#!/bin/bash
result=("school/proj_1/file1.txt" "school/proj_1/file2.txt" "school/proj_1/file3.txt")
rx='school/proj_1/(.*)'
for i in "${result[@]}"; do
echo "${i##*/}"
if [[ "$i" =~ $rx ]]; then
echo "${BASH_REMATCH[1]}"
fi
done
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