Hide sidebar if post_type is in array

This is more php, but you can use in_array(). Just check if the current post type is in array in $hide_sidebar.

You can do the following

$hide_sidebar = array('example1', 'example2', 'example3'); //hide sidebar on these post types
if ( in_array( get_post_type(), $hide_sidebar ) ) {
    // Do something if the post type is in array
}

or the negative

$hide_sidebar = array('example1', 'example2', 'example3'); //hide sidebar on these post types
if ( !in_array( get_post_type(), $hide_sidebar ) ) {
    // Do something if the post type is not in array
}