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Given an array of numbers, return array of products of all other numbers (no division)
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Here is a small recursive function (in C++) to do the modofication in place. It requires O(n) extra space (on stack) though. Assuming the array is in a and N holds the array length, we have
int multiply(int *a, int fwdProduct, int indx)...
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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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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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 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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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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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.
// ...
Git push existing repo to a new and different remote repo server?
... the more "official" repo on fedorahosted.
What would be the steps to initially copy that over?
Within github there is this nice "fork" button, but I can't use this for obvious reasons.
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Why does Double.NaN==Double.NaN return false?
...enormalized value or a signed zero, and an operation that has no mathematically definite result produces NaN. All numeric operations with NaN as an operand produce NaN as a result. As has already been described, NaN is unordered, so a numeric comparison operation involving one or two NaNs returns fa...