In a text file, ignoring any trailing whitespace at the end of each line, I assume that if a line is not ended with a digit, then there is a line break between the line and the next line, and I would like to find these line breaks and then concatenate them into one line. For example
line 1
li
ne 2
There is a line break between the second and the third lines and I should modify the file to be
line 1
line 2
To find such line breaks, I need to do multiline matching. I does it by changing record separator, but the following doesn't work:
$ awk 'BEGIN{RS="";}; { if (match($0, /[^[:digit:] ] *\n/)) print $0;} ' inputfile
To concatenate two lines separated by a line break, I am still wondering.
Thanks.
Best Answer
You could run something along the lines of
RS=SUBSEP
sets the Register Separator to a value that is never present in a text file (slurps the input file to$0
)