javascript - 计算每个 object.entry 的长度属性

Question

所以我希望能够计算数组中每个对象的属性数量...

    value = [
   0: { personId: "0003678", seniorStatus: "Yes", juniors: "maybe" }, //3
   1: { personId: "0001657", seniorStatus: "No", juniors: "No" }, //3
   2: { personId: "0002345", seniorStatus: "No", juniors: "No", infants: "Maybe" } //4

基本上我想这样做是为了检查是否有变化。如果任何对象中的属性超过 3 个。我知道如何计算对象的数量，在本例中有 3 个。但需要计算其中的属性。如果超过 3 个则返回 true。

我正在努力寻找任何可以通过对象计数问题的东西。如果对答案有用，我正在使用 lodash。

Answer 1

Map数组到 Object.keys() 的长度每个对象并检查是否大于 3:

const values = [{"personId":"0003678","seniorStatus":"Yes","juniors":"maybe"},{"personId":"0001657","seniorStatus":"No","juniors":"No"},{"personId":"0002345","seniorStatus":"No","juniors":"No","infants":"Maybe"}]
   
const result = values.map(o => Object.keys(o).length > 3)

console.log(result)

或者使用 lodash 的 _.size()获取每个对象中的属性数量，然后检查 3 是否小于带 _.lt() 的数量:

const values = [{"personId":"0003678","seniorStatus":"Yes","juniors":"maybe"},{"personId":"0001657","seniorStatus":"No","juniors":"No"},{"personId":"0002345","seniorStatus":"No","juniors":"No","infants":"Maybe"}]
   
const result = values.map(_.flow(
  _.size,
  _.partial(_.lt, 3)
))

console.log(result)

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