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Is it safe to use -1 to set all bits to true?
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why is -1 guaranteed to be converted to all ones? Is that guaranteed by the standard?
– jalf
Apr 30 '09 at 22:11
9
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What happens when a computer program runs?
...lso note, these aren't actual lines of C code executing. The compiler has converted them into machine language instructions in your executable. They are then (generally) copied from the TEXT area into the CPU pipeline, then into the CPU registers, and executed from there. [This was incorrect. Se...
Is the practice of returning a C++ reference variable evil?
...const&", what actually happens is that the return statement implicitly converts the temp, which is of type T, to type "T const&" as per 6.6.3.2 (a legal conversion but one which does not extend lifetime), and then the calling code initialises the ref of type "T const&" with the function'...
Fast way to get image dimensions (not filesize)
...ng 20-60 KB read by "identify" for 5-335 MB images (I also tested against "convert" which showed all bytes being read). So it looks like "identify" is a good choice here (since it supports all popular formats and reads just the header).
– coderforlife
Feb 12 '1...
What is a JavaBean exactly?
...s to (and implies that it is capable of) "serialization" -- a process that converts an instance into a stream of bytes. Those bytes can be stored in files, sent over a network connection, etc, and have enough info to allow a JVM (at least, one that knows about the object's type) to reconstruct the ...
Why does this assert throw a format exception when comparing structures?
...e expected and actual values themselves end up with braces in, after being converted to a string - which they do for Size. For example, your first size ends up being converted to:
{Width=0, Height=0}
So the second level of formatting is something like:
string.Format("Expected: {Width=0, Height=0...
How to get UTC time in Python?
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What's the point of converting to a string and then back to a number when you can get the number directly?
– Mark Ransom
Mar 21 '17 at 18:09
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T-SQL datetime rounded to nearest minute and nearest hours with using functions
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DECLARE @date As DateTime2
SET @date = '2007-09-22 15:07:38.850'
SELECT CONVERT(VARCHAR(16), @date, 120) --2007-09-22 15:07
SELECT CONVERT(VARCHAR(13), @date, 120) --2007-09-22 15
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Java ArrayList how to add elements at the beginning
...optimized for adding elements at the first index. Mind though, that if you convert your collection to one of these, the conversation will probably need a time and space complexity of O(n)
Deque
The JDK includes the Deque structure which offers methods like addFirst(e) and offerFirst(e)
Deque<...
What is a lambda (function)?
...ow.FieldName > 15 );
LinqToSql can read that function (x > 15) and convert it to the actual SQL to execute using expression trees.
The statement above becomes:
select ... from [tablename]
where [FieldName] > 15 --this line was 'read' from the lambda function
This is different fr...