function toBinArray(arr : any, n : number) {
for (let i = 0; i < 8; i++) {
arr[i] = n & 0x80 ? '1' : '0';
n <<= 1;
}
}
const value = 13;
const arr = [0,0,0,0,0,0,0,0];
toBinArray(arr, value);
console.log(value + ' = ' + arr);
/*
run:
"13 = 0,0,0,0,1,1,0,1"
*/