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How does JPA orphanRemoval=true differ from the ON DELETE CASCADE DML clause
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orphanRemoval has nothing to do with ON DELETE CASCADE.
orphanRemoval is an entirely ORM-specific thing. It marks "child" entity to be removed when it's no longer referenced from the "parent" entity, e.g. when you remove the child entity from the corres...
jQuery: select all elements of a given class, except for a particular Id
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Use the :not selector.
$(".thisclass:not(#thisid)").doAction();
If you have multiple ids or selectors just use the comma delimiter, in addition:
(".thisclass:not(#thisid,#thatid)").doAction();
share...
JRE 1.7 - java version - returns: java/lang/NoClassDefFoundError: java/lang/Object
...n unpack200 on all .pack files in the JRE's lib/ and lib/ext/ folders.
Windows
To unpack one .pack file (for example rt.pack), run:
"%JAVA_HOME%\bin\unpack200" -r -v rt.pack rt.jar
To recursively unpack all .pack files, from the JRE root run:
for /r %f in (*.pack) do "%JAVA_HOME%\bin\unpack200...
How to declare Return Types for Functions in TypeScript
I checked here https://github.com/Microsoft/TypeScript/blob/master/doc/spec.md which is the TypeScript Language Specifications but I couldn't see one thing that how I can declare a return type of the function. I showed what I was expecting in the code below : greet(name:string) :string {}
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List comprehension vs. lambda + filter
...da, but use whichever you find easier.
There are two things that may slow down your use of filter.
The first is the function call overhead: as soon as you use a Python function (whether created by def or lambda) it is likely that filter will be slower than the list comprehension. It almost certain...
Test if a command outputs an empty string
...hat, but see rsp's answer for a better solution.
Empty output
Commands don’t return values – they output them. You can capture this output by using command substitution; e.g. $(ls -A). You can test for a non-empty string in Bash like this:
if [[ $(ls -A) ]]; then
echo "there are files"
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Why are unnamed namespaces used and what are their benefits?
...us namespace can also improve performance. As symbols within the namespace do not need any external linkage, the compiler is freer to perform aggressive optimization of the code within the namespace. For example, a function which is called multiple times once in a loop can be inlined without any imp...
How can I remove a flag in C?
...s a variable that holds some flags and I want to remove one of them. But I don't know how to remove it.
3 Answers
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How to use the TextWatcher class in Android?
...tChanged(CharSequence s, int start, int before, int count) {
// TODO Auto-generated method stub
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
// TODO Auto-generated method stub
}
@Override
public void afterTex...
Convert generic List/Enumerable to DataTable?
... to restrict it to particular members (or enforce the order), then you can do that too:
IEnumerable<SomeType> data = ...
DataTable table = new DataTable();
using(var reader = ObjectReader.Create(data, "Id", "Name", "Description")) {
table.Load(reader);
}
Editor's Dis/claimer: FastMember i...