如何使用Array.prototype.sort()按兩個屬性對陣列進行排序？[復制]

如何使用Array.prototype.sort()bytype和currency按此順序對陣列進行排序：

借記 => 貸記 => 外部 => 貸款

如果同一型別有多種貨幣，則按以下順序排列：

盧布 => 美元 => 歐元 => 英鎊

我了解如何對數字使用 sort()，但我不了解如何進行此類排序。

const accounts = [
  { id: 1, type: 'credit', currency: 'GBP' },
  { id: 2, type: 'debit', currency: 'EUR' },
  { id: 3, type: 'loan' },
  { id: 4, type: 'credit', currency: 'RUB' },
  { id: 5, type: 'credit', currency: 'RUB' },
  { id: 6, type: 'debit', currency: 'USD' },
  { id: 7, type: 'debit', currency: 'RUB' },
  { id: 8, type: 'external' },
  { id: 9, type: 'credit', currency: 'EUR' }
];

accounts.sort((a, b) => {
  
});

uj5u.com熱心網友回復：

您可以將type和currency屬性的順序存盤在陣列中，然后減去索引以確定優先級：

const typeOrder = ['debit', 'credit', 'external', 'loan']
const currencyOrder = ['RUB', 'USD', 'EUR', 'GBT']

const accounts=[{id:1,type:"credit",currency:"GBP"},{id:2,type:"debit",currency:"EUR"},{id:3,type:"loan"},{id:4,type:"credit",currency:"RUB"},{id:5,type:"credit",currency:"RUB"},{id:6,type:"debit",currency:"USD"},{id:7,type:"debit",currency:"RUB"},{id:8,type:"external"},{id:9,type:"credit",currency:"EUR"}];accounts.sort((e,c)=>{});

const res = accounts.sort((a,b) => {
  return typeOrder.indexOf(a.type) - typeOrder.indexOf(b.type) || currencyOrder.indexOf(a.currency) - currencyOrder.indexOf(b.currency)
})

console.log(res)

uj5u.com熱心網友回復：

您可以為訂單獲取物件并使用邏輯 OR 鏈接增量。

const
    types = { debit: 1, credit: 2, external: 3, loan: 4 },
    currencies = { RUB: 1, USD: 2, EUR: 3, GBT: 4 },
    accounts = [{ id: 1, type: 'credit', currency: 'GBP' }, { id: 2, type: 'debit', currency: 'EUR' }, { id: 3, type: 'loan' }, { id: 4, type: 'credit', currency: 'RUB' }, { id: 5, type: 'credit', currency: 'RUB' }, { id: 6, type: 'debit', currency: 'USD' }, { id: 7, type: 'debit', currency: 'RUB' }, { id: 8, type: 'external' }, { id: 9,
type: 'credit', currency: 'EUR' }];

accounts.sort((a, b) => 
    types[a.type] - types[b.type] ||
    currencies[a.currency] - currencies[b.currency]
);

console.log(accounts);

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

uj5u.com熱心網友回復：

這是最簡單的

當 order1 為 0（a 和 b 相同）時，我們使用 order2

const order1 = ["debit","credit","external","loan"],
order2 = ["RUB","USD","EUR","GBT"]

const accounts = [ { id: 1, type: 'credit', currency: 'GBP', }, { id: 2, type: 'debit', currency: 'EUR', }, { id: 3, type: 'loan', }, { id: 4, type: 'credit', currency: 'RUB', }, { id: 5, type: 'credit', currency: 'RUB', }, { id: 6, type: 'debit', currency: 'USD', }, { id: 7, type: 'debit', currency: 'RUB', }, { id: 8, type: 'external', }, { id: 9, type: 'credit', currency: 'EUR', }, ]; 

accounts.sort((a, b) => { 
  return order1.indexOf(a.type) - order1.indexOf(b.type) || 
  order2.indexOf(a.currency) - order2.indexOf(b.currency)
});
console.log(accounts)

uj5u.com熱心網友回復：

您可以創建兩個映射來存盤每個類別的“優先級”，排序結果將是型別優先級之間的差異，如果為 0，則為貨幣的差異：

const accounts = [ { id: 1, type: 'credit', currency: 'GBP' }, { id: 2, type: 'debit', currency: 'EUR' }, { id: 3, type: 'loan' }, { id: 4, type: 'credit', currency: 'RUB' }, { id: 5, type: 'credit', currency: 'RUB' }, { id: 6, type: 'debit', currency: 'USD' }, { id: 7, type: 'debit', currency: 'RUB' }, { id: 8, type: 'external' }, { id: 9, type: 'credit', currency: 'EUR' } ];

const 
 TYPE_PRIORITY = { 'debit': 1, 'credit': 2, 'external': 3, 'loan': 4 },
 CURRENCY_PRIORITY = { 'RUB': 1, 'USD': 2, 'EUR': 3, 'GBP': 4 };
accounts.sort((a, b) => 
  TYPE_PRIORITY[a.type] - TYPE_PRIORITY[b.type] || 
  CURRENCY_PRIORITY[a.currency] - CURRENCY_PRIORITY[b.currency]
);

console.log(accounts);

標籤：javascript

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