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urlencode vs rawurlencode?
...characters except -_.~ have been replaced with a percent (%) sign followed by two hex digits. This is the encoding described in » RFC 3986 for protecting literal characters from being interpreted as special URL delimiters, and for protecting URLs from being mangled by transmission media with charac...
C# switch statement limitations - why?
...t time branch using a jump table. However, in sparse cases as pointed out by Ivan Hamilton the compiler may generate something else entirely.
This is actually quite easy to verify by writing various C# switch statements, some sparse, some dense, and looking at the resulting CIL with the ildasm.exe...
Finding quaternion representing the rotation from one vector to another
...heta) * perpendicular.z
Seeing as a rotation from u to v can be achieved by rotating by theta (the angle between the vectors) around the perpendicular vector, it looks as though we can directly construct a quaternion representing such a rotation from the results of the dot and cross products; howe...
What is the theoretical maximum number of open TCP connections that a modern Linux box can have
...hich limits the maximum number of file descriptors for a process. That is by default a lot less than 300K, usually 1024.
– pacoverflow
Oct 31 '13 at 23:28
1
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In laymans terms, what does 'static' mean in Java? [duplicate]
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It should also be mentioned that a static field is shared by all instances of the class, thus all see the same value of it.
– Péter Török
Apr 15 '10 at 21:56
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Implementing IDisposable correctly
... to "clean up" strings and ints - they will be taken care of automatically by the garbage collector. The only thing that needs to be cleaned up in Dispose are unmanaged resources or managed recources that implement IDisposable.
However, assuming this is just a learning exercise, the recommended wa...
Reading/parsing Excel (xls) files with Python
...rkbook
workbook = xlrd.open_workbook('your_file_name.xlsx')
open sheet by name
worksheet = workbook.sheet_by_name('Name of the Sheet')
open sheet by index
worksheet = workbook.sheet_by_index(0)
read cell value
worksheet.cell(0, 0).value
...
Comparing boxed Long values 127 and 128
...variables the value 127 (cached), the same object instance will be pointed by all references. (N variables, 1 instance)
If you set to N Long variables the value 128 (not cached), you will have an object instance pointed by every reference. (N variables, N instances)
That's why this:
Long val1 = 1...
Is JavaScript guaranteed to be single-threaded?
...owser implementations, but is that specified in any standard or is it just by tradition? Is it totally safe to assume that JavaScript is always single-threaded?
...
How do I shutdown, restart, or log off Windows via a bat file?
... option is not documented in any official documentation. It was discovered by these StackOverflow users.
I want to make sure some other really good answers are also mentioned along with this one. Here they are in no particular order.
The -f option from JosephStyons
Using rundll32 from VonC
The...