ruby - 转储 JSON 对象的首选方法是什么？ to_json、JSON.generate 还是 JSON.dump？

Question

我需要将哈希对象转储到 JSON，我想知道这三个中的哪一个，to_json、JSON.generate 或 JSON.dump，是执行此操作的首选方法。

我已经测试了这些方法的结果，它们是相同的:

> {a: 1, b: 2}.to_json
=> "{\"a\":1,\"b\":2}" 
> JSON.generate({a: 1, b: 2})
=> "{\"a\":1,\"b\":2}" 
> JSON.dump({a: 1, b: 2})
=> "{\"a\":1,\"b\":2}"

Answer 1

来自 docs :

JSON.generate only allows objects or arrays to be converted to JSON syntax. to_json, however, accepts many Ruby classes even though it acts only as a method for serialization

和

[JSON.dumps] is part of the implementation of the load/dump interface of Marshal and YAML.

If anIO (an IO-like object or an object that responds to the write method) was given, the resulting JSON is written to it.