Arrays

Author: raluka

Arrays/array_methods.rb

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+# each
+
+languages = ['English', 'Romanian', 'Ruby']
+languages.each do |lang|
+  puts 'I love ' + lang + '!'
+  puts 'Don\'t you?'
+end
+puts 'And let\'s hear it for Java!'
+puts '<crickets chirp in the distance>'
+
+# more iterators as integer method
+puts
+
+3.times do
+  puts 'Hip-Hip-Hooray!'
+end
+puts
+
+2.times do
+  puts '...you can say that again...'
+end
+puts
+
+# to_s and join
+
+foods = ['milk', 'bread', 'sugar']
+puts foods
+puts
+puts foods.to_s
+puts
+puts foods.join(', ')
+puts
+puts foods.join(' :) ') + ' 8)'
+200.times do
+  puts []
+end
+puts
+
+# push, pop, and last
+
+favorites = []
+favorites.push 'raindrops on roses'
+favorites.push 'whiskey on kittens'
+
+puts favorites[0]
+puts favorites.last
+puts favorites.length
+
+puts favorites.pop
+puts favorites
+puts favorites.length

Arrays/ex_sorting.rb

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+=begin
+Building and sorting an array. Write a program that asks you to type as many words as you want (one word per line,
+continuing until you just press Enter on an empty line), and then repeat the words back to you in alphabetical order.
+=end
+
+puts 'Type some words and I\'ll sort them for you.'
+words = []
+while true
+  puts 'Write a word or just press Enter to see the result:'
+  response = gets.chomp
+  break if response.empty?
+  words.push(response)
+end
+if words == []
+  puts 'Nothing to sort.'
+else
+  puts 'And there are your sorted words:'
+  puts words.sort.join(', ')
+end
+

Arrays/ex_table_of_contents_ver2.rb

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+=begin
+Table of Contents revisited. Rewrite your table of contents program. Start the program with an array holding all of the
+information for your table of contents(chapter names, page numbers, and so on). Then print out the information from the
+array in a beautifully formatted table of contents.
+=end
+
+title = 'Table of Contents'
+chapters = [['Getting Started', 1], ['Numbers', 9], ['Letters', 13]]
+puts title.center(50)
+chap_number = 1
+chapters.each do |chap|
+  left = 'Chapter ' + chap_number.to_s + ': ' + chap[0]
+  right = 'page ' + chap[1].to_s
+  puts left.ljust(30) + right.rjust(20)
+  chap_number = chap_number + 1
+end