2's complement on long hexadecimals
2's complement is originally done on binary numbers, but sometimes you might need a binary 2's complement representation of hexadecimal digits. If a hexadecimal value is »
Paint adjacent boundaries with distinct colors
In my recent A.I. class, I had an assignment where I had to write some code that will paint the countries of Africa with distinct »
Square each element of a Scala list
There are two practical ways to square each element of a list, and return the new list. For example, if we input a List(5, 10) »
Summation with rationals
Given some lower bound a = na/da and upper bound nb/db, write a function that calculates the summation of f(nk/dk), where k is »
Heroku login on a proxy (Windows 7)
I have had some issues logging into Heroku using a company proxy; if you are in the same boat, you might want to try the following »