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Full Discussion: Can this be made into one single line?
Top Forums Shell Programming and Scripting Can this be made into one single line? Post 28571 by Perderabo on Friday 20th of September 2002 08:40:56 AM
Old 09-20-2002
Like Optimus_P, I don't understand why the OP is ignoring my solution to his problem. For the record, when the above input data is run against my script, it outputs:
Code:
Line: 20 At position 1 2 unmatched characters
Line: 20 At position 3 MATCH: rrrgds
Line: 20 At position 9 43 trailing characters
pvRRRGDSrgsllsprpvsylkgssggpllcpfghavgifraavctrgva


Line: 49 At position 1 39 unmatched characters
Line: 49 At position 40 MATCH: rhrars
Line: 49 At position 46 6 trailing characters
iierlhglsafslhsyspgeinrvasclrklgvpplrvwRHRARSvrarl

I then joined all of the lines together into one superline. And I commented out the 'echo "$image"' in my script so that it won't print out the line with matches upshifted. When the superline is run against my script, it outputs:
Code:
Line: 1 At position 1 952 unmatched characters
Line: 1 At position 953 MATCH: rrrgds
Line: 1 At position 959 289 unmatched characters
Line: 1 At position 1248 MATCH: rgrfvt
Line: 1 At position 1254 1186 unmatched characters
Line: 1 At position 2440 MATCH: rhrars
Line: 1 At position 2446 65 trailing characters

So I got one more match. This explains the motivation for trying to join the lines. I think a better solution is to modify the scripts to find matches across line boundaries. Eliminating the line boundaries is hard and neither of the solutions posted worked very well.

The data file has 2510 letters. That exceeds the maximum line that vi can handle, at least on HP-UX. So vi didn't work. As for the tr solution, I tried:
tr -s "\n" < file1 > file2
which kinda worked, but it left the file with no newline characters at all. Thus the file had zero lines. I used:
echo >> file2
to correct this problem.

At this point, my script worked and spit out the above results, but at some point, ksh will balk at reading a giant line. That's why switching to an algorithm that can match across line boundaries would be the better approach.
 

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LEARN ABOUT DEBIAN

gifpos

gifpos(1)						      General Commands Manual							 gifpos(1)

NAME

       gifpos  - A program to change GIF screen size and/or reposition images.	No test is made to make sure changes will generate valid GIF files
       (i.e. images are still confined to screen etc.)

USAGE

       gifpos [-q] [-s Width Height] [-i Left Top] [-n n Left Top] [-h] gif-file

       If no gif-file is given, GifPos will try to read a GIF file from stdin.

MEMORY REQUIRED

       Line.

OPTIONS

       [-q]

	       Quiet mode.  Default off on MSDOS, on under UNIX.  Controls printout of running scan lines.  Use -q- to invert.

       [-s Width Height]

	       Set the new screen dimensions, so for example `-s 1000 800' will set screen to width of 1000 and height of 800.

       [-i Left Top]

	       set image relative to screen position, so for example `-i 100 80' will set image left position to 100 and top position to 80.  This
	      sets the position of the first image only.

       [-n n Left Top]

	       set image n relative to screen position, so for example '-n 3 100 80' will set the third image position as in 2.

       [-h]

	       Print one line of command line help, similar to Usage above.

AUTHOR

       Gershon Elber

       Man page created by T.Gridel <tgridel@free.fr>, originally written by Eric S. Raymond <esr@thyrsus.com>

								   giflib-tools 							 gifpos(1)
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