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When to use Common Table Expression (CTE)
...n I need the same CTE more than once, I feed it into a temporary table and then use the temporary table as much as I want.
– Fandango68
Jan 27 '16 at 5:32
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Why can't the C# constructor infer type?
...structor can't support type inference?
No. When you have
new Foo(bar)
then we could identify all types called Foo in scope regardless of generic arity, and then do overload resolution on each using a modified method type inference algorithm. We'd then have to create a 'betterness' algorithm tha...
How to fix “Headers already sent” error in PHP
...nd all the output
it wants. But sending further HTTP headers is impossible then.
How can you find out where the premature output occured?
The header() warning contains all relevant information to
locate the problem cause:
Warning: Cannot modify header information - headers already sent by
(o...
Why are Subjects not recommended in .NET Reactive Extensions?
... on the problem. Hack in a subject, poke it here there and everywhere, and then let the poor support dev guess at WTF was going on. When you use the Create/Generate etc methods you are localizing the effects on the sequence. You can see it all in one method and you know no-one else is throwing in a ...
onKeyPress Vs. onKeyUp and onKeyDown
....
So it seems that the browser (Firefox 43) erases the user's selection, then fires the keypress event, then updates the fields contents, then fires keyup.
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Returning multiple objects in an R function [duplicate]
...lt;- c("a", "b", "e")
newList <- list("integer" = foo, "names" = bar)
Then return this list.
After calling your function, you can then access each of these with newList$integer or newList$names.
Other object types might work better for various purposes, but the list object is a good way to...
How to get active user's UserDetails
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Preamble: Since Spring-Security 3.2 there is a nice annotation @AuthenticationPrincipal described at the end of this answer. This is the best way to go when you use Spring-Security >= 3.2.
When you:
use an older version of Spring-Security,
need to load your custom User Object from the...
How to install Boost on Ubuntu
...bboost-all-dev
Boost's bootstrap setup:
./bootstrap.sh --prefix=/usr/
Then build it with:
./b2
and eventually install it:
sudo ./b2 install
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Algorithm to compare two images
...rform better than random guessing, otherwise it is useless to us!
You can then apply your software into the real world in a controlled way and start to analyse the results it produces. This is the sort of software project which can go on for infinitum, there are always tweaks and improvements you ...
How does the SQL injection from the “Bobby Tables” XKCD comic work?
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@PhiLho: If the original statement were an INSERT, then the parenthesis would make more sense. It would also explain why the database connection isn't in read-only mode.
– dan04
Aug 10 '10 at 4:02
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