Javascript 如何按属性筛选对象数组

我有一个对象数组，如下所示：

finalistsCollection = [
    { name: 'Ann' , sections: [{id: '132', name: 'someName'}, {id: '456', name: 'someName'}] },
    { name: 'Jack' , sections: [{id: '798', name: 'someName'}] },
    { name: 'Morgan', sections: [{id: '456', name: 'someName'}] },
    { name: 'Billy', sections: [{id: '132', name: 'someName'}, {id: '456', name: 'someName'}]}, 
    { name: 'Monica', sections: [{id: '798', name: 'someName'}] }
]

如何按id值筛选此数组？现在，如果

sections

数组中只有一个对象，我会进行过滤：

filter(directionId) {
     filteredCollection = this.finalistsCollection.filter((item) => item.sections[0].id === directionId
}

---

我尝试在过滤器之后使用

map（）

函数，但它仍然返回整个数组。

您可以在这里使用一个小技巧作为条件：

sections.map(section=>section.id).includes(directionId)

finalitscollection=[
{name:'Ann'，部分：[{id:'132'，name:'someName'}，{id:'456'，name:'someName'}]}，
{name:'Jack'，sections:[{id:'798'，name:'someName'}]}，
{name:'Morgan'，sections:[{id:'456'，name:'someName'}]}，
{name:'Billy'，部分：[{id:'132'，name:'someName'}，{id:'456'，name:'someName'}]}，
{name:'Monica'，部分：[{id:'798'，name:'someName'}]}
]
函数筛选器（directionId）{
返回FinallitCollection.filter（（项目）=>
item.sections.map（section=>section.id）.includes（directionId））
}
console.log（过滤器（'798'））
console.log（过滤器（'456'））
console.log（过滤器（'112'））

此：

希望这有帮助

let finalistsCollection = [
  { name: 'Ann' , sections: [{id: '132', name: 'someName'}, {id: '456', name: 'someName'}] },
  { name: 'Jack' , sections: [{id: '798', name: 'someName'}] },
  { name: 'Morgan', sections: [{id: '456', name: 'someName'}] },
  { name: 'Billy', sections: [{id: '132', name: 'someName'}, {id: '456', name: 'someName'}]}, 
  { name: 'Monica', sections: [{id: '798', name: 'someName'}] }
]

function filter(directionId) {
  return finalistsCollection.filter(item =>
    item.sections.some(x => x.id === directionId)
  );
}

console.log(filter('456'));

---

使用

filter（'456'）

filter（'456'）

应返回一个包含3项的数组。对此表示抱歉。我的回答这能回答你的问题吗？

let finalistsCollection = [
  { name: 'Ann' , sections: [{id: '132', name: 'someName'}, {id: '456', name: 'someName'}] },
  { name: 'Jack' , sections: [{id: '798', name: 'someName'}] },
  { name: 'Morgan', sections: [{id: '456', name: 'someName'}] },
  { name: 'Billy', sections: [{id: '132', name: 'someName'}, {id: '456', name: 'someName'}]}, 
  { name: 'Monica', sections: [{id: '798', name: 'someName'}] }
]

function filter(directionId) {
  return finalistsCollection.filter(item =>
    item.sections.some(x => x.id === directionId)
  );
}

console.log(filter('456'));