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##Library Challenge ###Week 1 Ruby challenge

This is a simulation for a library system. A person can borrow books from the library. The library can lend books which are available.

###Prerequisite

• Ruby version : 2.2.3 This project uses Ruby 2.2.3 in the Gemfile. So you need to have Ruby 2.2.3 installed in your system.

$rvm list

So if you currently use Ruby 2.3.0, you can switch to Ruby 2.2.3 by the following command.

$rvm use 2.2.3

###User stories

#####This Library program has the following user stories:

As an individual
In order to get my hands on a good book
I would like to see a list of books currently available in the library
with information about the title and author

As a library
In order to have good books to offer to the public
I would like to be able to have a collection of books

As a library
In order to have good books to offer to the public
I would like to be able to allow individuals to check out a book

As a library
In order to make the books available to many individuals
I would like to set a return date on every check out
and I would like that date to be 1 month from checkout date

As an individual
In order to avoid awkward moments at the library
I would like to know when my book is supposed to be returned

###How to use the program in irb

• Step 1: Go to the terminal in your Mac or Linux and start the irb with the following command

$irb

• Step 2: Load YAML because it is used for loading the data files in yml formatted

> require 'yaml'

• Step 3: Load the person.rb files

> load './lib/person.rb'

• Step 4: Create a new person instance. Two books are loaded into the person's bookshelf.

> person = Person.new

• Step 5: Create a new library instance. Books are loaded into the library.

> library = Library.new

• Step 6: Let the person check out a book 'Alfons och soldatpappan'

> person.checkout(title:'Alfons och soldatpappan', lib:library)

• Step 7: Show the person's bookshelf has got the book 'Alfons och soldatpappan'

> puts person.bookshelf

• Step 8: Return the book. The amount of books on the bookshelf should become 2, which is shown in the output.

> person.return_book(title:'Alfons och soldatpappan', 'lib':library)