Friday, February 29, 2008
Split a line into lines - AWK or SED
We can use "jot" to print A-Z like below:
$ jot -c 26 A | tr '\n' ' '
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
The required Output:
A B C D
E F G H
I J K L
M N O P
Q R S T
U V W X
Y Z
i.e in one line, 4 alphabets.
Solution:
4 alphabets means including spaces, its 8 characters in one line.
$ jot -c 26 A | tr '\n' ' ' | sed -e "s/.\{8\}/&\n/g"
One solution using AWK:
$ jot -c 26 A | tr '\n' ' ' | awk 'BEGIN{n=1}{while(substr($0,n,8)){print substr($0,n,8);n+=8}}'
A B C D
E F G H
I J K L
M N O P
Q R S T
U V W X
Y Z
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3 comments:
Great stuff :-)
Thanks!
awk split helped me.
Actually in this particular
scenario, using "sed" can avoid
heavy lifting...
echo "A B C D ... Z" |
sed -e 's/[ ]/\n/4;P;D'
The '4' gives the 4 chars/line.
YMMV.
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