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Re^4: get data from the database -CGI

by mjscott2702 (Pilgrim)
on Nov 10, 2010 at 09:19 UTC ( [id://870527]=note: print w/replies, xml ) Need Help??


in reply to Re^3: get data from the database -CGI
in thread parsing a txt file

Fair enough, so I did, using the following: 
while(<DATA>) {
   print if (/line1/ ... /line5/);
}

__DATA__
line1
line2
line3
line4
line5

[download]

Outputs all the lines, including the start and end "markers". So, unless I am doing something wrong, I don't see how this is any different from the .. operator I have used in the past (at least under 5.8)?

Reason I didn't just try it (which I should have anyway, admittedly) is that I thought myself and others would benefit from a little further explanation.

Guess it's RTFM time for me...

Replies are listed 'Best First'.
Re^5: get data from the database -CGI
by mjscott2702 (Pilgrim) on Nov 10, 2010 at 09:22 UTC
    OK, from perlop:

    If you don't want it to test the right operand till the next evaluation, as in sed, just use three dots ("...") instead of two. In all other regards, "..." behaves just like ".." does.

    Not really sure what the difference is, so I'll stick with my normal two dot approach.

[reply]
      This is the difference:
      $ yes | nl | perl -ne 'print if /00/../0/' | head -n20
   100  y
   200  y
   300  y
   400  y
   500  y
   600  y
   700  y
   800  y
   900  y
  1000  y
  1001  y
  1002  y
  1003  y
  1004  y
  1005  y
  1006  y
  1007  y
  1008  y
  1009  y
  1100  y
$ yes | nl | perl -ne 'print if /00/.../0/' | head -n20
   100  y
   101  y
   200  y
   201  y
   300  y
   301  y
   400  y
   401  y
   500  y
   501  y
   600  y
   601  y
   700  y
   701  y
   800  y
   801  y
   900  y
   901  y
  1000  y
  1001  y

      [download]
[reply]
[d/l]

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