Reverse-search in IRB.

You can reverse-search through previously entered statements in IRB by pressing Ctrl-R:

~
❯ irb
2.1.6 :001 ❯ def something_complicated(x,y); x + y; end
 =❯ :something_complicated
2.1.6 :002 ❯ quit

~ 10s
❯ irb
(reverse-i-search)`compli': def something_complicated(x,y); x + y; end

Happy hacking!

Written on March 9, 2016 by ryandevilla