StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

PO
text
Body
copied!<p>I don't have an answer for you why the above doesn't work, but I did find a file, <code>/etc/irbrc</code> on my system (OS X - Snow Leopard, Ruby 1.8.7) that does provide a working, persistent history for me. So two pieces of advice: i) check your /etc/irbrc (or equivalent) to make sure that there isn't anything in there that might interfere with your settings, and ii) try out the settings below to see if you can get history working that way.</p> <pre><code># Some default enhancements/settings for IRB, based on # http://wiki.rubygarden.org/Ruby/page/show/Irb/TipsAndTricks unless defined? ETC_IRBRC_LOADED # Require RubyGems by default. require 'rubygems' # Activate auto-completion. require 'irb/completion' # Use the simple prompt if possible. IRB.conf[:PROMPT_MODE] = :SIMPLE if IRB.conf[:PROMPT_MODE] == :DEFAULT # Setup permanent history. HISTFILE = "~/.irb_history" MAXHISTSIZE = 100 begin histfile = File::expand_path(HISTFILE) if File::exists?(histfile) lines = IO::readlines(histfile).collect { |line| line.chomp } puts "Read #{lines.nitems} saved history commands from '#{histfile}'." if $VERBOSE Readline::HISTORY.push(*lines) else puts "History file '#{histfile}' was empty or non-existant." if $VERBOSE end Kernel::at_exit do lines = Readline::HISTORY.to_a.reverse.uniq.reverse lines = lines[-MAXHISTSIZE, MAXHISTSIZE] if lines.nitems > MAXHISTSIZE puts "Saving #{lines.length} history lines to '#{histfile}'." if $VERBOSE File::open(histfile, File::WRONLY|File::CREAT|File::TRUNC) { |io| io.puts lines.join("\n") } end rescue => e puts "Error when configuring permanent history: #{e}" if $VERBOSE end ETC_IRBRC_LOADED=true end </code></pre>

Querying!

Guidance

An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload