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Computed / calculated / virtual / derived columns in PostgreSQL
...(Not in Postgres 13, yet) .
Related:
Attribute notation for function call gives error
Until then, you can emulate VIRTUAL generated columns with a function using attribute notation (tbl.col) that looks and works much like a virtual generated column. That's a bit of a syntax oddity which exi...
Flushing footer to bottom of the page, twitter bootstrap
I am generally familiar with the technique of flushing a footer using css.
34 Answers
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Text overflow ellipsis on two lines
...lt;div class="ellipsis">
<div>
<p>
Call me Ishmael. Some years ago – never mind how long precisely – having
little or no money in my purse, and nothing particular to interest me on
shore, I thought I would sail about a little and see...
jQuery: Selecting by class and input type
...ass")
And it will also work properly. In my humble opinion this syntax really looks rather ugly, as most of the time I expect : style selectors to come last. As I said, though, either one will work.
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What's a good way to overwrite DateTime.Now during testing?
...
My preference is to have classes that use time actually rely on an interface, such as
interface IClock
{
DateTime Now { get; }
}
With a concrete implementation
class SystemClock: IClock
{
DateTime Now { get { return DateTime.Now; } }
}
Then if you want, you ca...
Why Response.Redirect causes System.Threading.ThreadAbortException?
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The correct pattern is to call the Redirect overload with endResponse=false and make a call to tell the IIS pipeline that it should advance directly to the EndRequest stage once you return control:
Response.Redirect(url, false);
Context.ApplicationIns...
Bytes of a string in Java
...re interested in for your case, as the argument to getBytes(). And don't fall into the trap of assuming that UTF-8 represents every character as a single byte, as that's not true either:
final String interesting = "\uF93D\uF936\uF949\uF942"; // Chinese ideograms
// Check length, in characters
Sys...
Casting interfaces for deserialization in JSON.NET
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This is not fine at all. The point of using interfaces is to use dependency injection, but doing this with an object typed parameter required by your constructor you totally screw up the point of having an interface as a property.
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In Scala, what exactly does 'val a: A = _' (underscore) mean?
....0d if T is Double,
false if T is Boolean,
() if T is Unit,
null for all other types T.
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What is the difference between window, screen, and document in Javascript?
...t model. You can access it as window
window.screen or just screen is a small information object about physical screen dimensions.
window.document or just document is the main object of the potentially visible (or better yet: rendered) document object model/DOM.
Since window is the global object ...