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iPhone: How to get current milliseconds?
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In order to avoid getting negative numbers I had to cast before the math: int64_t result = ((int64_t)tv.tv_sec * 1000) + ((int64_t)tv.tv_usec / 1000);
– jason gilbert
Jan 18 '15 at 1:48
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what is .netrwhist?
..., in case you want vim to respect the XDG base directory specifications in order to prevent your home folder from being littered up by dotfiles like ~/.vim, you may want to split cached files and history files from your configuration (which usually resides in the runtime path). So for example, to st...
Quickly find whether a value is present in a C array?
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Keep the table in sorted order, and use Bentley's unrolled binary search:
i = 0;
if (key >= a[i+512]) i += 512;
if (key >= a[i+256]) i += 256;
if (key >= a[i+128]) i += 128;
if (key >= a[i+ 64]) i += 64;
if (key >= a[i+ 32]) i += 32...
Initializing a static std::map in C++
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No, the danger is that there is nothing saying in which order the static variables should be initialized (at least across compilation units). But this is not a problem linked to this question. This is a general problem with static variables.
– PierreBdR
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Way to go from recursion to iteration
... you have more than one recursive call inside and you want to preserve the order of the calls, you have to add them in the reverse order to the stack:
foo(first);
foo(second);
has to be replaced by
stack.push(second);
stack.push(first);
Edit: The article Stacks and Recursion Elimination (or Articl...
What are the most interesting equivalences arising from the Curry-Howard Isomorphism?
...ctions must be total, e.g., all pattern matching must be exhaustive. So in order to write a function with no patterns, the parameter type must have no constructors, e.g., be uninhabited. Therefore, such a function would be legal--and thus its own type inhabited--precisely and only when its argument ...
Python's many ways of string formatting — are the older ones (going to be) deprecated?
...rase was removed later, in commit Close #4966: revamp the sequence docs in order to better explain the state of modern Python. This might seem like a sign that a plan to deprecate % formatting was back on the cards... but diving into the bug tracker reveals that the intent was the opposite. On the b...
Why return NotImplemented instead of raising NotImplementedError
...otImplemented, interpreter runs the Reflection Function but on the flipped order of input arguments.
You can find detailed examples here
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What is the largest Safe UDP Packet Size on the Internet
...s inside of another protocol such as IPsec (used for VPNs and the like) in order to route the packet to its destination. So if you do not know the MTU on your particular network path, it is best to leave a reasonable margin for other header information that you may not have anticipated. A 512-byte...
How do I shuffle an array in Swift?
...if my array consists of 52 playing cards, I want to shuffle the array in order to shuffle the deck.
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