From 5d3189fae565458ae5701e7f4fe500150caf3d5f Mon Sep 17 00:00:00 2001
From: Kray-G <nagai.kazuya@gmail.com>
Date: Fri, 5 Mar 2021 21:53:27 +0900
Subject: [PATCH] added a new Functional.

---
 lib/std/kxfunctional.kx | 25 ++++++++++++++++++++++++-
 lib/std/kxstartup.kx    | 10 +++++-----
 2 files changed, 29 insertions(+), 6 deletions(-)

diff --git a/lib/std/kxfunctional.kx b/lib/std/kxfunctional.kx
index 444e9abd0..2fb896a12 100644
--- a/lib/std/kxfunctional.kx
+++ b/lib/std/kxfunctional.kx
@@ -114,4 +114,27 @@ _function _functional_enumerator(e) {
     };
 }
 
-Functional.enumerable = Functional.Enumerator.create = _functional_enumerator;
+Functional.methodMissing = _function(_instance, method, ...a) {
+    Functional[method] = _function(...args) {
+        return _function(obj) {
+            return obj[method](...args);
+        };
+    };
+    return Functional[method](...a);
+};
+
+// The methods in Array such as `map` have to be assigned to this object
+//  because Array.map will have been called directly instead of this.map
+//  and methodMissing will not be called.
+Array.keySet(Array).filter({ => Array[_1].isFunction }).each { &(method)
+    Functional[method] = _function(...args) {
+        return _function(obj) {
+            return obj[method](...args);
+        };
+    };
+};
+
+Functional.enumerable
+    = Functional.Enumerator.create
+    = _functional_enumerator
+    ;
diff --git a/lib/std/kxstartup.kx b/lib/std/kxstartup.kx
index 85a612fed..d727a25c0 100644
--- a/lib/std/kxstartup.kx
+++ b/lib/std/kxstartup.kx
@@ -22,6 +22,11 @@ var Xml, Net;
     Net = _import('kxnet');
     SQLite = _import('kxsqlite');
     Debugger = _import('kxdebugger');
+    using kxsysutil;
+    using kxstring;
+    using kxarray;
+    using kxbinary;
+    using kxnumeric;
     using kxisolate;
     using kxexception;
     using kxsqlite;
@@ -29,11 +34,6 @@ var Xml, Net;
     using kxnet;
     using kxenumerable;
     using kxfunctional;
-    using kxsysutil;
-    using kxstring;
-    using kxarray;
-    using kxbinary;
-    using kxnumeric;
     using kxfile;
     using kxgetopt;
     Zip.create = File._zipCreate;