javascript - Traverse the object and output the current key-value pair

Question

var obj={ 'sprite-icon.png': 'sprite-icon.png?v=62df6cbea3',
  'sprite-icon_ie9.png': 'sprite-icon_ie9.png?v=5f35b8f025' };
  
  for(name in obj){
    console.log(name);
}

 遍历对象，并输出 当前是第几个键值对。以及这个对象总共有多少个键值对。

Answer 1

var obj = {
  a: 1,
  b: 2,
  c: 3
};

var keys = Object.keys(obj);
console.log('长度', keys.length);
keys.forEach(function(key, index) {
  console.log('当前是第', index + 1, '个, key是', key, ', value是', obj[key]);
});

Answer 2

Object.keys(obj).forEach((item,index)=>{console.log(item,obj[item],index)})
Object.keys(obj).length

Answer 3

Correct answer upstairs, please add words for like