io - What is the best way to get keyboard events (input without press 'enter') in a Ruby console application? -

i've been looking answer in internet while , have found other people asking same thing, here. post presentation of case , response "solutions" have found.

i such new in ruby, learning purposes decided create gem, here. trying implement keyboard navigation program, allow user use short-cuts select kind of request want see. , in future, arrow navigations, etc.

my problem: can't find consistent way keyboard events user's console ruby.

solutions have tried:

1. highline gem: seems not support feature anymore. anyway uses stdin, keep reading.
2. stdin.getch: need run in parallel loop, because @ same time user can use short-cut, more data can created , program needs show it. , well, display formated text in console, (rails log). when loop running, text lost format.
3. curses: cool need set position(x,y) display text every time? confusing.

here trying it. may note using "stty -raw echo" (turns raw off) before show text , "stty raw -echo" (turns raw on) after. keeps text formated.

but key listener loop not working. mean, works in not consistent. if press key twice don't work anymore , stops alone too.

let me put 1 part of code here:

    def run     # 2 loops run in parallel using threads.     # stream_log loops normal stream in file, parser text.     # break requests , store in @requests_queue.     # stream_parsed_log stream inside @requests_queue , shows in screen.     @requests_queue = queue.new     @all_requests = array.new     # it's not working yet.     thread.new { listen_keyboard }     thread.new { stream_log }     stream_parsed_log   end    def listen_keyboard     # not finished     loop       char = stdin.getch       case char       when 'q'         puts "exiting."         exit       when 'a'         @types_to_show = ['get', 'post', 'put', 'delete', 'asset']         requests_to_show = filter_to_show(@all_requests)         command = true       when 'p'         @types_to_show = ['post']         requests_to_show = filter_to_show(@all_requests)         command = true       end       clear_screen if command       @requests_queue += requests_to_show if command       command = false     end   end 

i need light in path, should do?

that 1 mistake. it's logic error in part of code running in thread ruby don't shows error default. used ruby -d , realized wrong. mistake messing keyboard input.

so it's fixed , using stdin.getch no problem. turn raw mode off before show string. , ok.

you can check here, or in gem itself.

that's it.