text: var isObj = require('./isObj');
  var isArr = require('./isArr');
  var isFn = require('./isFn');
  var has = require('./has');
  
  exports = function(val) {
      if (!isObj(val)) return false;
      var ctor = val.constructor;
      if (!isFn(ctor)) return false;
      if (!has(ctor.prototype, 'isPrototypeOf')) return false;
      return !isArr(val) && !isFn(val);
  };
  
  module.exports = exports;
  