* 时间复杂度：O(n)，空间复杂度：O(n)
use wasm_bindgen::prelude::wasm_bindgen;，更多细节参见PDF资料
Reddit’s Shadow，更多细节参见PDF资料
But Beagle Bros must have been doing something right if there is still a living, elaborate catalog of their works online, 40+ years later. Jeff Atwood also argued in 2015 that it was more than just fun – or that “fun” itself can give back in great ways: