LintCode 181. Convert integer A to B JavaScript algorithm

description

If you want to convert an integer n to m, how many bits need to be changed?

Description

Both n and m are 32-bit integers.

Sample

- Example 1:
	Input: n = 31, m = 14
	Output:  2
	
	Explanation:
	(11111) -> (01110) there are two different bits.


- Example 2:
	Input: n = 1, m = 7
	Output:  2
	
	Explanation:
	(001) -> (111) will change two bits.

challenge

How many ways can you think of?

Parsing

Various operations in binary are used here

bitSwapRequired = (a, b) => {
    
    
    var s = 0, c;
    for (c = a ^ b; c !== 0; c = c >>> 1) {
    
    
        s += c & 1;
    }
    return s;
}

operation result