[B@rmaley.e><e]

function forEach(data, callback){
  for(var key in data){
    if(data.hasOwnProperty(key)){
      callback(key, data[key]);
    }
  }
}

forEach({a: 5, b: 7, c: 42, d: 'Hello, world!'}, function(key, value){alert(key + ': ' + value)})