Ruby learning exercises

ex1.rb

+cars = 100
+
+puts "Have #{cars}"
\ No newline at end of file

ex2.rb

+formater = "%{fisrt} %{second} %{third} %{fourth}"
+
+puts formater % {fisrt: 1, second: 2, third: 3, fourth: 4}
+puts formater % {fisrt: 'one', second: 'two', third: 'three', fourth: 'four'}
+puts formater % {fisrt: formater, second: formater, third: formater, fourth: formater}
\ No newline at end of file

ex3.rb

+print "How old are you?"
+age = gets.chomp
+print "How tall are you?"
+height = gets.chomp
+print "How much do you weigh?"
+weight = gets.chomp
+
+puts "#{age} #{height} #{weight}"
\ No newline at end of file

ex4.rb

+first, second, third = ARGV
+
+puts "Your first variable is: #{first}"
+puts "Your second variable is: #{second}"
+puts "Your third variable is: #{third}"

ex5.rb

+user_name = ARGV.first
+prompt = '> '
+
+puts "Hi #{user_name}"
+puts "I would like to ask you a few questions"
+puts "Do you like me #{user_name}"
+puts prompt
+likes = $stdin.gets.chomp
+
+puts "Where do you live #{user_name}?"
+puts prompt
+lives = $stdin.gets.chomp
+
+puts "What kind of computer do you have? ", prompt
+computer = $stdin.gets.chomp
+
+puts """
+Alright, so you said #{likes} about liking me.
+You live in #{lives}.
+And you have a #{computer}
+"""

ex6.rb

+filename = ARGV.first
+
+txt = open(filename)
+
+puts "Here's your file #{filename}"
+print txt.read
+
+print "Type the filename again: "
+file_again = $stdin.gets.chomp
+
+txt_again = open(file_again)
+
+print txt_again.read
\ No newline at end of file

ex6.txt

+Read me please!
\ No newline at end of file

ex7.rb

+filename = ARGV.first
+
+puts "We are going to erase #{filename}"
+
+$stdin.gets
+
+puts "Opening the file..."
+target = open(filename, 'w')
+
+puts "Truncating the file."
+target.truncate(0)
+
+puts "Now I'm going to ask you for three lines"
+
+print "line 1: "
+line1 = $stdin.gets.chomp
+print "line 2: "
+line2 = $stdin.gets.chomp
+print "line 3: "
+line3 = $stdin.gets.chomp
+
+puts "Write these to the file"
+
+target.write(line1)
+target.write("\n")
+target.write(line2)
+target.write("\n")
+target.write(line3)
+
+puts "Close it"
+target.close
\ No newline at end of file

ex7.txt

+line 1
+line 2
+line 3
\ No newline at end of file

ex8.rb

+from_file, to_file = ARGV
+
+puts "Copying from #{from_file} to #{to_file}"
+
+in_file = open(from_file)
+indata = in_file.read
+
+puts "The input file is #{indata.length} bytes long"
+
+puts "Does the output file exist? #{File.exist?(to_file)}"
+puts "Ready, hit RETURN to continue, CTRL-C to abort."
+
+$stdin.gets
+
+out_file = open(to_file, 'w')
+out_file.write(indata)
+
+puts "Alright, all done"
+
+out_file.close
+in_file.close
\ No newline at end of file

ex8.txt

+Ex8 test

ex9.rb

+def print_two(*args)
+  arg1, arg2 = args
+  puts "arg1: #{arg1}, arg2: #{arg2}"
+end
+
+def print_two_again(arg1, arg2)
+  puts "arg1: #{arg1}, arg2: #{arg2}"
+end
+
+print_two(1,2)
+print_two_again(1,2)
\ No newline at end of file

new_ex8.txt

+Ex8 test