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string concatenation

 
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# 1  
Old 04-03-2006
string concatenation
my input file contains thousands of lines like below

234A dept of education
9788 dept of commerce
8677 dept of engineering

How do i add a delimeter ':' after FIRST 4 CHARACTERS in a line
234A:dept of education
9788:dept of commerce
8677:dept of engineering
# 2  
Old 04-03-2006
Is the pattern of all the lines in the file the same as the three shown here? If yes, this is how you can do it:
Code:
# cat testfile
234A dept of education
9788 dept of commerce
8677 dept of engineering

# while read first rest; do
> echo $first:$rest
> done < testfile
234A:dept of education
9788:dept of commerce
8677:dept of engineering

# 3  
Old 04-04-2006
awk
you need awk for it.
# 4  
Old 04-04-2006
Can you show me how to do using awk or sed

Yes all the lines are of the same pattern
# 5  
Old 04-04-2006
with sed,
Code:
sed 's/\(....\) \(.*\)/\1;\2/' filename

with awk,
Code:
awk '{ 
for(x=1; x<=NF; x++) 
{
if ( x==1 )
{
  printf $x";";
}
else
{
  printf $x" ";
}
}
printf "\n";
}' filename

# 6  
Old 04-04-2006
Quote:
Originally Posted by systemsb
Can you show me how to do using awk or sed

Yes all the lines are of the same pattern

try the following

Quote:
awk '$1=$1":"{print}' filename
Gaurav
Last edited by gauravgoel; 04-04-2006 at 06:55 AM.. Reason: typo
# 7  
Old 04-04-2006
Quote:
Originally Posted by gauravgoel
try the following
awk '$1=$1":"{print}' filename
Gaurav
and for those working on solaris distribution
use nawk instead of awk
 
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