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How to get a reference to a module inside the module itself?
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import sys
current_module = sys.modules[__name__]
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ImportError in importing from sklearn: cannot import name check_build
...the kernel's socket connection. Fixed by renaming the file multiprocessing_.py (leading underscore did not work).
– pylang
Jan 11 '19 at 2:52
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How to define a reply-to address?
...lass Notifications < ActionMailer::Base
default :from => 'your_app@your_domain.com',
:reply_to => 'some_other_address@your_domain.com'
end
Or:
class Contacts < ActionMailer::Base
def new_contact
mail( :to => 'somebody@some_domain.com',
:from ...
Places where JavaBeans are used?
What is a JavaBean and why do I need it? Since I can create all apps with the class and interface structure? Why do I need beans? And can you give me some examples where beans are essential instead of classes and interfaces?
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How to create loading dialogs in Android?
Those dark spinning progress dialogs in the Amazon and Engadget apps - are those standard in Android?
2 Answers
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Are list-comprehensions and functional functions faster than “for loops”?
...(<the code object for `[x for x in range(10)]`>)
1 0 BUILD_LIST 0
3 LOAD_FAST 0 (.0)
>> 6 FOR_ITER 12 (to 21)
9 STORE_FAST 1 (x)
12 LOAD_FAST 1 (x)
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What's the difference between echo, print, and print_r in PHP?
I use echo and print_r much, and almost never use print .
11 Answers
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System.BadImageFormatException: Could not load file or assembly (from installutil.exe)
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Make sure the newest Framework (the one you compiled your app with) is first in the PATH. That solved the problem for me. (Found on a forum)
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Comparing strings with == which are declared final in Java
...llowing byte code:
Code:
0: ldc #2; //String str
2: astore_1
3: ldc #3; //String ing
5: astore_2
6: new #4; //class java/lang/StringBuilder
9: dup
10: invokespecial #5; //Method java/lang/StringBuilder."<init>":()V
13: aload_1
14: invo...
Checking images for similarity with OpenCV
...e the L2 relative error between images.
double errorL2 = norm( A, B, CV_L2 );
// Convert to a reasonable scale, since L2 error is summed across all pixels of the image.
double similarity = errorL2 / (double)( A.rows * A.cols );
return similarity;
}
else {
//Images have a differen...