#!/usr/bin/ruby

puts "Hello, Ruby, what is your name?"

$name = STDIN.gets

puts "Hi, I am "+$name

def welcome(name,a = 9,b = 9,*c)

    puts "Hi #{name}"

    c.each{|x| print "#{x}"}

#    print "a = "+ $a

    a = 10; b = 11

#    print "Hi, b" + $b

    res = a * b

end

#welcome("RUBY")

puts welcome "ruby",3,6,7,8

x = 100000000000000000000

puts "#{x}  " + x.class.to_s

puts "Hello".upcase()

s = "shit"; f = "fuck"

s,f = f,s

arr = [1, 2, s, f]

puts arr[2]

puts arr[-1]

puts arr.inspect

#Hash Table

cars = {

    'altima' => 'Nissan',

    'camry' => 'Toyota',

    'rx7' => 'Mazda'

}

cars['v'] = 'Volkswagon'

puts cars['rx7']

p cars['v']

#puts *.inspect 缩写

p cars

#each 迭代

toppings = Hash["pancakes","syrup","Pizza","Pepper","Cereal","Sugar"]

toppings.each{|name, price| puts "#{name} points to #{price}"}

myToppings = toppings.select{|name, price| price > "Pepper"}

p myToppings.inspect

#using of ..[] and ...[)

('a'..'g').each{ |letter| print letter }

puts

('a'...'g').each{ |letter| print letter }

puts