如何使用Golang解析ndjson文件？

Question

我有一个ndjson (换行符分隔的JSON)文件，我需要解析它并获取一些逻辑运算所需的数据。有没有使用golang解析ndjson文件的好方法？下面给出了一个示例ndjson

{"a":"1","b":"2","c":[{"d":"100","e":"10"}]}
{"a":"2","b":"2","c":[{"d":"101","e":"11"}]}
{"a":"3","b":"2","c":[{"d":"102","e":"12"}]}

Answer 1

编码/ JSON根据值类型使用可选或必需的空格解析连续的Decoder文档。因为换行符是空格，所以解码器处理ndjson。

d := json.NewDecoder(strings.NewReader(stream))
for {
    // Decode one JSON document.
    var v interface{}
    err := d.Decode(&v)

    if err != nil {
        // io.EOF is expected at end of stream.
        if err != io.EOF {
            log.Fatal(err)
        }
        break
    }

    // Do something with the value.
    fmt.Println(v)
}

Run it on the playground。