lerpArray.js

var a = 'Going down to brown town';

String.prototype.lerp = function(n){
  var ai = Math.floor(n);
  var t = n - ai;
  var a = this.charCodeAt(ai); 
  var b = this.charCodeAt(ai + 1);
  return String.fromCharCode(a + (b - a) * t);
}

console.log(a.lerp(6.2));

// I'm only doing this because I know it'll annoy *everyone*