From: Bernard Kaiflin <bkaiflin.ruby@...>
Date: 2010-11-17T13:43:50+09:00
Subject: Re: please help load from txt

If I have well understood, you want to display one of the names of the 
database, by asking a question at the console. Here is a solution. Note 
that I have little experience with Ruby, and there are plenty of ways to 
do the same thing, especially in Ruby.

class SomeDataProcessing
    Person = Struct.new :name, :last_name, :call_name, :age

    def self.openOn(p_file)
        # this class method is a trick to hide new
        # could be more stuff here
        new(p_file)
    end

    def initialize(p_file)
        @file    = p_file # not necessary if used only once, 
loadData(p_file) instead
        @persons = {} # or Hash.new
        loadData
    end

    def addPerson
        puts "Name of new person ?"
        name = gets.chomp
        # other data
        puts "Age of new person ?"
        age = gets.chomp
        @persons[name] = Person.new(name, # last_name, call_name,
                                    age)
    end

    def choose
        loop do
            puts "Create new ? ( y(es) / l(ist) / n(ame) / q(uit) )"
            answer = gets.chomp.slice(0,1)

            case answer
            when "y"
                addPerson
            when "l"
                listData
            when "n"
                puts "Name of person ?"
                name = gets.chomp
                showData(name)
            when "q"
                exit
            else
                puts "Please anser y[es], l[ist], n[ame] or q[uit]"
                puts ""
            end
        end
    end

    def listData
        @persons.keys.sort.each {|p| showData(p)}
    end

    def loadData
        File.foreach(@file) do |line|
            name, last_name, call_name, age = line.chomp.split(",")
            @persons[name] = Person.new(name, last_name, call_name, age)
        end
    end

    def showData(p_name)
        person = @persons[p_name]

        if person.nil?
        then
            puts "#{p_name} not in file"
            return
        end

        puts "Name: #{person.name} #{person.last_name}"
        puts "Callname: #{person.call_name}"
        puts "Age: #{person.age}"
        puts
    end
end # class SomeDataProcessing

dp = SomeDataProcessing.openOn("data.txt")
dp.choose

...>ruby -w show_data22.rb
Create new ? ( y(es) / l(ist) / n(ame) / q(uit) )
y
Name of new person ?
xyzzzzzzzzz
Age of new person ?
99
Create new ? ( y(es) / l(ist) / n(ame) / q(uit) )
l
Name: name lastname
Callname: callname
Age: age

Name: name2 lastname2
Callname: callname2
Age: age2

Name: xyzzzzzzzzz 99
Callname:
Age:

Create new ? ( y(es) / l(ist) / n(ame) / q(uit) )
n
Name of person ?
name2
Name: name2 lastname2
Callname: callname2
Age: age2

Create new ? ( y(es) / l(ist) / n(ame) / q(uit) )
q

Hope that helps.
Bernard

-- 
Posted via http://www.ruby-forum.com/.