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What is the difference between require() and library()?
What is the difference between require() and library() ?
8 Answers
8
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Do unix timestamps change across timezones?
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The definition of UNIX timestamp is timezone independent. The timestamp is the number of seconds (or milliseconds) elapsed since an absolute point in time, midnight of Jan 1 1970 in UTC time. (UTC is Greenwich Mean Time without Daylight Savings time adjustme...
Why is it important to override GetHashCode when Equals method is overridden?
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Yes, it is important if your item will be used as a key in a dictionary, or HashSet<T>, etc - since this is used (in the absence of a custom IEqualityComparer<T>) to group items into buckets. If the hash-code for two item...
Git and Mercurial - Compare and Contrast
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Disclaimer: I use Git, follow Git development on git mailing list, and even contribute a bit to Git (gitweb mainly). I know Mercurial from documentation and some from discussion on #revctrl IRC channel on FreeNode.
Thanks to a...
What is the correct answer for cout
...std::operator<<(std::cout, a++) or after. So the result of the above is undefined.
C++17 update
In C++17 the rules have been updated. In particular:
In a shift operator expression E1<<E2 and E1>>E2, every value computation and side-effect of E1 is sequenced before every val...
mmap() vs. reading blocks
...on Linux and I came across a nice post (link) on the Linux kernel mailing list. It's from 2000, so there have been many improvements to IO and virtual memory in the kernel since then, but it nicely explains the reason why mmap or read might be faster or slower.
A call to mmap has more overhead th...
Check orientation on Android phone
How can I check if the Android phone is in Landscape or Portrait?
23 Answers
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What is __future__ in Python used for and how/when to use it, and how it works
...requently appears in Python modules. I do not understand what __future__ is for and how/when to use it even after reading the Python's __future__ doc .
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What is the difference between List (of T) and Collection(of T)?
...the same ways, and I am worried I'm about to go down a path in design that is irreversible if I don't understand this better. Also, I am using .NET.
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When should static_cast, dynamic_cast, const_cast and reinterpret_cast be used?
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static_cast is the first cast you should attempt to use. It does things like implicit conversions between types (such as int to float, or pointer to void*), and it can also call explicit conversion functions (or implicit ones). In many c...