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Efficiently updating database using SQLAlchemy ORM
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SQLAlchemy's ORM is meant to be used together with the SQL layer, not hide it. But you do have to keep one or two things in mind when using the ORM and plain SQL in the same transaction. Basically, from one side, ORM data modifications will only hit the database when you flush the changes from y...
Set ImageView width and height programmatically?
How can I set an ImageView 's width and height programmatically?
14 Answers
14
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Using an RDBMS as event sourcing storage
...h EventSource corresponds to an actual Aggregate Root.)
Table Events:
Id [uniqueidentifier] NOT NULL,
TimeStamp [datetime] NOT NULL,
Name [varchar](max) NOT NULL,
Version [varchar](max) NOT NULL,
EventSourceId [uniqueidentifier] NOT NULL,
Sequence [bigint],
Data [nva...
What does $$ mean in the shell?
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In Bash $$ is the process ID, as noted in the comments it is not safe to use as a temp filename for a variety of reasons.
For temporary file names, use the mktemp command.
sh...
How to change the DataTable Column Name?
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I just tried this solution now and it works fine - it did not do any changes or wipe out the underlying column data. Maybe something else is happening in your code...
– AshesToAshes
Aug 15 '13 at 15:25
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What is the proper way to re-attach detached objects in Hibernate?
...ch detached objects to a hibernate session, although an object of the same identity MAY already exist in the session, which will cause errors.
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PHP Pass variable to next page
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HTML / HTTP is stateless, in other words, what you did / saw on the previous page, is completely unconnected with the current page. Except if you use something like sessions, cookies or GET / POST variables. Sessions and cookies are quite easy to use, with session being by far...
How to sort a NSArray alphabetically?
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The simplest approach is, to provide a sort selector (Apple's documentation for details)
Objective-C
sortedArray = [anArray sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)];
Swift
let descriptor: NSSortDescriptor = NSSortDescriptor(...
Unknown Column In Where Clause
... edited Oct 29 '15 at 9:44
idmean
12.4k77 gold badges4343 silver badges7777 bronze badges
answered Sep 30 '08 at 15:41
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CROSS JOIN vs INNER JOIN in SQL
...e result:
Cross join
select * from table1 cross join table2 where table1.id = table2.fk_id
Inner join
select * from table1 join table2 on table1.id = table2.fk_id
Use the last method
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