Single character input without pressing 'Enter'

ruby-talk
1

how can i read input from stdin, char by char, i want to get the
character as soon as it is entered, without having to press 'Enter'
after each character.

2

This is a simple way to achieve that. Maybe there are others

def read_char
system "stty raw -echo" STDIN.getc ensure system "stty -raw echo"
end

good luck

unni.tallman wrote:

···

how can i read input from stdin, char by char, i want to get the
character as soon as it is entered, without having to press 'Enter'
after each character.

3

Nguyen Huu Bach wrote:

This is a simple way to achieve that. Maybe there are others

def read_char

   # Save previous state
   old = `stty -g`

system "stty raw -echo"
STDIN.getc
ensure

    system "stty #{old}"

end

good luck

Might be better to use Termios or Curses, though.

···

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4

Or use HighLine which handles all these details for you.

James Edward Gray II

···

On Sep 19, 2006, at 11:33 PM, Eero Saynatkari wrote:

Nguyen Huu Bach wrote:

This is a simple way to achieve that. Maybe there are others

def read_char

   # Save previous state
   old = `stty -g`

system "stty raw -echo"
STDIN.getc
ensure

    system "stty #{old}"

end

good luck

Might be better to use Termios or Curses, though.