Golang-Hash Map Project

Golang Hash Map Project

Building

1. Download joeljunstrom's go-luhn library

go get -t github.com/HauptJ/go-luhn

2. Build the executible

go build

Running

1. File input

./Golang-Hash-Table input.txt

2. STDIN

./Golang-Hash_table
<Text>
CRTL+D

Testing

go test

Design

1. Why Golang?

• Golang is simple backend programming language that is used in many distributed computing applications such as Kubernetes, Docker, Packer, and Terraform. I like Go's philosophy of keeping the language as simple as possible, as well as the fact that it hs the performance beneifits of a compiled language.

2. Why a Hash Map?

• I noticed that the goal of this project was to update and to keep track of the balances of specified card holders by their names. In order to optimize lookup time, I felt a hash map would serve this purpose best because of its constant O(1), lookup time. For the keys, I decided to use the cardholders name, and for the values, I decided to use an object that kept track of the card's spending limit, current balance, as well as its validity.

3. Why joeljunstrom's go-luhn library?

• I noticed he had created a well documented and tested Luhn 10 library in Golang and instead of having to re-invent the wheel, I decided to use his library.