Ruby

Sissejuhatus

Ruby see on imelihtne ehk lihtsaid käske-skripte ja muud vajalikku millega mängida ja midagi kokku klopsida. Ehk süntaksi õpe jms meenutused

Alustada võib ühe koleda lausega

puts "Hello, world!"

IO jaoks on hulk toredaid käske nagu..

gets, open, print, printf, putc, puts, readline, readlines

#!/usr/local/bin/ruby
print "Enter your name: "
name = gets

Jadatöötlus

ary = [1, 2, 3]
puts ary[0]

cities  = %w[ London
              Oslo
              Paris
              Amsterdam
              Berlin ]
visited = %w[Berlin Oslo]

puts "I still need " +
     "to visit the " +
     "following cities:",
     cities - visited

Stringitöötlus

herb = "parsley"
puts herb[0,1]
puts herb[0..3]

Random funktsioon

puts rand(10)

saame suvalise numbri 0-10

for num in (0..100)
    print num,"\n"
end

Lihtne tsükkel nullist sajani

topelt tsükkel

#!/usr/local/bin/ruby
  1.upto(10) do |fg|
    1.upto(10) do |bg|
      print "1"
    end
  puts
  end

Shelli värvid

puts " \e[32mROHELINE\e[0m"

värvitabel, asjalik-vajalik

[0, 1, 4, 5, 7].each do |attr|
  puts '----------------------------------------------------------------'
  puts "ESC[#{attr};Foreground;Background"
  30.upto(37) do |fg|
    40.upto(47) do |bg|
      print "\033[#{attr};#{fg};#{bg}m #{fg};#{bg}  "
    end
  puts "\033[0m"
  end
end

#!/usr/bin/env ruby
require 'pathname'
 Pathname.new($0).realpath()

#!/usr/bin/env ruby
ARGV.each do|a|
  puts "Argument: #{a}"
end

./arg.sh ahaa
Argument: ahaa

failid

File.open("file", "r") do |io|
    # do something with io
end

File.open("/location/of/my/file.txt", "r") do |f|
 while ! f.eof do
  line = f.gets
  puts line #Print the line to the screen
 end
end

DNS

Skript esitab domeeninimele vastavad ip aadressid

require 'resolv'

Resolv::DNS.new.each_address("www.loomaaed.tartu.ee") do |addr|
  puts "www.loomaaed.tartu.ee A kirje: " + addr.to_s
end

Kasulikud lisamaterjalid

• http://www.ruby-doc.org/docs/ruby-doc-bundle/UsersGuide/rg/index.html
• http://www.elctech.com/articles/ruby-daemons-and-angels ruby ja deemonid
• http://www.phptoruby.com/ php ja ruby süntaksi teisendused