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How can I convert this foreach code to Parallel.ForEach?
... Just wanted to point it out (more for the OP) so that there wasn't a misguided thought that it only works on List<T> ;)
– Reed Copsey
Sep 3 '12 at 17:21
1
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How to determine if a record is just created or updated in after_save
...king to use this for an after_save callback.
A simpler solution is to use id_changed? (since it won't change on update) or even created_at_changed? if timestamp columns are present.
Update: As @mitsy points out, if this check is needed outside of callbacks then use id_previously_changed?. See docs...
Run a Docker image as a container
... tag/name or not.
$ docker images
REPOSITORY TAG ID CREATED SIZE
ubuntu 12.04 8dbd9e392a96 4 months ago 131.5 MB (virtual 131.5 MB)
With a name (let's use Ubuntu):
$ docker run -i -t ubuntu:12.04 /bin/...
How to drop column with constraint?
....default_constraints dc
JOIN sys.columns c
ON c.default_object_id = dc.object_id
WHERE
dc.parent_object_id = OBJECT_ID('tbloffers')
AND c.name = N'checkin'
IF @@ROWCOUNT = 0 BREAK
EXEC (@sql)
END
...
How do I get jQuery to select elements with a . (period) in their ID?
...data);
});
});
});
Also check out How do I select an element by an ID that has characters used in CSS notation? on the jQuery FAQ.
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When to use single quotes, double quotes, and backticks in MySQL
...
Backticks are to be used for table and column identifiers, but are only necessary when the identifier is a MySQL reserved keyword, or when the identifier contains whitespace characters or characters beyond a limited set (see below) It is often recommended to avoid using ...
Which annotation should I use: @IdClass or @EmbeddedId
...PI) specification has 2 different ways to specify entity composite keys: @IdClass and @EmbeddedId .
7 Answers
...
MySQL Update Inner Join tables query
I have no idea what the problem is. Using MySQL 5.0 I get a compile error when attempting to run the following MySQL update query:
...
remove objects from array by object property
... i++) {
var obj = arrayOfObjects[i];
if (listToDelete.indexOf(obj.id) !== -1) {
arrayOfObjects.splice(i, 1);
}
}
All you need to do to fix the bug is decrement i for the next time around, then (and looping backwards is also an option):
for (var i = 0; i < arrayOfObjects.le...
What is SYSNAME data type in SQL Server?
...bject names. The exact definition of
sysname is related to the rules for identifiers. Therefore, it can
vary between instances of SQL Server. sysname is functionally the same
as nvarchar(128) except that, by default, sysname is NOT NULL. In
earlier versions of SQL Server, sysname is defined ...