Shows keys recursively from a root object.

recurseKeys.js

var lodash = require('lodash');
var _seenObjects = [];

var recurseKeys = function(name, obj){

  var duplicate;
  if (( duplicate = lodash.find(_seenObjects, function(seen){
    return seen.obj === obj;
  }) )) {
    console.log(name, '=> (DUPLICATE of',duplicate.name+')');
    return;
  }

  _seenObjects.push({ name: name, obj: obj });
  console.log(name, '=> {Object}');

  var keys = lodash.keys(obj);
  lodash.each(keys, function(key){
    var val = obj[key];

         if (lodash.isNull         (val)) { console.log(name+'.'+key, '=> NULL'                ); }
    else if (lodash.isUndefined    (val)) { console.log(name+'.'+key, '=> UNDEFINED'           ); }
    else if (lodash.isNaN          (val)) { console.log(name+'.'+key, '=> NaN'                 ); }
    else if (lodash.isNumber       (val)) { console.log(name+'.'+key, '=> {Number}'      , val ); }
    else if (lodash.isBoolean      (val)) { console.log(name+'.'+key, '=> {Bool}'        , val ); }
    else if (lodash.isTypedArray   (val)) { console.log(name+'.'+key, '=> {Array(Type)}'       ); }
    else if (lodash.isArray        (val)) { console.log(name+'.'+key, '=> {Array}'             ); }
    else if (lodash.isArguments    (val)) { console.log(name+'.'+key, '=> {Arguments}'         ); }
    else if (lodash.isElement      (val)) { console.log(name+'.'+key, '=> {Element}'           ); }
    else if (lodash.isDate         (val)) { console.log(name+'.'+key, '=> {Date}'        , val ); }
    else if (lodash.isError        (val)) { console.log(name+'.'+key, '=> {Error}'             ); }
    else if (lodash.isFunction     (val)) { console.log(name+'.'+key, '=> {Function}'          ); }
    else if (lodash.isRegExp       (val)) { console.log(name+'.'+key, '=> {RegExp}'            ); }
    else if (lodash.isString       (val)) { console.log(name+'.'+key, '=> {String}'            ); }
    else if (lodash.isPlainObject  (val)) {
      // console.log(name+'.'+key, '=> {Object}');
      recurseKeys(name+'.'+key, val);
    }
    else if (lodash.isObject       (val)) {
      // console.log(name+'.'+key, '=> {Object}');
      recurseKeys(name+'.'+key, val);
    }
    else {
      console.log(name+'.'+key, '=> ?');
    }
  });

};