In Javascript when I do this var num = 1; ~ num == -2 why does ~num not equal 0 in binary 1 is stored as 1 ... thus not 1 should be 0
I want to store some flags into a mongo db. For now I have the following: > db.test.save({a:0x1}) > db.test.save({a:0x3})
Given a bitmask where the set bits describe where another number can be one or zero and the unset bits must be zero in开发者_运维问答 that number. What\'s a good way to iterate through all its possibl
This question already has answers here: 开发者_开发技巧 Closed 11 years ago. Possible Duplicate: Best algorithm to count the number of set bits in a 32-bit integer?
Apparently this used to wor开发者_StackOverflow中文版k on ruby 1.8.7 but unfortunately not on 1.9.2
This question already has answers here: Closed 11 years ago. Possible Duplicate: Find if every even bit is set to 0 using bitwise operators
I have a 32 bit int I can only access it 8 bits at a time. I need to find out if every even bit is set 开发者_JAVA百科to 0 and return 0 if its true and 1 otherwise.
This question already has an answer here: Closed 开发者_Python百科11 years ago. Possible Duplicate:
My function takes in a 32 bit int and I need to return a 0 or 1 if that number has a 1 in any even position. I cant use any conditional statements I also can only access 8 bits at a time.
How do I explain the following behavior? #include<iostream> using namespace std; int main(){ unsigned char a = 8;
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