3 files changed, 59 insertions, 0 deletions
diff --git a/add-index b/add-index
new file mode 100755
index 0000000..77a7e8d
--- /dev/null
+++ b/add-index
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+
+i = 0
+if ARGV.size > 0
+  i = ARGV[0].to_i
+end
+
+while line = STDIN.gets
+  puts "#{i}\t#{line}"
+  i += 1
+end
+
diff --git a/exclude b/exclude
new file mode 100755
index 0000000..b5fe3cb
--- /dev/null
+++ b/exclude
@@ -0,0 +1,17 @@
+#!/usr/bin/env ruby
+
+require 'zipf'
+require 'set'
+
+to_exclude = {}
+f = ReadFile.new ARGV[0]
+while line = f.gets
+  to_exclude[line] = true
+end
+
+while line = STDIN.gets
+  if not to_exclude.has_key? line
+    puts line
+  end
+end
+
diff --git a/joint-set b/joint-set
new file mode 100755
index 0000000..b9b9b22
--- /dev/null
+++ b/joint-set
@@ -0,0 +1,30 @@
+#!/usr/bin/env ruby
+
+require 'set'
+require 'zipf'
+
+n = ARGV.pop.to_i
+
+all = []
+all_sets = []
+ARGV.each { |file|
+  fp = ReadFile.new file
+  a = []
+  s = Set.new
+  while line = fp.gets
+    a << line
+    s << line
+  end
+  all << a
+  all_sets << s
+}
+
+joint_set = all_sets.pop
+all_sets.each { |set|
+  joint_set &= set
+}
+
+joint_set.each { |i|
+  puts i
+}
+