Added the underscore node_module.

node_modules/underscore/cjs/_createReduce.js

@@ -0,0 +1,30 @@
+var _isArrayLike = require('./_isArrayLike.js');
+var keys = require('./keys.js');
+var _optimizeCb = require('./_optimizeCb.js');
+
+// Internal helper to create a reducing function, iterating left or right.
+function createReduce(dir) {
+  // Wrap code that reassigns argument variables in a separate function than
+  // the one that accesses `arguments.length` to avoid a perf hit. (#1991)
+  var reducer = function(obj, iteratee, memo, initial) {
+    var _keys = !_isArrayLike(obj) && keys(obj),
+        length = (_keys || obj).length,
+        index = dir > 0 ? 0 : length - 1;
+    if (!initial) {
+      memo = obj[_keys ? _keys[index] : index];
+      index += dir;
+    }
+    for (; index >= 0 && index < length; index += dir) {
+      var currentKey = _keys ? _keys[index] : index;
+      memo = iteratee(memo, obj[currentKey], currentKey, obj);
+    }
+    return memo;
+  };
+
+  return function(obj, iteratee, memo, context) {
+    var initial = arguments.length >= 3;
+    return reducer(obj, _optimizeCb(iteratee, context, 4), memo, initial);
+  };
+}
+
+module.exports = createReduce;