javascript - 如何从另一个 JS 数组创建新的 JS 数组

Question

我想从一个对象创建新的 JS 数组。我解释了我的情况如下。

数组1:

const arr1 = [
  {CODE: "PPM", YARN: 1987, EXP: "IUYT", CARD: "MMN"},
  {CODE: "SSW", YARN: 4500, EXP: "NBVC", CARD: "MMN"},
  {CODE: "YTR", YARN: 0740, EXP: "NBVC", CARD: "MMN"},
  {CODE: "NNH", YARN: 1540, EXP: "MHYT", CARD: "MMN"}
]

数组2:

const arr2 = [
  {PRICE: 6354, CODE: "SSW", WARN: "NBVC"},
  {PRICE: 8637, CODE: "NNH", WARN: "MHYT"},
]

预期输出:

output = [
  {CODE: "SSW", YARN: 4500, EXP: "NBVC", CARD: "MMN"},
  {CODE: "NNH", YARN: 1540, EXP: "MHYT", CARD: "MMN"}
]

说明:

我想比较arr1和arr2。如果 arr1.code 包含 arr2.code 它应该位于新数组中。这意味着arr1.code[2] = 'SSW'。 SSW 包含在 arr2.code[0] 中。那么 arr1.code[2] 应该在新数组中。与arr1.code[3] = 'NNH'相同。 NNH 包含在 arr2.code[1] 中。

尝试过的代码:

console.log(arr1.filter(({ CODE: code1 }) => arr2.some(({ CODE: code2 }) => code2 === code1));

当我尝试上面的代码时，出现错误

Error in render: "TypeError: Cannot read property 'price' of undefined"

帮我解决这个问题。

Answer 1

const arr1 = [
  {CODE: "PPM", YARN: 1987, EXP: "IUYT", CARD: "MMN"},
  {CODE: "SSW", YARN: 4500, EXP: "NBVC", CARD: "MMN"},
  {CODE: "YTR", YARN: 0740, EXP: "NBVC", CARD: "MMN"},
  {CODE: "NNH", YARN: 1540, EXP: "MHYT", CARD: "MMN"}
]

const arr2 = [
  {PRICE: 6354, CODE: "SSW", WARN: "NBVC"},
  {PRICE: 8637, CODE: "NNH", WARN: "MHYT"},
]

console.log(arr1.filter(({
    CODE: code1
}) => arr2.some(({
    CODE: code2
}) => code2 === code1))**)**;

我猜您可能错过了 console.log 语句中的括号 )。但是，您仍然没有在代码中使用 price 关键字。可能是其他问题。可以分享一下完整的功能吗？