notes3/tryruby.org.rb at master · avjgit/notes3 · GitHub

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# http://tryruby.org/levels/1/challenges/3

require 'fileutils.rb'

string = "Jimmy"
p string.reverse
p string.length
p string * 5
p 40.to_s.reverse
p "1".to_i
array = [12, 47, 35]
p array
p array.max
ticket = array
p ticket.max
p ticket.sort! #self-changin method
poem = "My toast has flown from my hand
And my toast has gone to the moon.
But when I saw it on television,
Planting our flag on Halley's comet,
More still did I want to eat it"
p poem
poem['toast'] = 'honeydew' #search and replace
p poem # just first "toast" occurence changed!
p poem.reverse
p poem.lines.to_a.reverse # or poem.bytes, poem.chars
p poem.lines.to_a.reverse.join # "join", or to_s
p poem.include? "my hand"
p poem.downcase
# poem.delete #?


books = {}
books["Gravity's Rainbow"] = :splendid # "symbol"
books["Pelevin's first"] = :quite_good
books["Pelevin's last"] = :mediocre
books["Mr.Feinman"] = :splendid # "symbol"
books["Life of Pi"] = :quite_good
books.length
p books["Gravity's Rainbow"] #:splendid
p books.keys
p books.values
ratings = Hash.new(0)


books.values.each {|rate| ratings[rate] += 1}
p ratings
5.times {print "Odelay!"}

p Dir.entries "/"
p Dir["/*.txt"]
p File.read("/asdf.txt")

FileUtils.cp('/asdf.txt', '/ruby/asdf.txt')
File.open("/ruby/asdf.txt", "a") do |f|
	f << "\nsome other comic: http://google.com"
end

p File.read("/ruby/asdf.txt")
p File.mtime("/ruby/asdf.txt")
p File.mtime("/ruby/asdf.txt").hour

def load_comics(path)
	comics = {} # shortcut for Hash.new
	File.foreach(path) do |asdf|
		name, url = asdf.split(": ")
		# stripping extra spaces in strings
		comics[name] = url.strip
	end
	comics
end

comics = load_comics("/ruby/asdf.txt")

p comics

comics.each do |comic, url|
	p "If you wanna read " + comic + ", go to " + url
end

class BlogEntry
	#!accessors
	attr_accessor :title, :time, :fulltext, :mood
end

entry = BlogEntry.new
entry.title = "First blogpost!"
entry.time = Time.now
entry.mood = :sick
entry.fulltext = "I can't believe Mt. Hood was stolen! I am speechless!
It was stolen by a giraffe who drove away in his Cadillac Seville very nonchalant!!"

p entry

class BlogEntry
	def initialize(title, mood, fulltext)
		@time = Time.now
		@title, @mood, @fulltext = title, mood, fulltext
	end
end

entry2 = BlogEntry.new("About Hoodie", :confused, "aasdas dasdfasfd")

blog = [entry2, entry]

p blog
blog.sort_by! {|entry| entry.time}.reverse
p blog

p blog.find_all {|entry| entry.fulltext.match(/cadillac/i)}

blog << BlogEntry.new("Another post", :neutral, "today is Saturday")
blog << BlogEntry.new("Yet another post", :neutral, "today is Saturday, again")

p blog.map {|entry| entry.mood}

p Time.now

# rails
# p Time.now - 2.weeks