Hash string to 32bit integer. Good for seeding prngs while also working as a tolerable prng itself.

mash.js

'not sure who original author was. possibly Baggoe
function Mash() {
  const initialize = 0xefc8249d;
  let first = true;
  return (seed = ' ', reset = first) => {
    if(reset) [n, first] = [initialize, false];
    seed = String(seed);
    let i = seed.length;
    while (i--) {
      //Basically, getting a value from each characters charCode, multiplying by a magic number, 
      //then hacking off the integer value. Rinse and repeat.
      let h = (n += seed.charCodeAt(i)) * 0.02519603282416938;
      h *= (h -= (n = h >>> 0));
      n += (h -= (n = h >>> 0)) * 0x100000000;
    }
    // uncomment below to have decimal values returned between 0 - 1.
    return (n >>> 0) /* * 2.3283064365386963e-10 */ ;
  };
};