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Naming convention for unique constraint
...n a unique constraint and a unique index is INCLUDE columns.
Edit: Feb 2013. Since SQL Server 2008, indexes can have filters too. Constraints can not
So, it comes down to one of
stick with UQ as per the rest of the SQL-using planet
use IK for unique indexes (IKC for clustered too) to be consist...
Android adding simple animations while setvisibility(view.Gone)
...view.animate().alpha(0.0f);
This fades it back in:
view.animate().alpha(1.0f);
This moves a View down by its height:
view.animate().translationY(view.getHeight());
This returns the View to its starting position after it has been moved somewhere else:
view.animate().translationY(0);
You ca...
What is the use for IHttpHandler.IsReusable?
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edited Feb 10 at 8:22
answered Mar 31 '11 at 14:03
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Algorithm to detect corners of paper sheet in photo
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edited Feb 27 '16 at 17:35
John_West
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Do login forms need tokens against CSRF attacks?
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127
Yes. In general, you need to secure your login forms from CSRF attacks just as any other.
Oth...
What do
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218
These are called generalized type constraints. They allow you, from within a type-parameterized...
Run a callback only if an attribute has changed in Rails
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Rails 5.1+
class Page < ActiveRecord::Base
before_save :do_something, if: :will_save_change_to_status_id?
private
def do_something
# ...
end
end
The commit that changed ActiveRecord::Dirty is here: https://github....
Why do Java webapps use .do extension? Where did it come from?
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To my knowledge, this convention has been spread by Struts1. The user guide puts it like this:
5.4.2 Configure the ActionServlet Mapping
Note: The material in this section is not specific to Struts. The
configuration of servlet mappings is
defined in the Java Servlet
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INSERT IF NOT EXISTS ELSE UPDATE?
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edited Jul 2 '14 at 6:34
answered Sep 3 '10 at 10:55
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Python super() raises TypeError
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132
The reason is that super() only operates on new-style classes, which in the 2.x series means e...