根据对象中字段的存在对数组进行排序 JavaScript
javascriptweb developmentobject oriented programming更新于 2025/9/28 16:12:17
假设我们有以下对象数组 −
const people = [{
firstName: 'Ram',
id: 301
}, {
firstName: 'Shyam',
lastName: 'Singh',
id: 1016
}, {
firstName: 'Dinesh',
lastName: 'Lamba',
id: 231
}, {
id: 341
}, {
firstName: 'Karan',
lastName: 'Malhotra',
id: 441
}, {
id: 8881
}, {
firstName: 'Vivek',
id: 301
}];
我们需要对这个数组进行排序，以便同时具有 firstName 和 lastName 属性的对象首先出现，然后是具有 firstName 或 lastName 的对象，最后是既没有 firstName 也没有 lastName 的对象。
因此，此代码将是 −
示例
const people = [{
firstName: 'Ram',
id: 301
}, {
firstName: 'Shyam',
lastName: 'Singh',
id: 1016
}, {
firstName: 'Dinesh',
lastName: 'Lamba',
id: 231
}, {
id: 341
}, {
firstName: 'Karan',
lastName: 'Malhotra',
id: 441
}, {
id: 8881
}, {
firstName: 'Vivek',
id: 301
}];
const sorter = (a, b) => {
if(a.firstName && a.lastName){
return -1;
}else if(b.firstName || b.lastName){
return 1;
}else{
return -1;
};
};
people.sort(sorter);
console.log(people);
输出
控制台中的输出将是 −
[
{ firstName: 'Karan', lastName: 'Malhotra', id: 441 },
{ firstName: 'Dinesh', lastName: 'Lamba', id: 231 },
{ firstName: 'Shyam', lastName: 'Singh', id: 1016 },
{ firstName: 'Ram', id: 301 },
{ firstName: 'Vivek', id: 301 },
{ id: 8881 },
{ id: 341 }
]
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有用资源
javascript 参考教程 - 该教程包含有关 javascript 的更多信息:https://www.cainiaomax.com/javascript/
