我试图返回嵌套数组中具有特定“id”的所有对象。在示例数据中,我想返回业余爱好ID为2(徒步旅行)的所有人物。
另一个问题解决了根据对象值在数组中查找所有值的问题。
这个问题与前一个问题不同,因为我需要根据嵌套数组中的值返回所有对象。
[
{
"id":111222,
"name":"Faye",
"age":27,
"hobbies":[
{
"id":2,
"name":"hiking"
},
{
"id":3,
"name":"eating"
}
]
},
{
"id":223456789001,
"name":"Bobby",
"age":35,
"hobbies":[
{
"id":2,
"name":"hiking"
},
{
"id":4,
"name":"online gaming"
}
]
}
]
答案 0 :(得分:2)
function hasHobby(person, hobbyId) {
return person.hobbies.some(function(hobby) {
return hobby.id === hobbyId;
});
}
function filterByHobby(people, hobbyId) {
return people.filter(function(person) {
return hasHobby(person, hobbyId);
});
}
如果您想使用新酷的ES6语法:
function filterByHobby(people, hobbyId) {
return people.filter(
person => person.hobbies.some(
hobby => hobby.id === hobbyId
)
);
}
答案 1 :(得分:0)
var arr = [
{
"id":111222,
"name":"Faye",
"age":27,
"hobbies":[
{
"id":2,
"name":"hiking"
},
{
"id":3,
"name":"eating"
}
]
},
{
"id":223456789001,
"name":"Bobby",
"age":35,
"hobbies":[
{
"id":2,
"name":"hiking"
},
{
"id":4,
"name":"online gaming"
}
]
}
];
arr.filter(function(obj) {
var hobbies = obj.hobbies;
var x = hobbies.filter(function(hob) {
if (hob.id == "2") return true;
});
if (x.length > 0) return true;
});
答案 2 :(得分:0)
试试这个,我认为它解决了你的问题:
var arr = [{
"id": 111222,
"name": "Faye",
"age": 27,
"hobbies": [{
"id": 2,
"name": "hiking"
}, {
"id": 3,
"name": "eating"
}]
}, {
"id": 223456789001,
"name": "Bobby",
"age": 35,
"hobbies": [{
"id": 2,
"name": "hiking"
}, {
"id": 4,
"name": "online gaming"
}]
}];
var x = arr.filter(function(el) {
var rnel = el.hobbies.filter(function(nel) {
return nel.id == 2;
});
return rnel.length > 0 ? true :false;
});
alert(x.length);