#89: view readline history in irb

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on April 01, 2010, 06:53 PM UTC   —   from   148c663fd665c53518538e093ce3c2ab_small kueda    ( 2,835 views )
I wanted to view a log of all the lines I'd written in an IRB session, but didn't see a simple equivalent of bash's "history" command.
Tags: irb ruby history
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Readline::HISTORY

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- 148c663fd665c53518538e093ce3c2ab_small kueda on April 01, 2010, 06:53 PM UTC

puts Readline::HISTORY.to_a

Comments

  1. Beautiful! Thanks!

     — John on January 18, 2013, 08:57 PM UTC

  2. If you want to wrap it up, add this to your ~/.irbrc file (which gets loaded before your irb sessions):

    def irb_history( count = nil )
    hist = Readline::HISTORY.to_a

    if count
    len = hist.length
    from = len - count
    from = 0 if from < 0
    puts "len: #{len}, count: #{count}, from: #{from}, hist.class: #{hist.class}, hist.length: #{hist.length}"

    hist[from..-1]
    else
    hist
    end
    end

    I'm not sure how the formatting will work.

     — Bryce on June 23, 2014, 09:02 PM UTC
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References

http://tagaholic.me/2005/10/08/irb-history-itches-eliminated.html - found by 148c663fd665c53518538e093ce3c2ab_small kueda on April 01, 2010, 07:01 PM UTC