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On Duplicate Key Update same as insert
...UPLICATE KEY
UPDATE a=a, b=b, c=c, d=d, e=e, f=f, g=g;
To get the id from LAST_INSERT_ID; you need to specify the backend app you're using for the same.
For LuaSQL, a conn:getlastautoid() fetches the value.
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How do I raise a Response Forbidden in django
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Return it from the view as you would any other response.
from django.http import HttpResponseForbidden
return HttpResponseForbidden()
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Why is this program erroneously rejected by three C++ compilers?
...ce the error. It is entirely possible that your compiler support a mapping from image to basic source character set, but is not required to.
Since this mapping is implementation-defined, you'll need to look at your implementations documentation to see the file formats it supports. Typically, every...
Case-insensitive search
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Yeah, use .match, rather than .search. The result from the .match call will return the actual string that was matched itself, but it can still be used as a boolean value.
var string = "Stackoverflow is the BEST";
var result = string.match(/best/i);
// result == 'BEST';
if ...
Long vs Integer, long vs int, what to use and when?
...d use long and int, except where you need to make use of methods inherited from Object, such as hashcode. Java.util.collections methods usually use the boxed (Object-wrapped) versions, because they need to work for any Object, and a primitive type, like int or long, is not an Object.
Another differ...
How do I use a PriorityQueue?
... inserts an element if possible, otherwise returning
false. This differs from the Collection.add method, which can fail to
add an element only by throwing an unchecked exception. The offer
method is designed for use when failure is a normal, rather than
exceptional occurrence, for example, i...
C++ static virtual members?
...you use the class instead of an object, it would naturally use the version from that class, instead of doing virtual-dispatch. Nothing new there.
– Deduplicator
Feb 2 '15 at 22:17
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Python Empty Generator Function
... Python 3.3 and above (as suggested by DSM), this:
def empty():
yield from ()
The presence of the yield keyword makes it clear at the briefest glance that this is just another generator function, exactly like all the others. It takes a bit more time to see that the iter(()) version is doing t...
How to change my Git username in terminal?
I was pushing and pulling from git in Terminal then I changed my username on github.com. I went to push some changes and it couldn't push because it was still recognizing my old username.. How do I change/update my username on git in terminal?
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How do CDI and EJB compare? interact?
...ations (Glassfish, JBoss AS, Websphere, etc).
EJB3 beans were retrofitted from the old legacy EJB2 component model* and were the first beans in Java EE to be managed beans via an annotation. EJB3 beans feature dependency injection, declarative transactions, declarative security, pooling, concurren...