line-based `hexdump -C` like thing

line_based_hexdump_c.rb

puts $_.chars.map {|c| if !/\A[[:graph:]]\z/.match(c) then c = "" end; "%2s" % c }.join(" ")
puts $_.chars.map {|c| "%02x" % c.ord }.join(" ")

usage.sh

$ git remote -v | ruby -lan line_based_hexdump_c.rb                                                            
 o  r  i  g  i  n     h  t  t  p  s  :  /  /  g  i  t  h  u  b  .  c  o  m  /  k  r  /  h  k     (  f  e  t  c  h  )
6f 72 69 67 69 6e 09 68 74 74 70 73 3a 2f 2f 67 69 74 68 75 62 2e 63 6f 6d 2f 6b 72 2f 68 6b 20 28 66 65 74 63 68 29
 o  r  i  g  i  n     h  t  t  p  s  :  /  /  g  i  t  h  u  b  .  c  o  m  /  k  r  /  h  k     (  p  u  s  h  )
6f 72 69 67 69 6e 09 68 74 74 70 73 3a 2f 2f 67 69 74 68 75 62 2e 63 6f 6d 2f 6b 72 2f 68 6b 20 28 70 75 73 68 29