Formatting lines in shell script

Shell Programming and Scripting
1

I have a file with the below lines

1521
1522
1523
1524
1525
1526
...
174 lines all numbers like above. I want the above file to appear as below.

1521,1522,1523,1524.....
All the numbers should be separated by comma.

Pls tell me how to do this ....

Thanks in advance.

2 
{ OIFS="$IFS";IFS='
' set $(<file);IFS=",";echo "$*"; IFS="$OIFS";}

Example:

$ cat file
1521
1522
1523
1524
1525
1526

$ { OIFS="$IFS";IFS='
' set $(<file);IFS=",";echo "$*"; IFS="$OIFS";}
1521,1522,1523,1524,1525,1526

With bash:

$ v="$(<file)";echo "${v//
/,}"
1521,1522,1523,1524,1525,1526
3

:mad: Woops, won't work for long lists; disregard.

4

I'll try to redeem myself with something that might work:

var=$(<infile.txt); echo $var | sed 's/ /,/g'

This also seems to work:

echo $(<infile.txt) | sed 's/ /,/g'
5

perl -pi -e 's/^\n/,/' file

if you have a perl on you machine

6

Neither mine.
May be tr and sed would be more appropriate in those cases.

7

Use paste...

paste -s -d "," < file
8

tr command would also help in this regard

tr -s "\n" "," < file_name

9 
sed -n -e ":a" -e "$ s/\n/,/gp;N;b a" file