How to format irb command prompt

Question

Previously I was using Ruby 1.8 and my irb command prompt used to look like this:

Air ~: irb
>> a = 1
=> 1
>> b = 2
=> 2
>&         


        

Answer 1

To avoid giving the prompt you wish on the command line all the time, you can configure the prompt via the ~/.irbrc config file:

$ echo "IRB.conf[:PROMPT_MODE] = :DEFAULT" > ~/.irbrc
$ irb
irb(main):001:0> quit
$ echo "IRB.conf[:PROMPT_MODE] = :SIMPLE" > ~/.irbrc
$ irb
>> quit
$