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What does jquery $ actually return?
...you should pass the function, I don't see any information on what it actually returns .
9 Answers
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What is the difference between persist() and merge() in JPA and Hibernate?
...these
other entities are annotated with the
cascade=PERSIST or cascade=ALL
annotation element value or specified
with the equivalent XML descriptor
element.
If X is a removed entity,
it becomes managed.
If X is a
detached object, the
EntityExistsException may be thrown
when the...
Make div stay at bottom of page's content all the time even when there are scrollbars
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@aroth that is because they are two totally different solutions. This solution will keep the footer at the bottom of the visual area of the screen at all times. The alternative solution keeps the footer at either the bottom of the screen or the bottom of the page,...
How is set() implemented?
...ts in python have O(1) membership-checking. How are they implemented internally to allow this? What sort of data structure does it use? What other implications does that implementation have?
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How can I get pg_dump to authenticate properly
...ing host variable PGPASSWORD and .pgpass and neither of these two will allow me to authenticate to the database. I have chmod 'd .pgpass to appropriate permissions and also tried:
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What is a Context Free Grammar?
...y and then the Wikipedia entry on formal grammar, I am left utterly and totally befuddled. Would someone be so kind as to explain what these things are?
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AngularJS - wait for multiple resource queries to complete
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You'll want to use promises and $q.all().
Basically, you can use it to wrap all of your $resource or $http calls because they return promises.
function doQuery(type) {
var d = $q.defer();
var result = Account.query({ type: type }, function() {
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What is the difference between ArrayList.clear() and ArrayList.removeAll()?
...st is defined as ArrayList<String> arraylist , is arraylist.removeAll(arraylist) equivalent to arraylist.clear() ?
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Thread pooling in C++11
... code, that would violate my job integrity.
Edit: to terminate the pool, call the shutdown() method:
XXXX::shutdown(){
{
unique_lock<mutex> lock(threadpool_mutex);
terminate_pool = true;} // use this flag in condition.wait
condition.notify_all(); // wake up all threads.
// ...
Deleting Files using Git/GitHub
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@KimPrince - According to kernel.org, "-A --all Like -u, but match <filepattern> against files in the working tree in addition to the index. That means that it will find new files as well as staging modified content and removing files that are no longer in the wo...