题解 | 求int型正整数在内存中存储时1的个数

const rl = require("readline").createInterface({ input: process.stdin });
var iter = rl[Symbol.asyncIterator]();
const readline = async () => (await iter.next()).value;

void async function () {
    // Write your code here
    while(line = await readline()){
        let str = parseInt(line,10).toString(2) + '';
        str = [...str]
        let count = 0
        str.forEach(e=> e == '1' ? count++ : '')
        console.log(count)
    }
}()