javascript - 如何过滤对象数组以匹配列表？

Question

给定 400.000 个大数据，例如:

var data = [
 {
  "kDefinition": "ford stream, wade across", 
  "kMandarin": "shè", 
  "char": "涉", 
  "kCantonese": "sip3", 
  "kJapaneseKun": "WATARU KAKAWARU", 
 }, 
 {
  "kDefinition": "to pierce, to stab; to take", 
  "kMandarin": "jué", 
  "char": "鈌", 
  "kCantonese": "kyut3", 
  "kJapaneseKun": "SASU"
 },
 ...
]

并给出一个与 char 字段匹配的较小 1000 个单位的子集列表:

var list = ['早', '维', '基', '涉', '百', ..., '科', '月']  

如何减少较大的数据以仅保留 list 中存在 obj.char 的 1000 个对象？

编辑: list 和 data 的排序顺序不同。

Answer 1

您可以将 list 数组转换为 Set，然后在过滤器内使用 has() 方法，如 @Amadan 所建议。

var data = [{"kDefinition":"ford stream, wade across","kMandarin":"shè","char":"涉","kCantonese":"sip3","kJapaneseKun":"WATARU KAKAWARU"},{"kDefinition":"to pierce, to stab; to take","kMandarin":"jué","char":"鈌","kCantonese":"kyut3","kJapaneseKun":"SASU"}]
var list = ['早', '维', '基', '涉', '百', '科', '月']  

list = new Set(list)

const result = data.filter(({char}) => list.has(char));
console.log(result)