如何处理一个 1.5G 的 json

随便在网上找了个数据

{
  "a": {
    "b": [
      {
        "id": 301940,
        "slug": "ef4f2422125f",
        "nickname": "说",
        "avatar_source": "asdfsd",
        "total_likes_count": 28553,
        "total_wordage": 1373341,
        "is_following_user": false,
        "ob": {
          "a": 1,
          "b": 2
        }
      },
      {
        "id": 3950651,
        "slug": "ca5b9d6f94dc",
        "nickname": "三屿",
        "avatar_source": "asdf",
        "total_likes_count": 3625,
        "total_wordage": 169200,
        "is_following_user": false
      }
    ]
  },
  "total_count": 35932
}

我想用 js 来做，前面有几位仁兄说我的 stream-json 用的不对，我又回去改了改，发现还是不好用，我觉得我是哪块用的不对，我怎么才能只处理里面的 b 层数据，因为那个是数组，也是我需要的，谢谢

我的代码如下，正在找方法拿里面的 b

const { chain } = require("stream-chain");
const { streamObject } = require("stream-json/streamers/StreamObject");
const { streamArray } = require("stream-json/streamers/StreamArray");
const Pick = require("stream-json/filters/Pick");
const fs = require("fs");

const pipeline = chain([
  fs.createReadStream("./small.json"),
  // fs.createReadStream("./big.json"),
  Pick.withParser({ filter: "a" }),
  streamObject(),
  // streamArray()
]);

pipeline.on("data", data => {
  console.log(data);
});
pipeline.on("end", () =>
  console.log(`the end`)
);

解决了 是我的 filter 用的不对, 这是下面一位哥们的代码

const { chain } = require("stream-chain");
const { streamValues } = require("stream-json/streamers/StreamValues");
const Pick = require("stream-json/filters/Pick");
const fs = require("fs");

const pipeline = chain([
  fs.createReadStream("./small.json"),
  Pick.withParser({ filter: /^a\.b\.\d+/ }),
  streamValues()
]);

pipeline.on("data", data => {
    console.log(data);
});

pipeline.on("end", () => {
  console.log(`the end`);
});