new files

Task/Search-a-list/Ruby/search-a-list-1.rb

@@ -0,0 +1,9 @@
+haystack = %w(Zig Zag Wally Ronald Bush Krusty Charlie Bush Bozo)
+
+%w(Bush Washington).each do |needle|
+  if (i = haystack.index(needle))
+    print i, " ", needle, "\n"
+  else
+    raise "#{needle} is not in haystack\n"
+  end
+end

Task/Search-a-list/Ruby/search-a-list-2.rb

@@ -0,0 +1,7 @@
+haystack.each do |item|
+  last = haystack.rindex(item)
+  if last > haystack.index(item)
+    puts "#{item} last appears at index #{last}"
+    break
+  end
+end

Task/Search-a-list/Ruby/search-a-list-3.rb

@@ -0,0 +1,3 @@
+multi_item = haystack .each_with_index .group_by {|elem, idx| elem} .find {|key, val| val.length > 1}
+# multi_item is => ["Bush", [["Bush", 4], ["Bush", 7]]]
+puts "#{multi_item[0]} last appears at index #{multi_item[1][-1][1]}" unless multi_item.nil?