Question

我想做的就是每当找到要查找的元素时创建一个数组（以我的情况为例）。元素的第一次出现应放置在第一个数组中，第二个出现在第二个数组中，依此类推。最后，在将所有元素放置在单独的数组中之后，我将它们推入主数组。

是否可以动态创建具有不同名称的数组，例如Bank_1，Bank_2等？这是正确的方法吗？

var bankcontainer = [];
var bank = [];

for (let i = 0; i < length ;i++)
{
 let bankname = data.periods[0].decisions[i].bank;
  bank[i] = [];
  bank[i].push(bankname);
  bankcontainer.push(bank);
}

示例：

// Input:    
[{ bank: "team1" }, { bank: "team2" }, { bank: "team3" }]

// Result:
{ bank_1: ["team1"], bank_3: ["team3"], bank_3: ["team3"] }

Answer 1

const data = [{ bank: "team1" }, { bank: "team2" }, { bank: "team3" }]

console.log(
  Object.fromEntries(
    data.map(
      (v, i) => [`bank_${++i}`, v.bank]
    )
  )
)

Answer 2

使用Array.map()迭代数组，并从每个项目创建[key，value]的条目，然后使用Object.fromEntries()转换为对象：

const data = [{ bank: "team1" }, { bank: "team2" }, { bank: "team3" }]

const result = Object.fromEntries(
  data.map((o, i) => [`bank_${i + 1}`, o.bank])
)

console.log(result)

如果不支持Object.fromEntries()，则可以使用Array.reduce()：

const data = [{ bank: "team1" }, { bank: "team2" }, { bank: "team3" }]

const result = data.reduce((r, o, i) => {
  r[`bank_${i + 1}`] = o.bank;

  return r;
}, {})

console.log(result)

Answer 3

这将动态创建银行名称

var bankcontainer = [];
var bank = [];

for (let i = 0; i < length ;i++)
{
  let bankname = data.periods[0].decisions[i].bank;
  const bank["bank_" + i] = [];
  bank["bank_" + i].push(bankname);
  bank = bank["bank_" + i];
}
bankcontainer.push(bank);

Answer 4

是的，有可能：

const myBanks = {};
const banks = ['BofA', 'Goldman Sachs', 'Stackoverflow Credit Union', 'Chase', 'Captial One 360'];

for (let i = 0; i < banks.length; i++)
{
  myBanks['Bank_' + i] = [banks[i]];
}

console.log(myBanks);

Answer 5

const input = [{ bank: "team1" }, { bank: "team2" }, { bank: "team3" }];
const result = {};
input.forEach(
    (item, i) => { 
        result[`bank_${i +1}`] = [item.bank]; 
    }
);
console.log(result);

Answer 6

map（）可在此处用于如下操作对象：

let data = [{ bank: "team1" }, { bank: "team2" }, { bank: "team3" }];

newData = data.map((item, index) => {
return {['bank_' + index] : [item.bank]}
})

console.log(newData);

Answer 7

对数据运行forEach并使用索引创建动态键，请参见下文：

    let data = [{ bank: "team1" }, { bank: "team2" }, { bank: "team3" }];
    let newData = {};
     data.forEach((item, index) => {
    newData['bank_' + (index+1)] = [item.bank];
    })

    console.log(newData);

如何在JavaScript中动态创建数组/数组名

7 个答案: