如何使用 javascript 在 foreach() 中进行函数调用

Question

我想知道如何使用 javascript 在 forEach() 中进行函数调用。下面的函数工作正常，但由于 indoTransCalc和doFundCalc，计算是相似的，有没有其他方法可以做到这一点。var objFund = [{  "sucess": "true",  "id": "fund",  "options": "others",  "fee": 3,  "tax": 0.3,  "amount": 2000}]var objTrans = [{  "sucess": "true",  "id": "trans",  "options": "service",  "fee": 2,  "tax": 0.4,  "amount": 1000}]function doTransCalc(trans) {  trans.forEach(e => {    if (e.success) {      e.rate = 2.0,        e.netFee = e.fee + e.tax,        e.amountwithfee = e.amount + e.netfee,        e.total = e.amountwithfee * e.rate;    }  })}function doFundCalc(fund) {  fund.forEach(e => {    if (e.success) {      e.rate = 4.0,        e.addfee = 10,        e.netFee = e.fee + e.tax,        e.amountwithfee = e.amount + e.netfee,        e.total = e.amountwithfee * e.rate;    }  })}doTransCalc(objTrans);doFundCalc(objFund);console.log(objTrans);console.log(objFund);

Answer 1

你可以用一个函数来完成，并用 ES6 特性调用你的列表。

const fundList = [{

  "success": "true",

  "id": "fund",

  "options": "others",

  "fee": 3,

  "tax": 0.3,

  "amount": 2000

},

{

  "success": "true",

  "id": "fund",

  "options": "others",

  "fee": 3,

  "tax": 0.3,

  "amount": 2000

}]

const transList = [{

  "success": "true",

  "id": "trans",

  "options": "service",

  "fee": 2,

  "tax": 0.4,

  "amount": 1000

},

{

  "success": "true",

  "id": "trans",

  "options": "service",

  "fee": 2,

  "tax": 0.4,

  "amount": 1000

}]

function calc(e, rate, addFee) {

  const netFee = e.fee + e.tax;

  const amountwithfee = e.amount + netFee;

  return {

    rate: rate,

    addfee: addFee ? addFee : null,

    netFee,

    amountwithfee,

    total: amountwithfee * rate

  }

}

const newTransList = transList.filter(e => e.success === 'true').map(e => calc(e, 2));

console.log(newTransList);

const newFundList = fundList.filter(e => e.success === 'true').map(e => calc(e, 4, 10));

console.log(newFundList);