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`); });