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  #1 (permalink)  
Old 07-11-2007
thaduka thaduka is offline
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merging two lines in a file
Hi All,

I want to merge two lines in a file till the end of the file. So what could be the command to get so.

say file name : sample.txt
contents:
country=1
send apps =1 rece=2
country=2
send apps =3 rece=3
..

...


output:
country=1;send apps =1 rece=2
country=2;send apps =3 rece=3

thanks
Kumar
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Old 07-11-2007
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vino vino is offline Forum Staff  
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Here is one way.

Code:
while read line
do
  OUT=${line}
  read line
  OUT=${OUT};${line}
  echo ${OUT} >> output.txt
done <input.txt
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Old 07-11-2007
hemangjani hemangjani is offline
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Smile
Code:
awk 'ORS=NR%2?";":"\n"' sample.txt
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Old 07-11-2007
syndex syndex is offline
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Quote:
Originally Posted by hemangjani View Post
Code:
awk 'ORS=NR%2?";":"\n"' sample.txt
Could explain the awk line.

I'm so confused on awk and sed. Is there a good tutorial that explains what all that gibberish means?
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Old 07-11-2007
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Shell_Life Shell_Life is offline
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Location: Bahia, Brazil
Posts: 695
Vino,
The line:

Code:
OUT=${OUT};${line}

Should be replaced by:

Code:
OUT=${OUT}${line}

Hemangjani,
If the input file has an odd number of records, your output does not produce
a line break for the last record.

Here is another way:

Code:
typeset -i mLineCnt=0
mOutLine=''
while read mLine
do
  mLineCnt=${mLineCnt}+1
  mOutLine=${mOutLine}${mLine}
  if [ ${mLineCnt} -eq 2 ]; then
    echo ${mOutLine}
    mOutLine=''
    mLineCnt=0
  fi
done < input_file
if [ ${mLineCnt} -ne 0 ]; then
  echo ${mOutLine}
fi
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Old 07-11-2007
vino's Avatar
vino vino is offline Forum Staff  
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Quote:
Originally Posted by Shell_Life View Post
Vino,
The line:

Code:
OUT=${OUT};${line}

Should be replaced by:

Code:
OUT=${OUT}${line}
And where do I introduce the ; as shown in the expected output

country=1;send apps =1 rece=2
country=2;send apps =3 rece=3

I should have double quoted the RHS of OUT=${OUT};${line}
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Old 07-11-2007
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Shell_Life Shell_Life is offline
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Location: Bahia, Brazil
Posts: 695
You are correct, Vino, it should be single or double quoted:

Code:
OUT=${OUT}';'${line}

Since the requirement asked for a semi-colon, mine should have it:

Code:
mOutLine=${mOutLine}';'${mLine}
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