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Why can't C# interfaces contain fields?
...embers of an interface are--by definition--public, our backing variable is now exposed to anyone using the interface
Which myBackingVariable will MyClass use?
The most common approach taken is to declare the interface and a barebones abstract class that implements it. This allows you the flexibili...
General suggestions for debugging in R
...ou source() a .R file and it returns an error at line #n, but you need to know what function is located at line #n.
setBreakpoint() takes a source file name and line number and sets a breakpoint there
The codetools package, and particularly its checkUsage function can be particularly helpful in q...
How do I specify multiple targets in my podfile for my Xcode project?
...
CocoaPods 1.0 has changed the syntax for this. It now looks like this:
def shared_pods
pod 'SSKeychain', '~> 0.1.4'
pod 'INAppStoreWindow', :head
pod 'AFNetworking', '1.1.0'
pod 'Reachability', '~> 3.1.0'
pod 'KSADNTwitterFormatter', '~> 0.1.0'...
Windows 7 SDK installation failure
...
Microsoft now has a knowledge base article called Windows SDK Fails to Install with Return Code 5100 that describes this problem and its fix:
This issue occurs when you install the Windows 7 SDK on a computer that has a newer versi...
Is it possible to dynamically compile and execute C# code fragments?
...e future all existing client-supplied classes that implement the interface now become abstract, meaning you won't be able to compile or instantiate the client-supplied class at runtime.
I had this issue when it came time to add a new method after about 1 year of shipping the old interface and after...
MySQL, update multiple tables with one query
...rs. But there are too many books to go through each one and let's say you know that the ones that have an author_id that corresponds with an actual author are correct. It's just the ones that have nonexistent author_ids that are invalid. There is already an interface for the users to update the book...
Best way to center a on a page vertically and horizontally? [duplicate]
...
Excellent! I did not even know bottom: and right: existed in css...
– Louis van Tonder
Jun 14 '17 at 10:29
...
B-Tree vs Hash Table
...and thus are default.
However if you have a very precise use case and you know exactly what and only what is going to be needed, you can take advantage of hashing indexes.
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How to test that no exception is thrown?
I know that one way to do it would be:
15 Answers
15
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How do I execute inserts and updates in an Alembic upgrade script?
... teams[player.team_name]
session.commit()
# don't need team name now that team relationship is set
op.drop_column('players', 'team')
def downgrade():
bind = op.get_bind()
session = orm.Session(bind=bind)
# re-add the players.team column
op.add_column('players', sa.Co...