OK. Here's some background. I have one file that is a csv(tab separated) that has a url on each line ( ${array1} ). I have another file that has a single word per line ( ${array2} ).

I got to the point where I have both of these files stored into arrays.

What I am trying to do is replace every instance of a word in $array1 ( .* ) (yes it is actually that, not the regexp) with the first item in $array2 and then save that replacement to a new csv file, then do the same thing for the next item in $array2 until there is a file for each item in $array2. Is this possible?

I was thinking something like my pseudocode below, I just don't know if there is a syntax for something like that.

n=0
while [ $n -lt $array2count ]; do
replace every instance of .* in ${array1} with ${array2[$n]}
save textreplaced $array1 to ${array2[$n]}template.csv
bring ${array1} back to its original state
((n++))
done

You don't provide example input and example output so it's hard to know what you want and what the limitations are. Also, I'd strongly suspect this isn't the right way to go about it, but I don't have a better suggestion at the moment. Is this anything like what you had in mind?
This isn't at all robust (the input data here doesn't need to be quoted and file1 and file2 are the same length and so on) but might give you something you can work with.