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

我需要将一个哈希对象转储到 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}"

解决方法

从 docs开始：

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.