Lodash - 将对象移动到数组中的第一位而不是按另一个属性排序

Question

我有一个对象员工数组

    {
  "emp1": {
    "BusinessPartnerFormattedName": "Aleksandra Lewandowski",
    "EmpRoleCode": "BUP003",
    "EmpRoleType": "Employee",
    "EmployeeID": "E8000",
    "isAssigned" : true,
    "ObjectID": "00163E0E46241ED7A0EA0590D0655967"
  },
  "emp2": {
    "BusinessPartnerFormattedName": "Aleksandra Lewandowski",
    "EmpRoleCode": "BUP003",
    "EmpRoleType": "Employee",
    "EmployeeID": "E8000",
    "isAssigned" : true,
    "ObjectID": "00163E0E46241ED7A0EA0590D0655967"
  },
  "emp3": {
    "BusinessPartnerFormattedName": "Aleksandra Lewandowski",
    "EmpRoleCode": "BUP003",
    "EmpRoleType": "Employee",
    "EmployeeID": "E8000",
    "isAssigned" : false,
    "ObjectID": "00163E0E46241ED7A0EA0590D0655967"
  },
  "emp4": {
    "BusinessPartnerFormattedName": " Lewandowski",
    "EmpRoleCode": "BUP803",
    "EmpRoleType": "Employee",
    "EmployeeID": "BUP803",
    "isAssigned" : false,
    "ObjectID": "00163E0E46241ED7A0EA0590D0655967"
  },
  "emp5": {
    "BusinessPartnerFormattedName": "Aleksandra",
    "EmpRoleCode": "BUP043",
    "EmpRoleType": "Employee",
    "EmployeeID": "BUP043",
    "isAssigned" : false,
    "ObjectID": "00163E0E46241ED7A0EA0590D0655967"
  },
  "emp6": {
    "BusinessPartnerFormattedName": "Eva Log",
    "EmpRoleCode": "BUP0d03",
    "EmpRoleType": "Employee",
    "EmployeeID": "BUP0d03",
    "isAssigned" : false,
    "ObjectID": "00163E0E46241ED7A0EA0590D0655967"
  }
}

我想把EmployeeID等于E8000的员工放在列表中first，比我想要isAssigned等于的员工true关注

到目前为止，我已经做到了：

var sortedItems = _.sortBy(items, function(item) {
  return (item.isAssigned === true || item.EmployeeID === "E8000") ? 0 : 1;
});

但是如何确保带有EmployeeID 的emp 等于E8000 总是在最前面呢？

Answer 1

不知道为什么你需要 lodash：

items.sort((a,b)=>{
    if(a.EmployeeID !== b.EmployeeID){
        if(a.EmployeeID === 'E8000') return -1;
        if(b.EmployeeID === 'E8000') return 1;
    };

    if(a.isAssigned !== b.isAssigned){
        return a.isAssigned ? -1 : 1;
    }

    //Remaining sort logic...
})

这转化为：

"在决定是 a 还是 b 应该先出现时，如果 a 和 b 的 EmployeeID 值不同，请检查其中一个是否具有值 E8000。如果以太有那个值，把那个放在第一位。

否则，检查a 和b 是否与isAssigned 具有相同的值，如果没有，则将具有true 的值作为isAssigned 的值放在第一位。

最后，如果不满足前面的条件，请按照您想要设置的任何逻辑设置哪个应该先执行。

当然，你必须填写任何你想在那之后的排序逻辑。例如，如果您想在BusinessPartnerFormattedName 上按字母顺序排序，您可以在Remaining sort logic... 块中填充：

if(a.BusinessPartnerFormattedName < b.BusinessPartnerFormattedName) return -1;
if(a.BusinessPartnerFormattedName > b.BusinessPartnerFormattedName) return 1;
return 0;

Answer 2

你链接想要的排序顺序。

var array = [
        { name: "E8000 true", EmployeeID: "E8000", isAssigned : true },
        { name: "E8000 true", EmployeeID: "E8000", isAssigned : true },
        { name: "E8003 false", EmployeeID: "E8003", isAssigned : false },
        { name: "E8001 true", EmployeeID: "E8001", isAssigned : true },
        { name: "E8002 true", EmployeeID: "E8002", isAssigned : true },
        { name: "E8001 false", EmployeeID: "E8001", isAssigned : false }
    ];

array.sort((a, b) => 
    (b.EmployeeID === 'E8000') - (a.EmployeeID === 'E8000') ||
    b.isAssigned - a.isAssigned
);

console.log(array);

.as-console-wrapper { max-height: 100% !important; top: 0; }

用 lodash

var array = [
        { name: "E8000 true", EmployeeID: "E8000", isAssigned : true },
        { name: "E8000 true", EmployeeID: "E8000", isAssigned : true },
        { name: "E8003 false", EmployeeID: "E8003", isAssigned : false },
        { name: "E8001 true", EmployeeID: "E8001", isAssigned : true },
        { name: "E8002 true", EmployeeID: "E8002", isAssigned : true },
        { name: "E8001 false", EmployeeID: "E8001", isAssigned : false }
    ];

console.log(_.sortBy(array, [
    o => o.EmployeeID !== 'E8000',
    o => !o.isAssigned
]));

.as-console-wrapper { max-height: 100% !important; top: 0; }

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js"></script>

Answer 3

您提供的数据具有很强的误导性，但是我仍然想发布我的解决方案，因为基本上我只是喜欢它。

const items = [{BusinessPartnerFormattedName:"Aleksandra Lewandowski",EmpRoleCode:"BUP003",EmpRoleType:"Employee",EmployeeID:"E7000",isAssigned:!0,ObjectID:"00163E0E46241ED7A0EA0590D0655967"},{BusinessPartnerFormattedName:"Aleksandra Lewandowski",EmpRoleCode:"BUP003",EmpRoleType:"Employee",EmployeeID:"E6000",isAssigned:!1,ObjectID:"00163E0E46241ED7A0EA0590D0655967"},{BusinessPartnerFormattedName:"Aleksandra Lewandowski",EmpRoleCode:"BUP003",EmpRoleType:"Employee",EmployeeID:"E8000",isAssigned:!1,ObjectID:"00163E0E46241ED7A0EA0590D0655967"}];
const helper = (emp) => emp.EmployeeID === 'E8000' ? 2 : +(!!emp.isAssigned);

const r = items.sort((a, b) => helper(b) - helper(a));

console.log(r);