Merge lines with Awk - Awk Snipplr Social Repository

Revision: 29951

at August 7, 2010 10:20 by bubnoff

Updated Code

REGEX="/^[^|]/"
func_merge_lines "$REGEX" $TMP1 $TMP2
 
function func_merge_lines
{
     awk --re-interval "NR==1 \
               { s=\$0;next } \
          "$1"{ s=s\$0;next } \
     { print s;s=\$0 } END {if(s)print s}" $2 > $3 # merge lines. 
                                                   # Looks for lines not starting with pipe
                                                   # then merges line below to end.
}

Revision: 29950

at August 5, 2010 10:17 by bubnoff

Initial Code

REGEX="/^[^|]/"
func_merge_lines "$REGEX" $TMP1 $TMP2
 
function func_merge_lines
{
     awk --re-interval "NR==1 \
               { s=\$0;next } \
          "$1"{ s=s\$0;next } \
     { print s;s=\$0 } END {if(s)print s}" $2 > $3 # merge lines. 
                                                   # Looks for lines starting with pipe
                                                   # then merges line below to end.
}

Initial URL

Initial Description

For use in bash script. First two lines are an example of usage. This is one of several solutions to this problem. Works well for cleaning database output. Takes a regex and two files as arguments - first one is raw db output - second is merged output.This assumes unwanted line breaks. You can also get the same results working with the newline characters -- will post that one as well. The --re-interval option is only necessary if you want to enable regex interval operators like {n} or {n,m} ....etc. If using a current version of GNU Awk, might as well leave it in there.

Initial Title

Merge lines with Awk

Initial Tags

Bash

Initial Language

Awk

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