如何使用 Array.prototype.sort() 按两个属性对数组进行排序？ [复制]答案

【问题标题】：How to sort an array using Array.prototype.sort() by two properties? [duplicate]如何使用 Array.prototype.sort() 按两个属性对数组进行排序？ [复制]
【发布时间】：2021-12-20 20:59:36
【问题描述】：

如何使用Array.prototype.sort() 按type 和currency 对数组进行排序：

借方 => 贷方 => 外部 => 贷款

如果同一类型有几种货币，则按以下顺序排列：

卢布 => 美元 => 欧元 => 英镑

我了解如何对数字使用 sort()，但我不了解如何进行这种排序。

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) => {
  
});

【问题讨论】：

标签： javascript

【解决方案1】：

您可以将type 和currency 属性的顺序存储在一个数组中，然后减去索引以确定优先级：

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)

【讨论】：

【解决方案2】：

您可以将对象用于订单并使用逻辑 OR 链接增量。

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);

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【讨论】：

【解决方案3】：

这是最简单的

当 order1 为 0（a 和 b 相同）时，我们使用 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)

【讨论】：

【解决方案4】：

你可以创建两个map来存储每个类别的“优先级”，排序结果是类型优先级之间的差异，如果为0，则为货币的差异：

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);

【讨论】：