Javascript 如果值为空，则删除对象

array1是一个对象数组，如下所示：

0: {Group: 1, names: "Lastname1, Firstname1", id: 20000001}
1: {Group: 2, names: "Lastname2, Firstname2", id: 20000002}
2: {Group: 3, names: "Lastname3, Firstname3", id: 20000003}

0: {id: "20000001", photo: ""}
1: {id: "20000001", photo: "/9j/4AAQSkZJRgABAQAAAQABAAD/4QB6RXhpZgAASUkqAAgAAA…9a1EtFKAnd09f/rVlwfdFbVw7LPIoOAGNYwjc/SIaxR//2Q=="}
2: {id: "20000002", photo: ""}
3: {id: "20000003", photo: ""}
4: {id: "20000004", photo: ""}

function getForId(photos, id) {
    var tmp = photos.filter(ph => ph.id == id).filter(ph => ph.photo != "");
    if (tmp.length == 0) return undefined;
    return tmp[0];
}

...

x = getForId(array2, "20000001");

array2也是一个对象数组，如下所示：

0: {Group: 1, names: "Lastname1, Firstname1", id: 20000001}
1: {Group: 2, names: "Lastname2, Firstname2", id: 20000002}
2: {Group: 3, names: "Lastname3, Firstname3", id: 20000003}

0: {id: "20000001", photo: ""}
1: {id: "20000001", photo: "/9j/4AAQSkZJRgABAQAAAQABAAD/4QB6RXhpZgAASUkqAAgAAA…9a1EtFKAnd09f/rVlwfdFbVw7LPIoOAGNYwjc/SIaxR//2Q=="}
2: {id: "20000002", photo: ""}
3: {id: "20000003", photo: ""}
4: {id: "20000004", photo: ""}

function getForId(photos, id) {
    var tmp = photos.filter(ph => ph.id == id).filter(ph => ph.photo != "");
    if (tmp.length == 0) return undefined;
    return tmp[0];
}

...

x = getForId(array2, "20000001");

我想获取基于array1的特定id的照片值。我的array2可以有重复的id值，因此我想忽略带有空字符串的值

因此，在一天结束时，我想返回类似

var image='/9j/4AAQSKZJRGABAQAAAQABAD/4QB6R…“

您可以使用它来获取所需的值。它将返回找到的第一个值。空字符串在javascript中为falser，因此您可以编写查找回调，如下所示：

var array2 = [{id: "20000001", photo: ""},
{id: "20000001", photo: "/9j/4AAQSkZJRgABAQAAAQABAAD/4QB6RXhpZgAASUkqAAgAAA…9a1EtFKAnd09f/rVlwfdFbVw7LPIoOAGNYwjc/SIaxR//2Q=="},
{id: "20000002", photo: ""},
{id: "20000003", photo: ""},
{id: "20000004", photo: ""}];

var result = array2.filter(function(a){ return a.photo }).map(a => a.photo);

让arr=[
{id:“2000001”，照片：}，
{id:“2000001”，照片：“/9j/4AAQSKZJRGABAQAAAQABAD/4QB6RXhpZgAASUkqAAgAAA…9AETFKAND09F/RVLWFDFFBVW7LPIOAGNYWJC/SIaxR//2Q==”，
{id:“2000002”，照片：}，
{id:“2000003”，照片：}，
{id:“2000004”，照片：}
]
let found=arr.find（item=>item.photo&&item.id==='2000001'）
console.log（found.photo）

让arr=[{
id:“2000001”，
照片：“
},
{
id:“2000001”，
照片：“/9j/4AAQSKZJRGABAQAAAQABAD/4QB6RXhpZgAASUkqAAgAAA…9AETFKAND09F/RVLWFDFFBVW7LPIOAGNYWJC/SIaxR//2Q=”
},
{
id:“2000002”，
照片：“
},
{
id:“2000003”，
照片：“
},
{
id:“2000004”，
照片：“
}
]
函数findItemByID（arr，id）{
返回arr.find（（photoObj）=>{
返回photoObj.photo.trim（）.length！==0&&photoObj.id==id
})
}
设photoObj=finditembyd（arr，“2000001”）；
控制台日志（photoObj.photo）尝试以下方法：

0: {Group: 1, names: "Lastname1, Firstname1", id: 20000001}
1: {Group: 2, names: "Lastname2, Firstname2", id: 20000002}
2: {Group: 3, names: "Lastname3, Firstname3", id: 20000003}

0: {id: "20000001", photo: ""}
1: {id: "20000001", photo: "/9j/4AAQSkZJRgABAQAAAQABAAD/4QB6RXhpZgAASUkqAAgAAA…9a1EtFKAnd09f/rVlwfdFbVw7LPIoOAGNYwjc/SIaxR//2Q=="}
2: {id: "20000002", photo: ""}
3: {id: "20000003", photo: ""}
4: {id: "20000004", photo: ""}

function getForId(photos, id) {
    var tmp = photos.filter(ph => ph.id == id).filter(ph => ph.photo != "");
    if (tmp.length == 0) return undefined;
    return tmp[0];
}

...

x = getForId(array2, "20000001");

您可以（通过
Array.map
）映射主数组，并对每个项目使用
Array.find
获取其
照片。然后按如下方式分配给当前项：

0: {Group: 1, names: "Lastname1, Firstname1", id: 20000001}
1: {Group: 2, names: "Lastname2, Firstname2", id: 20000002}
2: {Group: 3, names: "Lastname3, Firstname3", id: 20000003}

0: {id: "20000001", photo: ""}
1: {id: "20000001", photo: "/9j/4AAQSkZJRgABAQAAAQABAAD/4QB6RXhpZgAASUkqAAgAAA…9a1EtFKAnd09f/rVlwfdFbVw7LPIoOAGNYwjc/SIaxR//2Q=="}
2: {id: "20000002", photo: ""}
3: {id: "20000003", photo: ""}
4: {id: "20000004", photo: ""}

function getForId(photos, id) {
    var tmp = photos.filter(ph => ph.id == id).filter(ph => ph.photo != "");
    if (tmp.length == 0) return undefined;
    return tmp[0];
}

...

x = getForId(array2, "20000001");


const data=[{Group:1，name:“Lastname1，Firstname1”，id:2000001}，{Group:2，name:“Lastname2，Firstname2”，id:2000002}，{Group:3，name:“Lastname3，Firstname3”，id:2000003}]
const images=[{id:“2000001”，照片：“}，{id:“2000001”，照片：“/9j/4AAQSKZJRGABAAQAAAQAAAD/4QB6RXHPZGAASUQAAGAAA…9A1ETFBKAND09F/RVLWFFBVW7LPIOAGNYWJC/SIaxR//2Q=”，{id:“2000002”，照片：“}]
const result=data.map（x=>{
让img=images.find（i=>x.id==i.id&&i.photo！=''）
if（img）Object.assign（x，{photo:img.photo}）
返回x
})
console.log（结果）
使用数组的
过滤器（）。阅读此处：…如果您仍然有问题，请返回我们。您可以循环它并仅在值不为空时获取，然后如果您对一个值满意，请退出循环。请您帮助我，我使用了您的实现。