Small function to check equality across any number of variables.

eql.js

/**
 * Check equality across any number of variables.
 *
 * @example <caption>Simple usage</caption>
 * var a = 1, b = 1, c = 1, d = 2;
 * eql(a, b, c); // returns True
 * eql(a, b, c, d); // returns False
 *
 * @example <caption>Wierd use cases</caption>
 * eql("foobar"); // returns True
 * eql(); // returns True
 *
 * @param {...*} arg The arguments to compare.
 * @return {boolean} True if all arguments are equal, false otherwise.
 * @license The-Unlicense
 */
function eql() {
  var base = arguments[0];
  for (var i = 1; i < arguments.length; i++) {
    if (base !== arguments[i]) return false;
  }
  
  return true;
}