Regexp.newbie?

ruby-talk
1

i've got a whole file to scan...but can't get neatly get the last
occurance with...
  .scan(/(^A.*?)^A/m){|a| stops<<$1} ...yes i know that last occurance
is not scanned
  because it is succeeded with ^Z line....that's the complication....
  A......
  M.....
  d....
  A....
  r....
  f....
  A....
  .... etc to the last A group....
  A.....
  c....
  t....
  Z.....

   note each ^A group can end only with a new occurance of another A
record or the Z record.which
   is the last record of the file....So? how do make a more eligant Reg
expression to cover this
   situation?

···

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2

Hope there is one solution O.K. for you.

>>>>> Code >>>>>

mylines = <<EOT
A......1
M.....
d....
A....1
r....
f....
A.....1
c....
t....
Z.....
EOT
puts '########## Without last Z-Record ##########'
mylines.scan(/^A.*?(?=^(?:A|Z))/m){|a|puts "#{a}\n----------"}
puts '########## Last Record up to EOF ##########'
mylines.scan(/^A.*?(?=^A|\Z)/m){|a|puts "#{a}\n----------"}
puts '########## Includings last Z-Record ##########'
mylines.scan(/^A.*?(?:(?=^A)|^Z.*$)/m){|a|puts "#{a}\n----------"}

>>>>> Results >>>>>

########## Without last Z-Record ##########
A......1
M.....
d....

···

----------
A....1
r....
f....

----------
A.....1
c....
t....

----------
########## Last Record up to EOF ##########
A......1
M.....
d....

----------
A....1
r....
f....

----------
A.....1
c....
t....
Z.....
----------
########## Includings last Z-Record ##########
A......1
M.....
d....

----------
A....1
r....
f....

----------
A.....1
c....
t....
Z.....

----------

>>>>> End >>>>>

Wolfgang Nádasi-Donner

3

Wolfgang Nádasi-donner wrote:

Hope there is one solution O.K. for you.

>>>>> Code >>>>>

mylines = <<EOT
A......1
M.....
d....
A....1
r....
f....
A.....1
c....
t....
Z.....
EOT
puts '########## Without last Z-Record ##########'
mylines.scan(/^A.*?(?=^(?:A|Z))/m){|a|puts "#{a}\n----------"}
puts '########## Last Record up to EOF ##########'
mylines.scan(/^A.*?(?=^A|\Z)/m){|a|puts "#{a}\n----------"}
puts '########## Includings last Z-Record ##########'
mylines.scan(/^A.*?(?:(?=^A)|^Z.*$)/m){|a|puts "#{a}\n----------"}

...wow...thanx..a whole lot..dave

···

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