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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...
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...
What's the difference between => , ()=>, and Unit=>
... value (I'm simulating the setTimeout function in JavaScript, if you must know.)
4 Answers
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Create and append dynamically
...= 'block';
document.getElementsByTagName('body')[0].appendChild(iDiv);
// Now create and append to iDiv
var innerDiv = document.createElement('div');
innerDiv.className = 'block-2';
// The variable iDiv is still good... Just append to it.
iDiv.appendChild(innerDiv);
http://jsfiddle.net/W4Sup/1/
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What's the difference between ContentControl and ContentPresenter?
...o need to specify ContentSource as it is the default value.
For those who know angularJs: this is similar to transclude mecanism.
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C# Interfaces. Implicit implementation versus Explicit implementation
...Explicit is when you define methods within your class on the interface. I know that sounds confusing but here is what I mean: IList.CopyTo would be implicitly implemented as:
public void CopyTo(Array array, int index)
{
throw new NotImplementedException();
}
and explicitly as:
void ICollecti...
jQuery/JavaScript to replace broken images
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@Sugendran $.browser has been deprecated and removed now, use feature detection instead (gets more complicated in this case).
– lee penkman
Dec 3 '14 at 22:20
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Connect Java to a MySQL database
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Hi @SeanOwen I wonder that, why do we close rs and stmt? Why not just conn?
– Kamuran Sönecek
Apr 14 '16 at 6:37
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How to document Ruby code?
...look at the RDoc documentation to learn about the kinds of tags that RDoc knows how to format. To that end, I'd reformat your comment as follows:
# Runs a subprocess and applies handlers for stdout and stderr
# Params:
# +command+:: command line string to be executed by the system
# +outhan...
Update statement with inner join on Oracle
...orked for me. I like that one because it looks clean and readable. Don't know what the pros and cons are between the two when it comes to performance. But, I wasn't worried about that for now 'cuz I used this for a one off script to correct bad data.
– nemo
Ma...