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ERROR 1452: Cannot add or update a child row: a foreign key constraint fails
...2. Cannot add or update a child row: a foreign key constraint fails essentially means that, you are trying to add a row to your Ordrelinje table for which no matching row (OrderID) is present in Ordre table.
You must first insert the row to your Ordre table.
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Archives not showing up in Organizer for Xcode 4
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EDIT (Incorporated all comments to a single answer)
Try one of the following (or all)
Instead of using Build For -> Archive, in the product menu just use archive. It will show up then.
In the scheme editor, edit the scheme and go to the A...
Why do C and C++ compilers allow array lengths in function signatures when they're never enforced?
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It is a quirk of the syntax for passing arrays to functions.
Actually it is not possible to pass an array in C. If you write syntax that looks like it should pass the array, what actually happens is that a pointer to the first element of the array is passed instead.
Since the pointer does...
How can I add an item to a IEnumerable collection?
...s can be added. In fact, it does not necessarily represent a collection at all! For example:
IEnumerable<string> ReadLines()
{
string s;
do
{
s = Console.ReadLine();
yield return s;
} while (!string.IsNullOrEmpty(s));
}
IEnumerable<string> lines ...
How do I find files that do not contain a given string pattern?
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Take a look at ack. It does the .svn exclusion for you automatically, gives you Perl regular expressions, and is a simple download of a single Perl program.
The equivalent of what you're looking for should be, in ack:
ack -L foo
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Weird Integer boxing in Java
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The true line is actually guaranteed by the language specification. From section 5.1.7:
If the value p being boxed is true,
false, a byte, a char in the range
\u0000 to \u007f, or an int or short
number between -128 and 127, then let
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Large Object Heap Fragmentation
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The CLR uses the LOH to preallocate a few objects (such as the array used for interned strings). Some of these are less than 85000 bytes and thus would not normally be allocated on the LOH.
It is an implementation detail, but I assume the reason for ...
Can I recover a branch after its deletion in Git?
... sha of the commit found using a command like that (it creates a file with all the dangling commits):
git fsck --full --no-reflogs --unreachable --lost-found | grep commit | cut -d\ -f3 | xargs -n 1 git log -n 1 --pretty=oneline > .git/lost-found.txt
If you should use it more than one time ...
When is finally run if you throw an exception from the catch block?
In the above block when is the finally block called? Before the throwing of e or is finally called and then catch?
7 Answer...
What does PermGen actually stand for?
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"In JDK 7, interned strings are no longer allocated in the permanent generation of the Java heap": oracle.com/technetwork/java/javase/jdk7-relnotes-418459.html
– almalkawi
Dec 20 '13 at 18:41
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