如何将嵌套对象的项推入数组(项未定义)

Question

我有一个名为复仇女神的对象

const nemesis= {
   name: 'api_G',
   badAss: true,
   inventory: [],
   health: 10,
   item: {type: "SQLinjections", damage: 100,
  },
 }

我想使用名为weaponize的函数将key 'type‘从item对象推送到空的库存数组中

  function weaponize(nemesis, item){

   let pushItem  = nemesis.item.type
   let pickItem = nemesis.inventory.push(pushItem);

   return pickItem;

  }

但是调用该函数会抛出一个错误

TypeError:无法读取未定义的属性'item‘

Answer 1

您不需要第二个参数item，只需将nemesis对象传递给函数即可：

​

const nemesis= {
   name: 'api_G',
   badAss: true,
   inventory: [],
   health: 10,
   item: {type: "SQLinjections", damage: 100,
  },
 }


function weaponize(nemesis){
 let pushItem  = nemesis.item.type
 nemesis.inventory.push(pushItem);
 return nemesis;
}

console.log(weaponize(nemesis));

​