insert text in the same line after a tab

[Anand_30]

Hi,

I have a file which has a single column. I need to enter some text on the same line after a tab. That is I need to create a second column based on some condition.

for example if my first column has a number '1234', I would enter 'abcd' in the same line delimited by a tab.

Can anyone please help me to accomplish this task.

Thanks,
Andy.

[RAC_1]

something like this.

for i in `cat "your_file"`
do
if [ $i == "1234" ]
then
echo "$i abcd" >> /tmp/new_file
else
echo $i >> /tmp/new_file
fi

note in statement echo "$i abcd" >> /tmp/new_file, there is tab between $i and abcd.

[RAC_1 · Accepted solution]

I just tried it myself. Few corrections.

for i in `cat "your_file"`
do
if [ $i = "1234" ]
then
echo "$i abcd" >> /tmp/new_file
else
echo $i >> /tmp/new_file
fi
cat /tmp/new_file|sort -u > /tmp/final.txt
done

note in statement echo "$i abcd" >> /tmp/new_file, there is tab between $i and abcd.

[curt larson_1]

you could do

cat file | sed -e 's/^abc/& def/'

between & and def is your tab or ^I character

or

cat file | awk '/^abc/ {printf("%s\tdef\n",$0);next;}{print;}'

[H.Merijn Brand (procura]

# perl -pe'BEGIN{%t=qw(1234 abcd 2345 defg 2536 gshe 5623 blah)}m/^\s*(\d+)\b/&&exists$t{$1}and s/\t/\t$t{$1}/' file

Enjoy, Have FUN! H.Merijn

[curt larson_1]

or

ex -s +"1,$ s/^abc/& def/ | wq" yourfile

Procura,
why not just,

perl -pe 's/^(1234)/$1\tabcd/;' fileName

[H.Merijn Brand (procura]

curt, because he said "for example", and "based on some condition"

My solution entered 4 (random) conditions, but leaves it wide open to add many more without too much hassle

I like generic solutions based on the problem stated.

Enjoy, Have FUN! H.Merijn