bash: read File into Array

Q: how to read a file into array with bash?

A: use mapfile

example

// file to read
sMimeTypeList="/etc/mime.types";

// create array `aMimeType`
mapfile aMimeType < <(cat "$sMimeTypeList" | grep -v "^$");

// test outputs
echo "${aMimeType[@]}";         # all
echo "100: ${aMimeType[100]}";  # just the 100. entry