nagachika · May 8, 2019 07:09 · May 8, 2019
diff --git a/unbound-method-example.rb b/unbound-method-example.rb
@@ -0,0 +1,26 @@
+module M
+  def foo
+    puts "deinfed?(foo) => #{defined?(foo).inspect}"
+    puts "method(:foo) => #{method(:foo) rescue $!}"
+    p self
+  end
+end
+
+a = "str-a"
+a.extend(M)
+m = a.method(:foo)
+
+puts "===== m.call ====="
+m.call
+puts "=========="
+
+ubm = m.unbind
+
+b = "str-b"
+puts "===== ubm.bind(b).call ====="
+ubm.bind(b).call
+puts "=========="
+
+puts "===== ubm.bind(42).call ====="
+ubm.bind(42).call
+puts "=========="
diff --git a/z-result.txt b/z-result.txt
@@ -0,0 +1,15 @@
+===== m.call =====
+deinfed?(foo) => "method"
+method(:foo) => #<Method: "str-a".foo>
+"str-a"
+==========
+===== ubm.bind(b).call =====
+deinfed?(foo) => nil
+method(:foo) => undefined method `foo' for class `String'
+"str-b"
+==========
+===== ubm.bind(42).call =====
+deinfed?(foo) => nil
+method(:foo) => undefined method `foo' for class `Integer'
+42
+==========