In .net, does a bool[] use one bit or one byte per array item? ie, does it automatically pack the bool values? I know a single bool uses 1 byte, but maybe the CLR has a special case for bool[]...
+4
A:
One byte per value. I'm trying to find where this is actually specified (if indeed it is) but it's true for the current .NET CLR.
EDIT: This is sort of confirmed by printing sizeof(bool) which prints 1 - although the sizeof operator in C# doesn't end up calling the sizeof IL instruction...
Jon Skeet
2009-07-15 11:23:49
What's the size of a bool in other languages (Java/C/C++)?
Chris S
2009-07-15 11:34:38
In Java a boolean is 1 byte as well (in an array).
Jon Skeet
2009-07-15 11:36:08
In C/C++ it's also 1 byte size
Kamarey
2009-07-15 11:47:34
The size of bool in C++ isn't specified. It is only guaranteed that it should be at least the size of char (at least 8 bits), and at most equal to the size of long. I think really old versions of VC++ and g++ implemented it as an enum typedef, which would make it as big as int. In newer versions of VC++, it is a built-in type of size 1 byte; it's probably the same for newer versions of g++ as well.
Firas Assaad
2009-07-15 12:06:19
+7
A:
What you want is a BitArray. bool[] gets no special treatment by the CLR.
Martinho Fernandes
2009-07-15 11:24:45