How do I remove the line break from alternate lines in an ASCII file

问题

I have an ASCII file that contains data as follows

    459999XXX9998882      WTD CCD           3,500.00-         0.00         3,500.00-         0.00       0.00
       09/07/17  23:00:07   999999999999 000000000000 EONCO024 GTUR BR              AND PARDES  APIN
    459999XXX9998883      WTD CCD             400.00-         0.00           400.00-         0.00       0.00
       09/07/17  23:00:12   999999999999 000000000000 EOMCO015 P.G ROAD, ANNA HOT SECU  TLIN
    29999XXX99988829      INQ CCD               0.00          0.00             0.00          0.00       0.00
       09/07/17  23:00:41   999999999999 000000000000 EOMCO010 PUNA KUMBHARIA ROAD,   SUR        GJIN
    5459999XXX999888   INQ SAV               0.00          0.00             0.00          0.00       0.00    UNABLE TO PROC
       09/07/17  23:00:44   999999999999 000000000000 EONCO089 CTS NO 3985/5 ST STAND SOL      MHIN

I would like lines containing the dates to be contactenated to the line above it. Essenatilly I would like to remove all the line breaks from odd numbered lines. So the result is something like this

459999XXX9998882      WTD CCD           3,500.00-         0.00         3,500.00-         0.00       0.00 09/07/17  23:00:07   999999999999 000000000000 EONCO024 GTUR BR              AND PARDES  APIN
459999XXX9998883      WTD CCD             400.00-         0.00           400.00-         0.00       0.00 09/07/17  23:00:12   999999999999 000000000000 EOMCO015 P.G ROAD, ANNA HOT SECU  TLIN
29999XXX99988829      INQ CCD               0.00          0.00             0.00          0.00       0.00 09/07/17  23:00:41   999999999999 000000000000 EOMCO010 PUNA KUMBHARIA ROAD,   SUR        GJIN
5459999XXX999888      INQ SAV               0.00          0.00             0.00          0.00       0.00    UNABLE TO PROC 09/07/17  23:00:44   999999999999 000000000000 EONCO089 CTS NO 3985/5 ST STAND SOL      MHIN

I tried the solution provided here but then it removed all the linebreaks resulting in one single line! Would appreciate any ideas.

回答1:

Print each line, alternating between a tab and a newline as the Output Record Separator ORS:

awk '{ ORS = NR % 2 ? "\t" : "\n" } 1' file

NR is the current record (line) number, so NR % 2 is true on odd-numbered lines.

Obviously, the tab "\t" can be changed to whatever you want to put between the lines that you're joining together.

回答2:

sed 'N;s/\n/ /' ip.txt

N add next line to pattern space
s/\n/ / change first newline character to space (or whatever is the separator)
Usage of \n might depend on sed implementation. This was tested on GNU sed

With perl, change newline character if line number is odd

perl -pe 's/\n/ / if $.%2' ip.txt

Can also use

xargs -d'\n' -n2 -a ip.txt

-d'\n' newline character as delimiter
-n2 two lines together as argument (space is used to combine them)

回答3:

You can use command

awk 'NR % 2 == 1 { printf $0; getline; print $0 }' filename

Which means "for every odd line print it without '\n', get next line, print it with '\n'".

来源：https://stackoverflow.com/questions/45412782/how-do-i-remove-the-line-break-from-alternate-lines-in-an-ascii-file

标签

awk

sed