add hw2

node_modules/ramda/es/internal/_checkForMethod.js

@@ -0,0 +1,24 @@
+import _isArray from "./_isArray.js";
+/**
+ * This checks whether a function has a [methodname] function. If it isn't an
+ * array it will execute that function otherwise it will default to the ramda
+ * implementation.
+ *
+ * @private
+ * @param {Function} fn ramda implementation
+ * @param {String} methodname property to check for a custom implementation
+ * @return {Object} Whatever the return value of the method is.
+ */
+
+export default function _checkForMethod(methodname, fn) {
+  return function () {
+    var length = arguments.length;
+
+    if (length === 0) {
+      return fn();
+    }
+
+    var obj = arguments[length - 1];
+    return _isArray(obj) || typeof obj[methodname] !== 'function' ? fn.apply(this, arguments) : obj[methodname].apply(obj, Array.prototype.slice.call(arguments, 0, length - 1));
+  };
+}