Shell Programming and Scripting

Code:

gawk 1 RS='+\n' ORS='' file

good one, but it does not work when the consecutive lines have '+'. Also, can you please explain the logic behind this, if possible?

In that case you can use a while loop:

Code:

awk '{while(sub(/\+$/,"")){ getline a; $0=$0 " " a; }}{print}' file

[code] #!/bin/bash declare -i flag flag=0 while read -r LINE do case "$LINE" in *+) LINE="${LINE%+*}" printf "%s " $LINE flag=1 continue esac [[ $flag == 1 ]] && echo "$LINE" && flag=0 [[ $flag == 0 ]] && echo "$LINE" done

---------- Post updated at 05:15 AM ---------- Previous update was at 05:12 AM ----------

Code:

#!/bin/bash

declare -i flag
flag=0
while read -r LINE
do
  case "$LINE" in
   *+)
    LINE="${LINE%+*}"
    printf "%s " $LINE
    flag=1
    continue
  esac
  [[ $flag == 1 ]] && echo "$LINE" && flag=0
  [[ $flag == 0 ]] && echo "$LINE"
done <"myfile"

Awesome!! could you please explain me the logic??
What is the difference between 'getline' and 'next' in awk?

If a line ends with a "+" sign the sub function returns a 1. In that case we get the next line, store it in the variable a, appends it to the previous line ($0) and try to substitute the next "+" ...and so on.

After a getline command, awk continues with the next statement after the getline command but after a next command awk continues with the first statement of the awk program.