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Python/postgres/psycopg2: getting ID of row just inserted
...
cursor.execute("INSERT INTO .... RETURNING id")
id_of_new_row = cursor.fetchone()[0]
And please do not build SQL strings containing values manually. You can (and should!) pass values separately, making it unnecessary to escape and SQL injection impossible:
sql_stri...
How can I decrease the size of Ratingbar?
...tingBar with either ratingBarStyleSmall or a custom style inheriting from Widget.Material.RatingBar.Small (assuming you're using Material Design in your app).
Option 1:
<RatingBar
android:id="@+id/ratingBar"
style="?android:attr/ratingBarStyleSmall"
... />
Option 2:
// styles....
Which annotation should I use: @IdClass or @EmbeddedId
...PI) specification has 2 different ways to specify entity composite keys: @IdClass and @EmbeddedId .
7 Answers
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Default function arguments in Rust
...ng the default value and the function coded only once (instead of in every call), but is of course a whole lot more to type out. The function call will look like add(None, None), which you may or may not like depending on your perspective.
If you see typing nothing in the argument list as the code...
Why is there no Convert.toFloat() method?
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There is - but it's called Convert.ToSingle(). float is a C# alias for the System.Single type.
"Single" is the name for a float in the BCL. "float" is an alias provided by C#. There's a Convert.ToSingle() method, just like there's
Convert.ToInt...
Find all tables containing column with specified name - MS SQL Server
...bleName'
FROM sys.columns c
JOIN sys.tables t ON c.object_id = t.object_id
WHERE c.name LIKE '%MyName%'
ORDER BY TableName
,ColumnName;
Search Tables & Views:
SELECT COLUMN_NAME AS 'ColumnName'
,TABLE_NAME AS 'TableName'
FROM INFO...
Sequence contains no matching element
...hrowing the exception:
var documentRow = _dsACL.Documents.First(o => o.ID == id)
First() will throw an exception if it can't find any matching elements. Given that you're testing for null immediately afterwards, it sounds like you want FirstOrDefault(), which returns the default value for the ...
Database Design for Tagging
...ke it will suit the situation well. However, I'm not convinced it's a good idea to implement bitmap indexing "manually", like digiguru suggests: It sounds like a complicated situation whenever new tags are added(?) But some DBMSes (including Oracle) offer bitmap indexes which may somehow be of use, ...
Is the 'override' keyword just a check for a overridden virtual method?
...s still there, the new one is added just as an overload. In this case, all calls towards the old method will function just as before, without any change in behavior (which would have been the very purpose of the rewriting).
one forgets to declare the method in the superclass as "virtual", but still ...
Click event doesn't work on dynamically generated elements [duplicate]
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The click() binding you're using is called a "direct" binding which will only attach the handler to elements that already exist. It won't get bound to elements created in the future. To do that, you'll have to create a "delegated" binding by using on().
De...