons.
...
Why does Vim save files with a ~ extension?
...automatic creation of backup files, use (in your vimrc):
set nobackup
set nowritebackup
Where nowritebackup changes the default "save" behavior of Vim, which is:
write buffer to new file
delete the original file
rename the new file
and makes Vim write the buffer to the original file (resultin...