cheat sheets.

--- rdebug version 5	Tue Jan 15 16:12:21 +0000 2008
+++ rdebug version 9	Mon Oct 27 01:02:51 +0000 2008
@@ -1,181 +1,188 @@
 general Informations and Key shortcuts for Kent Sibilev's great ruby-debug gem.
 http://www.datanoise.com/ruby-debug/, http://rubyforge.org/projects/ruby-debug/
 
 A reference manual for version 0.10.0 is at http://bashdb.sf.net/ruby-debug.html
 
 Installation
 gem install ruby-debug
 
 Usage
 rdebug [options] <script.rb> -- <script.rb parameters>
 
 startup settings:
 rdebug reads its configuration file at startup. 
 create a file ~/.rdebugrc with this content:
 
 set autolist
 set autoeval
 set autoreload
 
 after starting rdebug like: rdebug script/server
 enter 'c' and 'return' for starting up rdebug finally.
 
 Most important commands:
 r[eload], n[ext], c[ont]
 
 ###################################################################
 Commands (available as 'help <command-name>' in active debug mode)
 
 backtrace (alias for where)
 (rdb:1) bt|backtrace
 
 break
 (rdb:1) b[reak] file:line [if expr]
 (rdb:1) b[reak] class(.|#)method [if expr]
           set breakpoint to some position, (optionally) if expr == true
 
 Before version 0.10.0:
 (rdb:1) b[reak]    list breakpoints 
 0.10.0 or later:
 (rdb:1) info b[reak]
 
 catch
 (rdb:1) cat[ch]                 (show catchpoint)
 (rdb:1) cat[ch] <an Exception>  (set catchpoint to an exception)
 
 cont
 (rdb:1) c[ont][ nnn] (run until program ends or hits breakpoint or reaches line
 nnn)
 
 delete
 (rdb:1) del[ete][ nnn] (delete some or all breakpoints)
 
 disable
 (rdb:1) disable BPT-NUM - disable given breakpoint number
 
 display
 (rdb:1) disp[lay] <expression> (add expression into display expression list)
 (rdb:1) disp[lay]              (display expression list)
 
 down
-(rdb:1) down[count] (move to lower frame)
+(rdb:1) down [count] (move to lower frame)
 
 enable
 (rdb:1) enable BPT-NUM - enable given breakpoint number
 
 eval
 (rdb:1) e[val] expression evaluate expression and print its value, alias for p.
                     * NOTE - to turn on autoeval, use 'set autoeval'
 
 exit
 (rdb:1) q[uit]  exit from debugger,
 (rdb:1) exit    alias to quit
 
 finish
 (rdb:1) fin[ish] return to outer frame
 
 frame
 (rdb:1) f[rame] frame-number
   Move the current frame to the specified frame number.
   A negative number indicates position from the other end.  
   So 'frame -1' moves to the oldest frame, and 'frame 0' moves to
   the newest frame.
 
 help
 (rdb:1) h[elp]          print help
 (rdb:1) h[elp] command  print help on command
 
 irb
 (rdb:1) irb starts an IRB session. (EXPERIMENTAL)
 
 list
 (rdb:1) l[ist]          list forward
 (rdb:1) l[ist] -        list backward
 (rdb:1) l[ist] =        list current line
 (rdb:1) l[ist] nn-mm    list given lines
 
 method
 (rdb:1) m[ethod] i[nstance] <obj>       show methods of object
 (rdb:1) m[ethod] <class|module>         show instance methods of class or module
 
 next
 (rdb:1) n[ext][+][ nnn] step over once or nnn times,
                   '+' forces to move to another line
 
 p
-p(rdb:1)  expression    evaluate expression and print its value
+(rdb:1)  p expression    evaluate expression and print its value
 
 pp
 (rdb:1) pp expression   evaluate expression and pretty-print its value
 
+ps
+(rdb: 1) ps array - print array in columnized sorted order (e.g. &quot;ps
+Kernel.methods&quot;)
+
+putl
+(rdb: 1) putl array - print array in columnized order
+
 quit
 (rdb:1) q[uit]  exit from debugger,
 (rdb:1) exit    alias to quit
 
 reload
 (rdb:1) r[eload]        forces source code reloading
 
 restart
 (rdb:1) restart|R [args]
 Restart the program. This is is a re-exec - all debugger state
 is lost. If command arguments are passed those are used.
 
 save
-(rdb:1) save FILE       saves current breakpoints and catchpoint as a script
+(rdb:1) save [FILE]      saves current breakpoints and catchpoint as a script
 file
 
 Before 0.10.0:
 (rdb:1) script FILE     executes a script file
 After 0.10.0 (to be gdb compatible):
 (rdb:1) source FILE     executes a script file
 
 set
 (rdb:1) set <setting>
 where <setting>:
   args           - argument list to give program being debugged when restarted
   autolist       - execute 'list' command on every breakpoint
   autoeval       - evaluate every unrecognized command
   autoreload     - enables automatic source code reloading
   autoirb        - debugger invokes IRB on every stop
   listsize       - number of source lines to list by default
   trace          - display stack trace when 'eval' raises exception
   framefullpath  - frame will display full file names
   frameclassname - frame will display class names
   forcestep      - make sure 'next/step' commands always move to a new line
   width          - number of characters the debugger things are in aline
 
 To disable setting, use 'no' prefix, like 'noautolist' or "off" as in
 "autolist off"
 
 step
 (rdb:1) s[tep][ nnn]    step (into methods) once or nnn times
 
 thread
 (rdb:1) th[read] l[ist]                 list all threads
 (rdb:1) th[read] [sw[itch]] <nnn>       switch thread context to nnn
 (rdb:1) th[read] stop <nnn>             stop thread nnn
 (rdb:1) th[read] c[ur[rent]]            show current thread
 (rdb:1) th[read] resume <nnn>           resume thread nnn
 
 trace
 (rdb:1) tr[ace] (on|off)        set trace mode of current thread
 (rdb:1) tr[ace] (on|off) all    set trace mode of all threads
 
 undisplay
 (rdb:1) undisp[lay][ nnn]       delete one particular or all display expressions
 
 up
 (rdb:1) up[count]       move to higher frame
 
 var
 (rdb:1) v[ar] const <object>            show constants of object
 (rdb:1) v[ar] g[lobal]                  show global variables
 (rdb:1) v[ar] i[nstance] <object>       show instance variables of object
 (rdb:1) v[ar] l[ocal]                   show local variables
 
 Before 10.0 const can be abbreviated "c", after 10.0 or later you need
-&quot;co&quot; because there is also &quot;var class&quot;.
+&quot;co&quot; because there is also &quot;var class &lt;object&gt;&quot;.
 
 where
 (rdb:1) w[here] display frames