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Computed / calculated / virtual / derived columns in PostgreSQL
...computed columns" of SQL Server.
STORED generated columns are introduced with Postgres 12. Trivial example:
CREATE TABLE tbl (
int1 int
, int2 int
, product bigint GENERATED ALWAYS AS (int1 * int2) STORED
);
db<>fiddle here
VIRTUAL generated columns may come with one of the next i...
Text overflow ellipsis on two lines
I know you can use a combination of CSS rules to make text end with ellipsis (...) when it's time to overflow (get out of parent's bounds).
...
change type of input field with jQuery
This is supposed to change the #password input field (with id="password" ) that is of type password to a normal text field, and then fill in the text “Password”.
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JavaScript moving element in the DOM
Let's say I have three <div> elements on a page. How can I swap positions of the first and third <div> ? jQuery is fine.
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Get nodes where child node contains an attribute
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Try
//book[title/@lang = 'it']
This reads:
get all book elements
that have at least one title
which has an attribute lang
with a value of "it"
You may find this helpful — it's an article entitled "XPath in Five Paragraph...
How can I fill a div with an image while keeping it proportional?
...
.fill {
display: flex;
justify-content: center;
align-items: center;
overflow: hidden
}
.fill img {
flex-shrink: 0;
min-width: 100%;
min-height: 100%
}
<div class="fill">
<img src="https://lorempizza.com/320/240" alt="" />
</div>
...
ASP.NET Temporary files cleanup
...
Yes, it's safe to delete these, although it may force a dynamic recompilation of any .NET applications you run on the server.
For background, see the Understanding ASP.NET dynamic compilation article on MSDN.
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How can I reliably get an object's address when operator& is overloaded?
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Let us first copy the code from Boost, minus the compiler work around bits:
template<class T>
struct addr_impl_ref
{
T & v_;
inline addr_impl_ref( T & v ): v_( v ) {}
inline operator T& () const { return v_; }
private:
addr_impl_ref & operator=(const addr_impl_re...
Cropping an UIImage
...ve mentioned, this method doesn't take rotation into account; read some additional answers and spread some upvote love around to keep the responses to this question helpful for everyone.
Original response:
I'm going to copy/paste my response to the same question elsewhere:
There isn't a simple cl...
Static Vs. Dynamic Binding in Java
I'm currently doing an assignment for one of my classes, and in it, I have to give examples, using Java syntax, of static and dynamic binding .
...