前置き
Ruby の REPL ではもう irb じゃなく pry を使うのがフツーになってると思います。
ただ、非常に多機能なため、ほとんどの機能を使わずに利用していることが多いと思います。
pry の機能をくわしく紹介してくださってるのが
なのですが、やはり多機能すぎて、あまり良く見渡せない。
もっと簡単な地図は無いのか。
本編
すごく単純な事なのですが、やはり help にはそのコマンドの簡単な内容が載ってますよね。
私自身が今まで見たことが無かったのに、今回見てみたら簡潔に纏まっていたので、ご紹介したいと思ったわけです（といってもやはり多いですねw）。
以下のメッセージは
[1]pry(main)> help
で返ってくるものを若干編集したものです。
1. Help
help Show a list of commands or information about a specific command.
2. Context
cd Move into a new context (object or scope).
find-method Recursively search for a method within a class/module or the current namespace.
ls Show the list of vars and methods in the current scope.
pry-backtrace Show the backtrace for the pry session.
raise-up Raise an exception out of the current pry instance.
reset Reset the repl to a clean state.
watch Watch the value of an expression and print a notification whenever it changes.
whereami Show code surrounding the current context. (Alias: @)
wtf? Show the backtrace of the most recent exception.
3. Editing
/^\s*!\s*$/ Clear the input buffer.
amend-line Amend a line of input in multi-line mode.
edit Invoke the default editor on a file.
hist Show and replay readline history. (Alias: history)
play Playback a string variable, method, line, or file as input.
show-input Show the contents of the input buffer for the current multi-line expression.
4. Introspection
ri View ri documentation.
show-doc Show the documentation for a method or class. (Alias: ?)
show-source Show the source for a method or class. (Alias: $, show-method)
stat View method information and set _file_ and _dir_ locals.
5. Gems
gem-cd Change working directory to specified gem's directory.
gem-install Install a gem and refresh the gem cache.
gem-list List and search installed gems.
gem-open Opens the working directory of the gem in your editor.
6. Commands
import-set Import a pry command set.
install-command Install a disabled command.
7. Input and output
.<shell command> All text following a '.' is forwarded to the shell.
cat Show code from a file, pry's input buffer, or the last exception.
change-inspector Change the current inspector proc.
change-prompt Change the current prompt.
fix-indent Correct the indentation for contents of the input buffer
list-inspectors List the inspector procs available for use.
list-prompts List the prompts available for use.
save-file Export to a file using content from the repl.
shell-mode Toggle shell mode. bring in pwd prompt and file completion. (Alias: file-mode)
8. Misc
gist Upload code, docs, history to https://gist.github.com/.
clipit Alias for `gist --clip`
pry-version Show pry version.
reload-code Reload the source file that contains the specified code object. (Alias: reload-method)
toggle-color Toggle syntax highlighting.
9. Navigating pry
!pry Start a pry session on current self.
disable-pry Stops all future calls to pry and exits the current session.
exit Pop the previous binding. (Alias: quit)
exit-all End the current pry session. (Alias: !!@)
exit-program End the current program. (Alias: !!!, quit-program)
jump-to Jump to a binding further up the stack.
nesting Show nesting information.
switch-to Start a new subsession on a binding in the current stack.
10. Prompts
simple-prompt Toggle the simple prompt.
gist コマンドなんて初めて見ました。