更新所有对象值以保留两位小数

Question

我有一个来自 API 的动态响应，它每次都有不同的响应。我需要遍历一个对象数组并找到数字类型的值。然后将它们四舍五入到小数点后两位。在下面的示例中，对象键值每次都可能不同。

来自API的可能回复：

response = [
 {
  case: "abc",
  price: "123.1234",
  manager: "joe black",
  duration: "3456.1231321"
 },
 {
  case: "bbb",
  price: "23.4897987",
  manager: "jill smith",
  duration: "78974.12156464"
 }
]

or

response = [
 {
  case: "apl",
  yield: "90.1209312093",
  average: "100.123,
 },
 {
  case: "ltl",
  yield: "80666.23131313",
  average: "4512.7897987,
 }
]

预期结果：

response = [
 {
  case: "abc",
  price: "123.12",
  manager: "joe black",
  duration: "3456.12"
 },
 {
  case: "bbb",
  price: "23.49",
  manager: "jill smith",
  duration: "78974.12"
 }
]

or

response = [
 {
  case: "apl",
  yield: "90.12",
  average: "100.12,
 },
 {
  case: "ltl",
  yield: "80666.23",
  average: "4512.79,
 }
]

Answer 1

按照建议，您可以使用 Object.entries() 获取数组每个项目中的所有单个 key/value 对。然后您可以遍历这些并测试数字。找到的任何数字都可以四舍五入到小数点后两位，并在原始数组上更新条目。

类似于：

let response = [
 {
  case: "abc",
  price: "123.1234",
  manager: "joe black",
  duration: "3456.1231321"
 },
 {
  case: "bbb",
  price: "23.4897987",
  manager: "jill smith",
  duration: "78974.12156464"
 },
 {
  case: "apl",
  yield: "90.1209312093",
  average: "100.123"
 },
 {
  case: "ltl",
  yield: "80666.23131313",
  average: "4512.7897987"
 }
]

response.forEach(function(r){
  let rValues = Object.entries(r);
  rValues.forEach(function(e){
    // e[0] is the key and e[1] is the value
    let n = Number(e[1]);
    if (!isNaN(n)) {
      r[e[0]] = n.toFixed(2);
    }
  })
})

console.log(response);

Answer 2

您可以使用 map() 遍历数组的所有对象，并使用 Object.keys().forEach 遍历所有键。如果值字符串包含数字，则将所有值解析为浮点数。最后用 toFixed() 舍入浮点数，returns 一个舍入的浮点数转换为字符串。

let response1 = [{
    case: "abc",
    price: "123.1234",
    manager: "joe black",
    duration: "3456.1231321"
  },
  {
    case: "bbb",
    price: "23.4897987",
    manager: "jill smith",
    duration: "78974.12156464"
  }
]

let response2 = [{
    case: "apl",
    yield: "90.1209312093",
    average: "100.123",
  },
  {
    case: "ltl",
    yield: "80666.23131313",
    average: "4512.7897987"
  }
]

function round(array) {
  let rounded = array;
  rounded.map((el) => {
    Object.keys(el).forEach(function(key) {
      if (!isNaN(parseFloat(el[key]))) {
        el[key] = parseFloat(el[key]);
        el[key] = el[key].toFixed(2);
      }
    });
  })
  console.log(rounded);
}

round(response1);
round(response2);

更新所有对象值以保留两位小数

Update all object values to be rounded by two decimals

javascript

arrays

object

rounding