Bitwise works on the binary level, so 0 on binary would seen as 0000_0000, and (in two's complemented) -1 is 1111_1111, this not 0 flips all the bits to 1s, thus alters 0 into -1.

These are the bitwise operators, all supported in JavaScript: op1 & op2 -- The AND operator compares two bits and generates a result of 1 if both bits are 1; otherwise, it returns 0.

Nov 28, 2011 · But on a bool, it's a logical operation:. Well, yes. But bools are single bits, and so a bit-wise OR is the same as a logical OR.

Aug 7, 2010 · Related: Bitwise operation and usage for bitwise boolean ops in general, pointing out that they do 32 (or 64 or whatever) separate bitwise boolean operations in parallel.

Dec 5, 2013 · Bitwise operations are much faster. This is why the compiler will use bitwise operations for you. Actually, I think it will be faster to implement it as: ~i & 1 Similarly, if you look at the assembly code your compiler generates, you may see things like x ^= x instead of x=0. But (I hope) you are not going to use this in your C++ code.

The Bitwise operators are used to perform operations a bit-level or to manipulate bits in different ways. The bitwise operations are found to be much faster and are some times used to improve the efficiency of a program. Basically, Bitwise operators can be applied to the integer types: long, int, short, char and byte. Bitwise Shift Operators

What are some real world use cases of the following bitwise operators? AND XOR NOT OR Left/Right shift

Except for specific circumstances, it is not possible to describe bitwise operations in other mathematical operations. An and operation with 2 n -1 is the same as a modulus operation with 2 n.

Jun 2, 2013 · @noufal: Thanks, but you still haven't addressed the very first comment, above. What is the motivation for this requirement? Is it branch-avoidance, an intellectual exercise, homework, or something else?

Jun 23, 2013 · The | operator is a bitwise "Or". The result is the bits that are turned on in either of the numbers. 1001 | 1100 = 1101, since only the second bit from the right is zero in both. There are also the ^ and ~ operators, that are bitwise "Xor" and bitwise "Not", respectively. Finally there are the <<, >> and >>> shift operators.