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How to debug a Flask app
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$env:FLASK_ENV = "development"
Prior to Flask 1.0, this was controlled by the FLASK_DEBUG=1 environment variable instead.
If you're using the app.run() method instead of the flask run command, pass debug=True to enable debug mode.
Tracebacks are also printed to the terminal running the server,...
Can I disable autolayout for a specific subview at runtime?
... wraps to its content which is then scrolled and zoomed around a superview by manipulating the frame origin. Autolayout fights with this at runtime.
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Why does calling a method in my derived class call the base class method?
...t be the original member, if no
derived class has overridden the member. By default, methods are
non-virtual. You cannot override a non-virtual method. You cannot use
the virtual modifier with the static, abstract, private or override
modifiers, MSDN.
Using New for Shadowing
You are using...
What is the 'cls' variable used for in Python classes?
...lass method. Check this reference for further details.
EDIT: As clarified by Adrien, it's a convention. You can actually use anything but cls and self are used (PEP8).
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Nested or Inner Class in PHP
...B needs access to
members of A that would otherwise be declared private. By hiding class
B within class A, A's members can be declared private and B can access
them. In addition, B itself can be hidden from the outside world.
Nested classes can lead to more readable and maintainable code.
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Does PostgreSQL support “accent insensitive” collations?
...her alternative would be this module with an IMMUTABLE unaccent() function by Musicbrainz, provided on Github. Haven't tested it myself. I think I have come up with a better idea:
Best for now
This approach is more efficient as other solutions floating around, and safer.
Create an IMMUTABLE SQL wr...
How to get a pixel's x,y coordinate color from an image?
...as your image and has the image drawn on it.
var img = document.getElementById('my-image');
var canvas = document.createElement('canvas');
canvas.width = img.width;
canvas.height = img.height;
canvas.getContext('2d').drawImage(img, 0, 0, img.width, img.height);
After that, when a user clicks, use...
Immutable vs Unmodifiable collection
.... It just makes sure that the collection itself cannot be altered (and not by wrapping, but by copying). The objects which are present in the collection can still be altered, and no guarantee is given on those.
– Hiery Nomus
Jan 17 '12 at 9:44
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Overriding id on create in ActiveRecord
...at for picklists and small tables that change infrequently and only change by developers. So when going from ActiveHash to ActiveRecord, it's easiest to just keep all of the foreign key references the same.
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How to write logs in text file when using java.util.logging.Logger
I have a situation in which I want to write all logs created by me into a text file.
10 Answers
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