I\'ve used the following macro in C: #definetest_bit(_n,_p)!! ( _n & ( 1u << _p)) I\'ve studied the macro but I need to determine the use of the double negative in the macro, and how it b
This question already has answers here: Closed 11 years ago. Possible Duplicate: Creating multiple numbers with certain number of bits set
I am trying to find a way to reverse a number without Converting it to a string to find the length Reversing the string and parsing it back
bitwise operators only work on integers in PHP and the maximum size of an integer is 2^63 on 64bit servers. If I create a value greater than that it will cast my variable to a float and bitwise operat
This question already has answers here: Write your own implementation of math's floor function, C 开发者_运维问答
Line 294 of java.util.Random source says if ((n & -n) == n) //开发者_StackOverflow社区 i.e., n is a power of 2
I currently have a script that calculates the tanimoto coefficient o开发者_StackOverflow中文版n the fingerprints of a chemical library. However during testing I found my implementation could not be fe
I need to create开发者_StackOverflow three bit masks that end up in three 32-bit unsigned ints (let\'s call them x, y and z). The masks should end up like this:
I\'m looking at the entry Find the log base 2 of an N-bit integer in O(lg(N)) operations with multiply and lookup from Bit Twiddling hacks.
I\'m attempting to convert so开发者_如何学JAVAme of my Java code to (J)Ruby, and due to my lack of experience of bitwise operations, I ran into a problem that I can\'t seem to be able to solve by myse
加载中,请稍侯......