Printing the addressbook RUBY

(6 ratings)

By: math.umd.edu

Now we will learn how to do things with the address book. Especifically, we will learn how to print and how to sort the addressbook.

Added: 23 June 2008 Views: 126

Path : Computers

Programming

Ruby

Keywords: computers programming ruby coder code language print complex address book

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Printing complex structures

You can still type "puts addressbook", but the output is ugly and not very useful (try it and see for yourself). We would rather define our own way of printing its contents.

The addressbook is an array, so we have the Array#each method. Let's start by just printing the first names of the contacts:

addressbook.each do |person|
	puts person["first name"]  
end

This will print:

Melissa
Joe
Sandy

Full names

The next step is to print full names:

addressbook.each do |person|
    first = person["first name"]  
    last  = person["last name"]
    puts first + " " + last
end

Which prints:

Melissa Adams
Joe Smith
Sandy Koh

Phone number:

addressbook.each do |person|
    first = person["first name"]
    last  = person["last name"]
    phone = person["phone"]
    
    puts first + " " + last + ":"  
    puts "    " + phone
end

Output:

Melissa Adams:
    (301) 364-8924
Joe Smith:
    (301) 345-9837
Sandy Koh:
    (301) 354-2975

Address

Finally add the address and a sepparation between the entries.

addressbook.each do |person|

    #  Name and phone.  
    first = person["first name"]
    last  = person["last name"]
    phone = person["phone"]

    puts first + " " + last + ":"
    puts "    " + phone
   

    # Address
    street = person["address"]["street"]  
    city   = person["address"]["city"]
    state  = person["address"]["state"]
    zip    = person["address"]["zip"]

    puts "    " + street
    puts "    " + city
    puts "    " + state + ", " + zip


    # A blank line to sepparate entries.  
    puts ""
end

Which produces:

Melissa Adams:
    (301) 364-8924
    23 St George St.
    Silver Spring
    MD, 20465

Joe Smith:
    (301) 345-9837
    43 Main St. W
    Washington
    DC, 29847

Sandy Koh:
    (301) 354-2975
    324 Campus Dr.
    College Park
    MD, 23659