将十进制数字转为二进制数字字符串

Question

toString

const num = 10
num.toString(2)

手动实现

function transform(x) {
    let res = ''
    while (x) {
        const digit = x & 1 ? '1' : '0'
        res = digit + res
        x >>= 1
    }
    return res
}

数学实现

function transform(num){
    let res = '';
    while(num){
        let val = num % 2;
        num = Math.floor(num / 2);
        res = val + res;
    }
    return res;
}