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Multiple INSERT statements vs. single INSERT with multiple VALUES
...S clauses and recording the compile time.
I then divided the compile time by the number of rows to get the average compile time per clause. The results are below
Up until 250 VALUES clauses present the compile time / number of clauses has a slight upward trend but nothing too dramatic.
But th...
Extracting bits with a single multiplication
...ion, and clever trick.
Let's look at a simple example of getting a single byte manipulated. Using unsigned 8 bit for simplicity. Imagine your number is xxaxxbxx and you want ab000000.
The solution consisted of two steps: a bit masking, followed by multiplication. The bit mask is a simple AND opera...
Learning assembly [closed]
... how should I start? What kind of assembly should I learn? I want to learn by first doing some easy programs (i.e. a calculator), but the goal itself will be to get accostumed with it so I can understand the code shown, for example, by IDA Pro.
...
Why doesn't java.util.Set have get(int index)?
...t" is NOT the same as a SortedSet - in a SortedSet the elements are sorted by using a Comparator (or using their "natural" ordering).
But instead it is closer to a LinkedHashSet (which others also suggested), or even more so to an (also inexistent) "ArrayListSet", because it guarantees that the ele...
C++ multiline string literal
...est is to just use the fact that adjacent string literals are concatenated by the compiler:
const char *text =
"This text is pretty long, but will be "
"concatenated into just a single string. "
"The disadvantage is that you have to quote "
"each part, and newlines must be literal as "
"u...
prevent property from being serialized in web API
...set; }
[DataMember]
public string Name { get; set; }
//Ignore by default
public List<Something> Somethings { get; set; }
}
For more understanding, you can read the official article.
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Hash collision in git
... before you have reached even a 0.1% chance that you have a collision.
The byte sum of the hashes alone for these commits would be more data than all the data generated on Earth for a year, which is to say you would need to churn out code faster than YouTube streams out video. Good luck with that. :...
index.php not loading by default
...HP. When I visit my site http://example.com/myapp/ , it says "forbidden". By default it's not loading the index.php file.
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dynamically add and remove view to viewpager
...
After figuring out which ViewPager methods are called by ViewPager and which are for other purposes, I came up with a solution. I present it here since I see a lot of people have struggled with this and I didn't see any other relevant answers.
First, here's my adapter; hopefu...
Foreign key constraint may cause cycles or multiple cascade paths?
...mple cases. Fact remains, SQL Server doesn't even try, plays it ultra safe by disallowing more than one path and at least it tells you so.
Microsoft themselves advises the use of triggers instead of FK constraints.
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