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~x + ~y == ~(x + y) is always false?
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Assume for the sake of contradiction that there exists some x and some y (mod 2n) such that
~(x+y) == ~x + ~y
By two's complement*, we know that,
-x == ~x + 1
<==> -1 == ~x + x
Noting this result, we have,
~(x+y) == ~x + ~y
<==> ~(x+y) + (x+y) == ~x + ~y...
Python's equivalent of && (logical-and) in an if-statement
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You would want and instead of &&.
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What's the equivalent of use-commit-times for git?
I need the timestamps of files on my local and on my server to be in sync. This is accomplished with Subversion by setting use-commit-times=true in the config so that the last modified of each file is when it was committed.
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Move entire line up and down in Vim
...++, I can use Ctrl + Shift + Up / Down to move the current line up and down. Is there a similar command to this in Vim? I have looked through endless guides, but have found nothing.
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How does a hash table work?
... in layman's terms.
Let's assume you want to fill up a library with books and not just stuff them in there, but you want to be able to easily find them again when you need them.
So, you decide that if the person that wants to read a book knows the title of the book and the exact title to boot, the...
`testl` eax against eax?
I am trying to understand some assembly.
8 Answers
8
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CROSS JOIN vs INNER JOIN in SQL
What is the difference between CROSS JOIN and INNER JOIN ?
12 Answers
12
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Optional Parameters with C++ Macros
...s the list of arguments twice, first to form the name of the helper macro, and then to pass the arguments to that helper macro. It uses a standard trick to count the number of arguments to a macro.
enum
{
plain = 0,
bold = 1,
italic = 2
};
void PrintString(const char* message, int siz...
The static keyword and its various uses in C++
...tatic is one which has several meanings in C++ that I find very confusing and I can never bend my mind around how its actually supposed to work.
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How do I convert an integer to binary in JavaScript?
...nswered Apr 22 '13 at 19:43
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