Inspecting a JavaScript object

gistfile1.js

Object.prototype._methods = function() {
  var methods = [];
  for (m in this) {   
    if (typeof this[m] === 'function' && m !== '_methods' && m !== '_properties') {
      methods.push(m);
    }
  }
  return methods;
}
  
Object.prototype._properties = function() {
  var properties = [];
  for (p in this) {   
    if (typeof this[p] !== 'function') {
      properties.push(p + "=" + this[p]);
    }
  }
  return properties;
}

console.log({b: function() {}}._methods());

console.log({a: 1, c: "dfa"}._properties());