Hi All,
I am new to scripting.
I have a requirement where I need to search for token present in array in a file. If the token is found I need to take the first column of that line from the file and append it to token and direct it to a new file.

e.g. token file
token.txt contains

Code:

abc
der
xyz

flat.txt contains

Code:

123 abc
234  der  sgd
345 wse xyz
000 qwe qaws zksd

expected output

Code:

abc 123
der 234
xyz 345

I tried using following code but its not working.

Code:

filearray=( `cat token.txt | tr '\n' ' '`)
 
for ((i=0;i<${#filearray[*]};i++))
{
awk '{for (f=NF; f>=0 ; f--) if ($f ~/${filearray[i]}/) {print  $filearray[i], $1,; next}}' flat.txt} >> newfile.txt
exit

.

Appreciate your help.