yoaquim

/*
Exercise:

Write a web based math engine. It should take the form of a running web service 
that takes in a single parameter GET or POST* called “values”, which is a 
JSON-formatted list of numbers. The response should be a JSON dictionary with 
two values, the “sum” and the “product”.

Example input: “values” = [1, 4, 7, -2] (will be either a url param for a GET 
or a post param for POST)

yoaquim

=begin

Exercise:

Write a function that takes a string and returns a rot13 version 
of that string with every other word reversed. If the function is 
f, f(f(x)) should return x.  Remember to take non-alphanumeric 
non-alphanumeric characters into account.

Example Input: “Hello world!”

yoaquim

/*
Exercise:

Write a function that takes in a number N and counts 
how many numbers between 1 and N (inclusive) do not 
contain any digits which are ’7′.
*/


//Recursively, it comes out somewhat nice and clean: