【Ruby】Ruby大法第一天

 1 ojs = {}
 2 ojs["poj"] = :A
 3 ojs["hdu"] = :A
 4 ojs["uva"] = :B
 5 ojs["zoj"] = :B
 6 ojs["CF"] = :S
 7 ojs["TC"] = :S
 8 ratings = Hash.new(0)
 9 ojs.values.each { |rate| ratings[rate] += 1 }
10 print ratings
11 puts ""
12 puts "==============================="
13 print ojs
14 puts ""
15 puts "==============================="
16 3.times {print "hey!"}
17 puts ""
18 puts "==============================="
19 
20 print ojs.length
21 puts ""
22 print ojs.keys
23 puts ""
24 print ojs.values
25 puts ""
26 ojs.keys.each { |name| print name; print " "; print ojs[name]; puts ""; }
27 puts "==============================="
28 print File.read("x.txt")
29 puts "==============================="
30 File.open("x.txt", "a") do |f|
31     f << "HACKED!\n"
32     end
33 print File.read("x.txt")
34 puts "==============================="
35 print File.mtime("x.txt")
36 puts ""
37 print File.mtime("x.txt").hour
38 puts ""
39 puts "==============================="

# 读取一个文件的数据库并且输出
def load_oj( path )
    ojs = {}
        File.foreach(path) do |line|
        name, value = line.split(‘:‘)
        ojs[name] = value
    end
    print_oj(ojs)
end
def print_oj( data )
    puts "================================"
    print "name\tvalue\n"
    data.keys.each do |name|
        puts "#{name}\t#{data[name]}"
    end
    puts "================================"
end
oj = load_oj("x.txt")

 1 # 从文件中读取学生信息并且输出
 2 class Student
 3     #attr_accessor :name
 4     #attr_accessor :number
 5     def initialize(name = "Unknown", number = "2012309999")
 6         @name = name
 7         @number = number
 8     end
 9     def print
10         puts "#{@name}\t#{@number}"
11     end
12 end
13 def load_stu( path )
14     data = {}
15     File.foreach(path) do |line|
16         na, no = line.split(‘ ‘)
17         s = Student.new(no, na)
18         data[s] = 1
19     end
20     data
21 end
22 def print_stu( data )
23     puts "================================"
24     print "name\tnumber\n"
25     data.keys.each do |stu|
26         stu.print
27     end
28     puts "================================"
29 end
30 data = load_stu("y.txt")
31 print_stu(data)