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What is the simplest and most robust way to get the user's current location on Android?
...work.
One more approach is to use LocationClient http://developer.android.com/training/location/retrieve-current.html. But it requires Google Play Services apk to be installed on user device.
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Why is it bad practice to call System.gc()?
...c() , I was told it's bad practice to call System.gc() manually, but the comments were not entirely convincing. In addition, no one seemed to dare to upvote, nor downvote my answer.
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What is std::promise?
...fairly familiar with C++11's std::thread , std::async and std::future components (e.g. see this answer ), which are straight-forward.
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When to use LinkedList over ArrayList in Java?
...steps) for worst case, whereas in an ArrayList the desired position can be computed mathematically and accessed in O(1).
Another benefit of using a LinkedList arise when you add or remove from the head of the list, since those operations are O(1), while they are O(n) for ArrayList. Note that ArrayD...
O(nlogn) Algorithm - Find three evenly spaced ones within binary string
...figure that most of the class didn't solve it correctly, because I haven't come up with a solution in the past 24 hours.
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JavaScript hashmap equivalent
... of the object, e.g., a key, or a set of keys, which are already unique, a combination of keys, which are unique together, or as complex as using some cryptographic hashes like in DojoX encoding, or DojoX UUID. While the latter solutions may produce unique keys, personally I try to avoid them at all...
Compile time string hashing
...rent places that using C++11's new string literals it might be possible to compute a string's hash at compile time. However, no one seems to be ready to come out and say that it will be possible or how it would be done.
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How efficient is locking an unlocked mutex? What is the cost of a mutex?
...some systems cheap/fast syscalls are used to implement the mutexes, they become slow (normal) system calls only in case of contention.)
Locking unlocked mutex is really cheap. Unlocking mutex w/o contention is cheap too.
How much does a mutex cost? Is it a problem to have really a lot of mutexe...
Is there a MySQL option/feature to track history of changes to records?
...ld vs new is available and the date this took place. Is there a feature or common technique to do this?
8 Answers
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Is gcc's __attribute__((packed)) / #pragma pack unsafe?
In C, the compiler will lay out members of a struct in the order in which they're declared, with possible padding bytes inserted between members, or after the last member, to ensure that each member is aligned properly.
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