IRB Snippets for the #railsgirls Prague workshop

austen.rb

require 'open-uri'

# Otevreme soubor z Project Gutenberg, Jane Austen, "Pride and Prejudice"
#
file = open('http://www.gutenberg.org/cache/epub/1342/pg1342.txt')

# Nacteme soubor jako text
#
text = file.read

# puts text

puts text.length                        # Pocet vsech znaku v textu
puts text.delete(' ').length            # Pocet znaku bez mezer
                                        
puts text.split("\n").length            # Pocet radek
puts text.split(". ").length            # Pocet vet (hruby)
puts text.split(/\. |\? |! /).length    # Presnejsi pocet vet 
                                        
puts text.split(' ').length             # Pocet slov
puts text.split(' ').uniq.length        # Pocet jedinecnych slov
puts text.split(' ').uniq.sort          # Seznam jedinecnych slov podle abecedy

irb_snippets.rb

"banana".reverse
[1, 14, 7, 3].max
["banana", "lemon", "ananas"].size
["banana", "lemon", "ananas"].sort
["banana", "lemon", "ananas"].sort.last
["banana", "lemon", "ananas"].sort.last.capitalize

print ["banana", "lemon", "ananas"].sort.last.capitalize

5.times do
  print "Hello "
end

1 + 1
"1" + "1"
2 + 2 * 5
(2 + 2) * 5
"Ahoj" + "Ruby"
"Ahoj" + " " + "Ruby"
"Ahoj" + 2

name = "Brno"
puts "Vita vas mesto #{name}"

# Find largest number

input = [3, 6, 9, 1]
largest = input.shift
input.each do |i|
  largest = i if i > largest
end

print "Nejvyssi cislo je: #{largest} \n"

# "Shortcut" (Array#max)

largest = [3, 6, 9, 1].max

print "Nejvyssi cislo je: #{largest} \n"

a = [ 'jedna', 'dve', 'tri' ]
a[0]

book = { :jmeno => "Franz", :prijmeni => "Kafka", :nazev => 'Promena' }
book[:nazev]

["jedna", "dve", "tri"].each do |slovo|
  puts "* " + slovo
end