script.run.ts

#!/bin/sh

/*/.this-doesnt-exist 2>/dev/null
## Please do not edit this part of the script, this is a loader created by "npx bun-self"
if ! [ -x "$(command -v bun)" ]; then
    ## it's possible that bun is installed but not in the PATH, let's check if BUN_INSTALL is set
    if [ -z "$BUN_INSTALL" ]; then
        export BUN_INSTALL="$HOME/.bun"
        export PATH="$BUN_INSTALL/bin:$PATH"
    fi
    if ! [ -x "$(command -v bun)" ]; then
        echo "Installing bun.sh"
        [ -z "$CI" ] && sleep 2
        curl -fsSL https://bun.sh/install | bash
        echo "Now let's run the script"
        echo ""
    fi >&2
fi
bun "$0" "$@"
exit 0
#*/

// Script starts here
// https://github.com/bryc/code/blob/master/jshash/experimental/cyrb53.js
/*
    cyrb53a (c) 2023 bryc (github.com/bryc)
    License: Public domain. Attribution appreciated.
    The original cyrb53 has a slight mixing bias in the low bits of h1.
    This shouldn't be a huge problem, but I want to try to improve it.
    This new version should have improved avalanche behavior, but
    it is not quite final, I may still find improvements.
    So don't expect it to always produce the same output.
*/
const cyrb53a = function(str, seed = 0) {
  let h1 = 0xdeadbeef ^ seed, h2 = 0x41c6ce57 ^ seed;
  for(let i = 0, ch; i < str.length; i++) {
    ch = str.charCodeAt(i);
    h1 = Math.imul(h1 ^ ch, 0x85ebca77);
    h2 = Math.imul(h2 ^ ch, 0xc2b2ae3d);
  }
  h1 ^= Math.imul(h1 ^ (h2 >>> 15), 0x735a2d97);
  h2 ^= Math.imul(h2 ^ (h1 >>> 15), 0xcaf649a9);
  h1 ^= h2 >>> 16; h2 ^= h1 >>> 16;
    return 2097152 * (h2 >>> 0) + (h1 >>> 11);
};

console.log('hash for empty string =', cyrb53a(""));
console.log('hash for a =', cyrb53a("a"));
console.log('hash for space =', cyrb53a(" "));