zhuangxm/clj-rpc — comment on commit 7c46514fc34da66d73822f39f8275c9888678498
File: src/clj_rpc/user_data.clj line 71
By robertluo:

```clojure
(defn clean-timeout-data [data now timeout]
(remove data (fn [[k {last-visit :last-visit}]] (> (- now last-visit) timeout))))
```
将函数变为简单的纯函数。下面的函数就可以直接 swap!