code: function (obj, var_type) {
  
  		var text_class = Object.prototype.toString.call(obj).slice(8, -1);
  		return (text_class == var_type);
  
  	}
docs: Whether the variable type is matched with the specified variable type
  @param  {Object}  obj      Target variable
  @param  {String}  var_type Expected variable type
  @return {Boolean}          Whether the type is matched