https://xuanji.appspot.com/isicp/
http://sarabander.github.io/sicp/
https://news.ycombinator.com/item?id=13918465
自动补全
/Applications/Racket v6.11/share/pkgs/shell-completion/racket-completion.zsh
SICP
Racket 自带，也可以通过 raco pkg install sicp 来安装
DrRacket
#lang sicp
(#%require sicp-pict)
REPL
(require sicp)
(require sicp-pict)
DrRacket VIM 编辑模式
raco pkg install drracket-vim-tool, 然后在 Edit 菜单中启用 Vim Mode
REPL GPL READLINE
raco pkg install readline-gpl