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Ignoring time zones altogether in Rails and PostgreSQL
...n parameter before being displayed to the client.
Example (in psql):
db=# SELECT timestamptz '2012-03-05 20:00+03';
timestamptz
------------------------
2012-03-05 18:00:00+01
What happened here?
I chose an arbitrary time zone offset +3 for the input literal. To Postgres, this is just one o...
How expensive is RTTI?
...me if you can afford to do
if (typeid(a) == typeid(b)) {
B* ba = static_cast<B*>(&a);
etc;
}
instead of
B* ba = dynamic_cast<B*>(&a);
if (ba) {
etc;
}
The former involves only one comparison of std::type_info; the latter necessarily involves traversing an inheritance...
How to Join to first row
...
SELECT Orders.OrderNumber, LineItems.Quantity, LineItems.Description
FROM Orders
JOIN LineItems
ON LineItems.LineItemGUID =
(
SELECT TOP 1 LineItemGUID
FROM LineItems
W...
Difference between DirectCast() and CType() in VB.NET
...just gotten into VB.NET. I generally use CType (and CInt, CBool, CStr) for casts because it is fewer characters and was the first way of casting which I was exposed to, but I am aware of DirectCast and TryCast as well.
...
What is the difference between up-casting and down-casting with respect to class variable
What is the difference between up-casting and down-casting with respect to class variable?
10 Answers
...
Why don't Java's +=, -=, *=, /= compound assignment operators require casting?
...valent to E1 = (T)((E1) op (E2)), so that's kind of like implicit down typecasting (down from long to int). Whereas in i = i+j, we have to do it explicitly, ie, provide the (T) part in E1 = ((E1) op (E2)) Isn't it?
– bad_keypoints
Sep 22 '12 at 14:52
...
Is there a Boolean data type in Microsoft SQL Server like there is in MySQL? [duplicate]
...compared using a comparison operator such as =, <> or IS NULL. e.g.
SELECT
a.answer_body
FROM answers AS a
WHERE a.is_accepted = 0;
From a formatting perspective, a bit value is typically displayed as 0 or 1 in client software. When a more user-friendly format is required, and it can't ...
How to automatically convert strongly typed enum into int?
...rted into integer type, while strongly typed enums can not do it without a cast.
11 Answers
...
Pan & Zoom Image
... MouseButtonEventArgs e)
{
image.ReleaseMouseCapture();
}
As for the selection handles for resizing this can be accomplished using an adorner, check out this article for more information.
share
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How to cast an Object to an int
How can I cast an Object to an int in java?
19 Answers
19
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