for (var index in res.data) {
	title : res.data[index].title
 }

for (var i = 0; i < datas.length; ++i) {
  console.log(i);
  console.log(datas[i].name);
}

yourData.forEach(function(item, index){
	console.log(item); 
	console.log(index); 
})

<view wx:for="{{array}}" wx:for-index="idx" wx:for-item="item">
  {{item.message}}
</view>