get allowed permissions

//pseudo mysql query
all_permissions = query("SELECT id, name FROM Permissions")
// it returns all_permissions = [
                                   [1, "start_class"],
                                   [2, "end_class"],
                                   [3, "submit_assignment"],
                                   [4, "evaluate_assignment"]
                                ]
allowed_permissions = []
// pseudo code to evaluate allowed_permissions
// permissions_status = "0010" as in step 2
for (i=0 -> permissions_status.length){
    if (permissions_status[i] === "1") {
        allowed_permissions.push(all_permissions[i+1]);
        // since index of string starts from 0
    }
}
// it returns allowed_permissions = ["submit_assignment"]