Include Ruby exercises as sample code for session

Author: tannerwelsh

session-notes/2015-02-24/ruby-exercises/count_in_list.rb

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+# Method name: count_in_list(list, item_to_count)
+# Inputs:      1. a list of anything, 2. an item for us to count in the list
+# Returns:     The number of times our item is contained in the input list
+# Prints:      Nothing
+#
+# For example,
+#   count_in_list([1,2,3], 1)  == 1
+#   count_in_list([1,2,3], -1) == 0
+#   count_in_list([1,1,1], 1)  == 3
+
+# --- NOTE ---
+# Ruby has a built-in method to do this, but the purpose of this kata is
+# to write it yourself.
+#
+# See: http://www.ruby-doc.org/core-2.1.2/Array.html#method-i-count
+
+def count_in_list(list, item_to_count)
+  # You'll need three things:
+  #  1. A running total of the number of times you've seen the item
+  #  2. A way to loop/iterate through the list
+  #  3. A way to add to the running total as you see the item
+end
+
+if __FILE__ == $0
+  # I'd advise putting some sanity checks here.
+  # How else will you be sure your code does what you think it does?
+end

session-notes/2015-02-24/ruby-exercises/find_links.rb

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+# Method name: find_links
+# Inputs:      A website URL
+# Returns:     An array of all link URLs on the input website
+# Prints:      Nothing
+
+require 'open-uri'
+require 'nokogiri'
+
+# Note #1
+# You'll need to install the nokogiri gem if you haven't, yet.  Run this
+# from the command line to install it:
+#
+#   gem install nokogiri
+#
+# Nokogiri can be difficult to install, so if this doesn't work let us know!
+# The installation messages can also be intimidating, but here's Jesse
+# installing nokogiri on his laptop running OS X 10.9 (Mavericks)
+# http://cl.ly/image/163i3r290m3D
+
+# Here are some tutorials on how to use Nokogiri to do this. Please email us
+# if you're confused about anything in the tutorials.
+#
+#   http://ruby.bastardsbook.com/chapters/html-parsing/
+#   http://lostechies.com/rodpaddock/2011/04/11/hacking-websites-with-ruby-and-nokogiri/
+
+def find_links(url)
+  # This should return an array of all links at the given URL
+end
+
+find_links("http://www.cnn.com/").each do |url|
+  puts url
+end

session-notes/2015-02-24/ruby-exercises/longest_string.rb

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+# Method name: longest_string(list)
+# Inputs:      a list of strings
+# Returns:     the longest string in the list
+# Prints:      Nothing
+#
+# For example, longest_string(["a", "zzzz", "c"]) should return "zzzz" since
+# the other strings are 1 character long and "zzzz" is 4 characters long.
+#
+# To get the length of a string in the variable str, call str.length
+# For example,
+#   str = "zzzz"
+#   str.length == 4
+
+def longest_string(list)
+  # This is your job. :)
+end
+
+if __FILE__ == $0
+  # I'd advise putting some sanity checks here.
+  # How else will you be sure your code does what you think it does?
+end