text: // Based on: https://github.com/mathiasbynens/String.prototype.codePointAt
  // Thanks @mathiasbynens !
  
  "use strict";
  
  var toInteger  = require("../../../number/to-integer")
    , validValue = require("../../../object/valid-value");
  
  module.exports = function (pos) {
  	var str = String(validValue(this)), length = str.length, first, second;
  	pos = toInteger(pos);
  
  	// Account for out-of-bounds indices:
  	if (pos < 0 || pos >= length) return undefined;
  
  	// Get the first code unit
  	first = str.charCodeAt(pos);
  	if (first >= 0xd800 && first <= 0xdbff && length > pos + 1) {
  		second = str.charCodeAt(pos + 1);
  		if (second >= 0xdc00 && second <= 0xdfff) {
  			// http://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
  			return (first - 0xd800) * 0x400 + second - 0xdc00 + 0x10000;
  		}
  	}
  	return first;
  };
  