Re^2: Resetting pos() within a RegEx?

But if I'm allowed to execute code, than the constraint "do it in a single regexp" isn't a constraint at all.

So here we go with 3 regexps and no code execution (exept for initializing and printing):

$_="x" x 30;
s:xx:$' $`$&\n:g;
s:(?<=\n).*:$&$`$`:s;
s/xx(?=(x*)(\1) )/ /g;
print;
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s$$([},&%#}/&/]+}%&{})*;#$&&s&&$^X.($'^"%]=\&(|?*{%
+.+=%;.#_}\&"^"-+%*).}%:##%}={~=~:.")&e&&s""`$''`"e

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Re^3: Resetting pos() within a RegEx? by LanX (Saint) on Jan 11, 2009 at 17:44 UTC
Still many bytes, but I really like your approach of taking the postmatch to indend the substitution! =) like this it's quick and easy to get the triangular part of the tree!!! DB<<70>> $_=$"x15;s: :$'#$`$`#\n:g;print ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # DB<<71>> $_=$"x15;s: :$_=$`;y/ /#/;"$'$_$_\n":ge;print ## #### ###### ######## ########## ############ ############## ################ ################## #################### ###################### ######################## ########################## ############################ [download]	[reply] [d/l]

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Re^3: Resetting pos() within a RegEx?
by LanX (Saint) on Jan 11, 2009 at 17:44 UTC

like this it's quick and easy to get the triangular part of the tree!!!

  DB<<70>> $_=$"x15;s: :$'#$`$`#\n:g;print
              ##
             #  #
            #    #
           #      #
          #        #
         #          #
        #            #
       #              #
      #                #
     #                  #
    #                    #
   #                      #
  #                        #
 #                          #
#                            #


  DB<<71>> $_=$"x15;s: :$_=$`;y/ /#/;"$'$_$_\n":ge;print

             ##
            ####
           ######
          ########
         ##########
        ############
       ##############
      ################
     ##################
    ####################
   ######################
  ########################
 ##########################
############################
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