gistfile1.txt

diff --git a/app/lib/p.rb b/app/lib/p.rb
new file mode 100644
index 0000000..96e939c
--- /dev/null
+++ b/app/lib/p.rb
@@ -0,0 +1,67 @@
+module P
+  class PartialApplier < BasicObject
+    attr_reader :target
+
+    def initialize(target)
+      @target = target
+    end
+
+    def respond_to_missing?(method_name, include_private = false)
+      true
+    end
+
+    def method_missing(name, *args, &blk) # rubocop:disable Style/MethodMissingSuper
+      i = args.index(::P) || 0
+      make_args = ->(o) {
+        args.dup.tap { |ary| ary.delete_at(i) }.insert(i, o)
+      }
+      ->(o) do
+        target.method(name).call(*make_args[o], &blk)
+      end
+    end
+  end
+
+  module ModulesAndClasses
+    def partial_applier
+      PartialApplier.new(self)
+    end
+
+    alias P partial_applier
+  end
+
+  module Array
+    def reduce_compose
+      map(&:to_proc).reduce(&:>>)
+    end
+
+    alias P reduce_compose
+  end
+
+  module NiceShorts
+    def respond_to_missing?(method_name, include_private = false)
+      true
+    end
+
+    def method_missing(name, *args, &blk) # rubocop:disable Style/MethodMissingSuper
+      ->(o) { o.method(name)[*args, &blk] }
+    end
+  end
+
+  extend NiceShorts
+
+  unless ::Array.method_defined? :P
+    ::Array.prepend ::P::Array
+  end
+
+  unless Module.method_defined? :P
+    Module.include ModulesAndClasses
+  end
+
+  unless Class.method_defined? :P
+    Class.include ModulesAndClasses
+  end
+
+  unless Object.method_defined? :P
+    Object.include ModulesAndClasses
+  end
+end
diff --git a/test/lib/p_test.rb b/test/lib/p_test.rb
new file mode 100644
index 0000000..b07b0e9
--- /dev/null
+++ b/test/lib/p_test.rb
@@ -0,0 +1,27 @@
+# works?
+require "test_helper"
+
+P.load
+
+class PTest < ActiveSupport::TestCase
+  def example(left, right)
+    [left, right].join(" ")
+  end
+
+  test "api" do
+    io = StringIO.new
+
+    __FILE__.then(&[
+      File.P.open("rb"),
+      :read,
+      P.split("\n"),
+      P.map(&:upcase),
+      :first,
+      P[/([A-Z]+)/, 1],
+      self.P.example("it", P),
+      io.P.write,
+    ].P)
+
+    assert_equal "it WORKS", io.string
+  end
+end