Clear shortcuts from Alt+Fn keys in GNOME

clear-gnome-altfn-shortcuts.sh

#!/bin/bash
# Inspiration from: http://askubuntu.com/questions/126817/how-to-disable-alt-f1-alt-f2-shortcuts

unset -v _key _value _schema
_schema='org.gnome.desktop.wm.keybindings'

while IFS= read -r _key; do
    _value="$(gsettings get "$_schema" "$_key")"
    while [[ "$_value" =~ \''<Alt>F'[1-9]\' ]] || [[ "$_value" =~ \''<Alt>F1'[0-2]\' ]]; do
        #_value="$(sed -e "s/\(, \)\?${BASH_REMATCH[0]}\(, \)\?//;s/''/', '/;" <<<"$_value")"
        _value=${_value/"${BASH_REMATCH[0]}"}
        _value=${_value/, ,/,}
        _value=${_value/, ]/]}
        _value=${_value/[, /[}
        gsettings set "$_schema" "$_key" "$_value"
        printf -- 'Set "%s:%s" to "%s"\n' "$_schema" "$_key" "$_value" ;
    done
done < <(gsettings list-keys "$_schema")

unset -v _key _value _schema

exit 0