Added the underscore node_module.

node_modules/underscore/cjs/underscore-array-methods.js

@@ -0,0 +1,31 @@
+var underscore = require('./underscore.js');
+var each = require('./each.js');
+var _setup = require('./_setup.js');
+var _chainResult = require('./_chainResult.js');
+
+// Add all mutator `Array` functions to the wrapper.
+each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {
+  var method = _setup.ArrayProto[name];
+  underscore.prototype[name] = function() {
+    var obj = this._wrapped;
+    if (obj != null) {
+      method.apply(obj, arguments);
+      if ((name === 'shift' || name === 'splice') && obj.length === 0) {
+        delete obj[0];
+      }
+    }
+    return _chainResult(this, obj);
+  };
+});
+
+// Add all accessor `Array` functions to the wrapper.
+each(['concat', 'join', 'slice'], function(name) {
+  var method = _setup.ArrayProto[name];
+  underscore.prototype[name] = function() {
+    var obj = this._wrapped;
+    if (obj != null) obj = method.apply(obj, arguments);
+    return _chainResult(this, obj);
+  };
+});
+
+module.exports = underscore;