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undefined reference to boost::system::system_category() when compiling
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The boost library you are using depends on the boost_system library. (Not all of them do.)
Assuming you use gcc, try adding -lboost_system to your compiler command line in order to link against that library.
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Use of undeclared identifier 'kUTTypeMovie'
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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targetContentOffsetForProposedContentOffset:withScrollingVelocity without subclassing UICollectionVi
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Here's my implementation in Swift 5 for vertical cell-based paging:
override func targetContentOffset(forProposedContentOffset proposedContentOffset: CGPoint, withScrollingVelocity velocity: CGPoint) -> CGPoint {
guard let collectionView = self.collectionView else {
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Fastest way to get the first object from a queryset in django?
...ust do the above and it will only pull the first. You could even use .order_by() to ensure you get the first you want.
Be sure to add the .get() or else you will get a QuerySet back and not an object.
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How well is Unicode supported in C++11?
... what std::string and its siblings should do:
The class template basic_string describes objects that can store a sequence consisting of a varying number of arbitrary char-like objects with the first element of the sequence at position zero.
Well, std::string does that just fine. Does that pro...
Convert a Scala list to a tuple?
... I know of, but it's easy enough to make your own, e.g. case class Vec3[A](_1: A, _2: A, _3: A)
– Tom Crockett
Sep 16 '14 at 6:43
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Fastest way to list all primes below N
...on.
Below is a script which compares a number of implementations:
ambi_sieve_plain,
rwh_primes,
rwh_primes1,
rwh_primes2,
sieveOfAtkin,
sieveOfEratosthenes,
sundaram3,
sieve_wheel_30,
ambi_sieve (requires numpy)
primesfrom3to (requires numpy)
primesfrom2to (requires numpy)
Many thanks to...
How disable Copy, Cut, Select, Select All in UITextView
... your /, file where you need this behaviour.
– markus_p
Apr 3 '12 at 10:07
4
This only works as a...
How to access app.config in a blueprint?
...horisation.py which in a package api. I am initializing the blueprint in __init__.py which is used in authorisation.py .
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How to use PyCharm to debug Scrapy projects
... a virtualenv with Python 3.5.0 and setting the "script" parameter to /path_to_project_env/env/bin/scrapy solved the issue for me.
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