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Why do x86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?
...benefit of zero extension would actually be required more, so it saves the extra line of code mov rax, 0. By guaranteeing it will always be zero extended to 64 bits, the compilers can work with this axiom in mind whilst in mov rdx, rax, rax only has to wait for its single dependency, meaning it can ...
how to mysqldump remote db from local machine
... a database on a remote server, but the server does not have mysqldump installed. I would like to use the mysqldump on my machine to connect to the remote database and do the dump on my machine.
...
What happens if i return before the end of using statement? Will the dispose be called?
...cked (where types differ):
using (SqlConnection conn = new SqlConnection("string"))
using (SqlCommand comm = new SqlCommand("", conn))
{
}
And also comma-delimited (where types are the same):
using (SqlCommand comm = new SqlCommand("", conn),
SqlCommand comm2 = new SqlCommand("", conn))...
change text of button and disable button in iOS
... states
extension UIButton {
public func setAllStatesTitle(_ newTitle: String){
self.setTitle(newTitle, for: .normal)
self.setTitle(newTitle, for: .selected)
self.setTitle(newTitle, for: .disabled)
}
}
and use:
yourBtn.setAllStatesTitle("btn title")
...
Installation Issue with matplotlib Python [duplicate]
I have issue after installing the matplotlib package unable to import matplotlib.pyplot as plt . Any suggestion will be greatly appreciate.
...
Understanding scala enumerations
...er Value representing the individual elements of the enumeration (it's actually an inner class, but the difference doesn't matter here).
Thus object WeekDay inherits that type member. The line type WeekDay = Value is just a type alias. It is useful, because after you import it elsewhere with import...
Where does gcc look for C and C++ header files?
...stem header.
If you run gcc in verbose mode on such a source, it will list all the system include locations as it looks for the bogus header.
$ echo "#include <bogus.h>" > t.c; gcc -v t.c; rm t.c
[..]
#include "..." search starts here:
#include <...> search starts here:
/usr/local...
Detect HTTP or HTTPS then force HTTPS in JavaScript
...on.protocol !== 'https:') {
location.replace(`https:${location.href.substring(location.protocol.length)}`);
}
location.href = blah adds this redirect to the browser history. If the user hits the back button, they will be redirected back to the the same page. It is better to use location.replac...
Simple conversion between java.util.Date and XMLGregorianCalendar
...hal(Object dt) throws Exception {
return new DateTime((Date) dt).toString("YYYY-MM-dd");
}
@Override
public Object unmarshal(Object s) throws Exception {
return DatatypeConverter.parseDate((String) s).getTime();
}
}
In the xsd, I have followed the excellent r...
How to detect user inactivity in Android
...
Selects Session Timeout to be 5 mins.
Does some operations on the app. (all in foreground)
Now User bring Myapp to background and starts some other app.
----> Count down timer starts and logs out user after 5 mins
OR user turns the screen OFF.
----> Count down timer starts and logs ou...