cisp | Minimal Lisp Interpreter | Interpreter library

I am developing a single page application with a REST backend that uses AWS Cognito for user management and authentication.

I have structured it such that when the user enters the page without a token, the following series of steps occur:

1. Redirect to Cognito's default login page
2. The user logs in and is redirected to host/authenticate.html
3. An AJAX call is sent to Cognito's token endpoint, which returns the user's tokens. These are stored in sessionStorage
4. The user is redirected to the web application and is now authenticated

I want to have two user roles in my application: Users and Admins. Users should not be allowed to call any AWS services, where as Admins should be allowed to create/invite and promote other users to admins on behalf of his company.

Currently I have set up an Identity Pool for the User Pool and web application, that enables the admin permissions. I authenticate with the Identity pool using the following code:

I know there are easier ways to do this project. BUT that is not the path our professor wanted us to take. Ergo, I need some assistance.

What I am attempting to do is validate an IP address with four sections, three periods and values between 0 and 255 for each segment. And there is a catch, I have to have THREE methods to do so.

First: Verify three dots and segmentation

Second: Identify that the octet have a valid number between 0 and 255

Third: Identify that it is an integer (Please note this method is not yet implemented because of the current bug. I pretty much understand what to do with this because it was basically our last project.)

Currently as the code is it breaks when I try to validate the number range 0 - 255. I did get it to work validating the periods and segments with the correct amount of numbers but not the total value.

Seems to break where the "for (String f : octet)" starts. It's like it will not carry the octet value down from the other method.

Any help would be greatly appreciated. And thank you in advanced!

So the point of this project is the validate if the user has input a number 0-9 or does it have a decimal. It does validate if it is a number or a letter but if the user doesn't put anything the loop still runs as if it is a valid number.

So, bug one: User hits enter before inputting a valid floating point number and the script still runs as valid.

Bug two: User enters a period without entering any numbers and the script still runs as valid.

I'm taking a C++ course that requires a student header at the top of every submitted file. Typing it or yank/paste-ing is so tedious, I've been working on a script to just add it for me. I've got something that works for me so far, but I just noticed that every \n in any string in the files that it operates on are replaced with an actual newline. I'm guessing this is either a result of the use of cat or echo in the script, and I'm trying to figure out how to avoid that.

The manpage for echo says that the default behavior is to ignore backslash escapes, but I'm not entirely sure how that relates to what I'm trying to do.

My script is:

I have spent a couple hours trying to figure out why this comes back as 0 If someone could help that would be great.