How to find files based on array

Question

I have an array that contains a list of filenames (without extension) ex:

filearray=("fileA" "fileB" "fileC")

These files are split amongst multiple directories. As I loop through the directories, I would like to perform an operation on the files from the array that are present in each directory. How can I use find or grep with an array?

Can I do something like this?:

Dirarray= ("dirA" "dirB")
for Dir in "${Dirarray[@]}"; do
    cd "$Dir";
    for file in "${filearray[@]}"; do
        if find . -regextype posix-extended -regex "$file"; then;
            do X;
        fi;
     done
done

Thanks!

Answer 1

I would do it in a different way.

Dirarray= ("dirA" "dirB")
for Dir in "${Dirarray[@]}"; do
    cd "$Dir"
    for file in "${filearray[@]}"; do
# Here a change. If "$file" exists...
        if [[ -e "$file"]]; then
            : # do something
        fi
     done
done

See man test for more file test options.

The reason is this way is much more simple. Well, as long as the array doesn't contain regexes.