Barbaric #succ

succ

###############################################################################
#                                                                             #
# Returns the successor to str. The successor is calculated by incrementing   #
# characters starting from the rightmost alphanumeric (or the rightmost       #
# character if there are no alphanumerics) in the string. Incrementing a      #
# digit always results in another digit, and incrementing a letter results in #
# another letter of the same case. Incrementing nonalphanumerics uses the     #
# underlying character set’s collating sequence.                              #
#                                                                             #
# If the increment generates a “carry,” the character to the left of it is    #
# incremented. This process repeats until there is no carry, adding an        #
# additional character if necessary.                                          #
#                                                                             #
# "abcd".succ        #=> "abce"                                               #
# "THX1138".succ     #=> "THX1139"                                            #
# "<<koala>>".succ   #=> "<<koalb>>"                                          #
# "1999zzz".succ     #=> "2000aaa"                                            #
# "ZZZ9999".succ     #=> "AAAA0000"                                           #
# "***".succ         #=> "**+"                                                #
#                                                                             #
###############################################################################

"succ".succ
"succ".upcase.succ
"9000".succ
"codez".succ
"999".succ
"zzz".succ
"Zzz".succ
" ".succ
"\u007F".succ
"succ ".succ
"a9".succ
"0z".succ
"09".succ
"az".succ
"a 9".succ
"0 z".succ
"0 9".succ
"a z".succ

c="\u0000";90.times{c.succ!};c