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How to get the mouse position without events (without moving the mouse)?
... just thought of a way. Overlay your page with a div that covers the whole document. Inside that, create (say) 2,000 x 2,000 <a> elements (so that the :hover pseudo-class will work in IE 6, see), each 1 pixel in size. Create a CSS :hover rule for those <a> elements that changes a propert...
In the shell, what does “ 2>&1 ” mean?
In a Unix shell, if I want to combine stderr and stdout into the stdout stream for further manipulation, I can append the following on the end of my command:
...
List columns with indexes in PostgreSQL
...
@Qwery, see the documentation for pg_class r = ordinary table, i = index, S = sequence, v = view, c = composite type, t = TOAST table.
– cope360
Jan 29 '15 at 13:35
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Should the .gradle folder be added to version control?
...ored.
Why should I ignore it?
It's purely for caching information, you don't want it in your repo because:
it can get big and be full of binary files
there can be machine specific data in there
there's a lot of churn in there (you'd be constantly committing changes to files in there)
everythi...
Reflecting parameter name: abuse of C# lambda expressions or syntax brilliance?
...
You don't. This strategy is simply non-portable. (In case it helps, as an example the other way, F# could be capable of overloading methods that differ only in return type (type inference can do that). This can be expressed in...
How to compare two NSDates: Which is more recent?
...e {
NSLog(@"dates are the same");
}
Please refer to the NSDate class documentation for more details.
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How can I make a JPA OneToOne relation lazy
...etailed explanation.
many-to-one associations (and one-to-many, obviously) do not suffer from this issue. Owner entity can easily check its own FK (and in case of one-to-many, empty collection proxy is created initially and populated on demand), so the association can be lazy.
Replacing one-to-one w...
What is the main difference between Inheritance and Polymorphism?
...nding if you have a Person or a Student. It gets a bit tricky, but if you do something like
Person p = new Student();
p.read();
the read method on Student gets called. Thats the polymorphism in action. You can do that assignment because a Student is a Person, but the runtime is smart enough to...
Managing constructors with many parameters in Java
... projects, there's an class hierarchy that adds more parameters as it goes down the chain. At the bottom, some of the classes can have up to 30 parameters, 28 of which are just being passed into the super constructor.
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Clearing using jQuery
... other types of form elements, with the exception of type="hidden".
window.reset = function(e) {
e.wrap('<form>').closest('form').get(0).reset();
e.unwrap();
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<form>
<inp...