你好 Stack Overflow 社区!
我有以下测试数组:
let test = [{
"searchQuery": "test",
"resultsLoaded": -1,
"offset": -1,
"allResults": 10
}, {
"metaData": {
"type": "page-content",
"image": true,
"name": "lorem-ipsum",
"rank": 10,
"tags": ["website:lorem/ipsum"]
},
"componentData": {
"header": "Lorem Ipsum",
"path": "/content/asdf",
"breadcrumbDouble": {
"breadcrumbItem1": {
"href": "lorem ipsum",
"text": "lorem ipsum"
},
"breadcrumbItem2": {
"href": "/content/asdf",
"text": "Lorem Ipsum"
}
},
"content": {
"subheadline": "Lorem Ipsum",
"img": {
"alt": "",
"imgSrc": "/content/dam/production/images/asdf.jpeg.imgTransformer/listPageItem/desktop/1511962617778/asdf.jpg"
},
"tags": [{
"category": "lorem",
"value": "ipsum"
}]
}
}
}, {
"metaData": {
"type": "page-content",
"image": true,
"name": "lorem-ipsum",
"rank": 50,
"tags": ["website:lorem/ipsum"]
},
"componentData": {
"header": "Lorem Ipsum",
"path": "/content/asdf",
"breadcrumbDouble": {
"breadcrumbItem1": {
"href": "lorem ipsum",
"text": "lorem ipsum"
},
"breadcrumbItem2": {
"href": "/content/asdf",
"text": "Lorem Ipsum"
}
},
"content": {
"subheadline": "Lorem Ipsum",
"img": {
"alt": "",
"imgSrc": "/content/dam/production/images/asdf.jpeg.imgTransformer/listPageItem/desktop/1511962617778/asdf.jpg"
},
"tags": [{
"category": "lorem",
"value": "ipsum"
}]
}
}
}, {
"metaData": {
"type": "page-content",
"image": true,
"name": "lorem-ipsum",
"rank": 30,
"tags": ["website:lorem/ipsum"]
},
"componentData": {
"header": "Lorem Ipsum",
"path": "/content/asdf",
"breadcrumbDouble": {
"breadcrumbItem1": {
"href": "lorem ipsum",
"text": "lorem ipsum"
},
"breadcrumbItem2": {
"href": "/content/asdf",
"text": "Lorem Ipsum"
}
},
"content": {
"subheadline": "Lorem Ipsum",
"img": {
"alt": "",
"imgSrc": "/content/dam/production/images/asdf.jpeg.imgTransformer/listPageItem/desktop/1511962617778/asdf.jpg"
},
"tags": [{
"category": "lorem",
"value": "ipsum"
}]
}
}
}];
我现在想要实现的是按照 metaData.rank
从高到低对对象进行排序。
我想像这样使用 lodash 的 orderBy()
:
let result = orderBy(test, function(e) {
let array = parseInt(e.metaData.rank);
return array;
}, ['desc']);
但是我得到以下错误:
TypeError: Cannot read property 'rank' of undefined
console.log(e)
在我的 orderBy
函数中向我展示了这个:
{
searchQuery: 'test',
resultsLoaded: -1,
offset: -1,
allResults: 10
}
有什么解决此问题的快速建议吗?
我知道第一个对象由于结构不同而导致问题。所以我需要解决它!
最佳答案
您可以将没有 metaData
属性的项目移至顶部,然后按 rank
对其余项目进行排序。
var array = [{ searchQuery: "test", resultsLoaded: -1, offset: -1, allResults: 10 }, { metaData: { type: "page-content", image: true, name: "lorem-ipsum", rank: 10, tags: ["website:lorem/ipsum"] }, componentData: { header: "Lorem Ipsum", path: "/content/asdf", breadcrumbDouble: { breadcrumbItem1: { href: "lorem ipsum", text: "lorem ipsum" }, breadcrumbItem2: { href: "/content/asdf", text: "Lorem Ipsum" } }, content: { subheadline: "Lorem Ipsum", img: { alt: "", imgSrc: "/content/dam/production/images/asdf.jpeg.imgTransformer/listPageItem/desktop/1511962617778/asdf.jpg" }, tags: [{ category: "lorem", value: "ipsum" }] } } }, { metaData: { type: "page-content", image: true, name: "lorem-ipsum", rank: 50, tags: ["website:lorem/ipsum"] }, componentData: { header: "Lorem Ipsum", path: "/content/asdf", breadcrumbDouble: { breadcrumbItem1: { href: "lorem ipsum", text: "lorem ipsum" }, breadcrumbItem2: { href: "/content/asdf", text: "Lorem Ipsum" } }, content: { subheadline: "Lorem Ipsum", img: { alt: "", imgSrc: "/content/dam/production/images/asdf.jpeg.imgTransformer/listPageItem/desktop/1511962617778/asdf.jpg" }, tags: [{ category: "lorem", value: "ipsum" }] } } }, { metaData: { type: "page-content", image: true, name: "lorem-ipsum", rank: 30, tags: ["website:lorem/ipsum"] }, componentData: { header: "Lorem Ipsum", path: "/content/asdf", breadcrumbDouble: { breadcrumbItem1: { href: "lorem ipsum", text: "lorem ipsum" }, breadcrumbItem2: { href: "/content/asdf", text: "Lorem Ipsum" } }, content: { subheadline: "Lorem Ipsum", img: { alt: "", imgSrc: "/content/dam/production/images/asdf.jpeg.imgTransformer/listPageItem/desktop/1511962617778/asdf.jpg" }, tags: [{ category: "lorem", value: "ipsum" }] } } }];
array.sort(function (a, b) {
return ('metaData' in a) - ('metaData' in b) || b.metaData.rank - a.metaData.rank;
});
console.log(array);
.as-console-wrapper { max-height: 100% !important; top: 0; }
关于javascript - 使用 lodash 按键对数组中的对象进行排序,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/47556532/