Re: File position and buffers

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From	Cee Joe <cyril_jose@ymail.com>
Newsgroups	comp.lang.ruby
Subject	Re: File position and buffers
Date	Fri, 29 Apr 2011 10:20:29 -0500
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7stud -- wrote in post #995683:
> If you don't have to use pos(), then see my first post.  At some point,
> you might ask him why he thinks that pos() would be of any help at all!

Thanks jake and 7stud for replying. I tried this in irb for your first 
post:

>> e = File.open("test/test.fasta").enum_for(:each)
=> #<Enumerable::Enumerator:0x1005777a8>
>> $/ = "\n\n"
=> "\n\n"

>Before doing the sub() on buffer2, you will have to check if it's nil:

 >if buffer2.nil?
 >   #don't do a sub()
 > else
 >   #do the sub()
 >end

>> e.each_slice(2) do |buf1, buf2|
?> p buf1, buf2
>> if buf2.nil?
>> puts "Done"
>> else
?> buf2.sub(/\n+ \z/xms, "")
>> end
>> end

Output:
">gi|329299107|ref|NM_2005745.3Acc1| Def1 zgc:65895 (zgc:65895), 
mRNA\nAGCTCGGGGGCTCTAGCGATTTAAGGAGCGATGCGATCGAGCTGACCGTCGCG\n\n"
">gi|329299107|ref|NM_2342343.3Acc2| Def2 zgc:65895 (zgc:65895), 
mRNA\nGTCGCTGGGTCGAAAAGTGGTGCTATATCGCGGCTCGCGTCGATGTCGCGATG\nCGTGCGCGCGAGAGCGCGCTATGATGAAAGGATGAGAGAG\n\n"
">gi|329299107|ref|NM_7453343.5Acc3| Def3 zgc:65895 (zgc:65895), 
mRNA\nCGTGCGGGGABCCGTACGTGCCGTGGGGGTTTAATAGCGCGCCATCTGAGCAG\nTTAGTCGCTGACGCATGCACG\n"
nil
Done
=> nil

It still returns nil, am I doing what you suggested wrong?

-- 
Posted via http://www.ruby-forum.com/.

Thread

File position and buffers Cee Joe <cyril_jose@ymail.com> - 2011-04-27 15:02 -0500
  Re: File position and buffers Jesús Gabriel y Galán <jgabrielygalan@gmail.com> - 2011-04-27 16:47 -0500
  Re: File position and buffers jake kaiden <jakekaiden@yahoo.com> - 2011-04-27 17:33 -0500
  Re: File position and buffers 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-27 19:08 -0500
  Re: File position and buffers 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-27 19:50 -0500
  Re: File position and buffers Robert Klemme <shortcutter@googlemail.com> - 2011-04-28 02:54 -0500
    Re: File position and buffers 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-28 13:06 -0500
      Re: File position and buffers 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-28 13:25 -0500
        Re: File position and buffers Cee Joe <cyril_jose@ymail.com> - 2011-04-28 13:29 -0500
  Re: File position and buffers Cee Joe <cyril_jose@ymail.com> - 2011-04-28 09:06 -0500
  Re: File position and buffers 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-28 12:47 -0500
    Re: File position and buffers Cee Joe <cyril_jose@ymail.com> - 2011-04-28 13:27 -0500
      Re: File position and buffers 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-28 18:31 -0500
        Re: File position and buffers Cee Joe <cyril_jose@ymail.com> - 2011-04-28 20:05 -0500
  Re: File position and buffers 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-28 21:58 -0500
    Re: File position and buffers Cee Joe <cyril_jose@ymail.com> - 2011-04-29 10:20 -0500
  Re: File position and buffers jake kaiden <jakekaiden@yahoo.com> - 2011-04-28 22:36 -0500
  Re: File position and buffers 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-29 12:50 -0500
    Re: File position and buffers Cee Joe <cyril_jose@ymail.com> - 2011-04-29 13:32 -0500
      Re: File position and buffers 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-29 17:45 -0500
  Re: File position and buffers jake kaiden <jakekaiden@yahoo.com> - 2011-04-29 15:38 -0500
  Re: File position and buffers Cee Joe <cyril_jose@ymail.com> - 2011-04-29 16:10 -0500

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