Did thanos kill you?

thanos.js

/*
    * Blazing fast!
    * Case insensitive
    * You can check your friends too!
    * Not Math.random() based
    * Same answers:
      - any device                        (i think...)
      - any time
      - any place
      - any universe
*/

const checksum = (s) => s.trim().toLowerCase().replace(/\s/g, '').split("").reduce((a, b) => {
    a = ((a << 5) - a) + b.charCodeAt(0);
    return a & a
}, 0);              

const didThanosKillYou = name => (checksum(name) % 2)
  ? "You were slain by Thanos, for the good of the Universe."
  : "You were spared by Thanos.";

/*
//Usage:
const name = prompt('Enter your name:');
alert(didThanosKillYou(name));
*/