Added the underscore node_module.

node_modules/underscore/cjs/sample.js

@@ -0,0 +1,29 @@
+var _isArrayLike = require('./_isArrayLike.js');
+var values = require('./values.js');
+var _getLength = require('./_getLength.js');
+var random = require('./random.js');
+var toArray = require('./toArray.js');
+
+// Sample **n** random values from a collection using the modern version of the
+// [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher–Yates_shuffle).
+// If **n** is not specified, returns a single random element.
+// The internal `guard` argument allows it to work with `_.map`.
+function sample(obj, n, guard) {
+  if (n == null || guard) {
+    if (!_isArrayLike(obj)) obj = values(obj);
+    return obj[random(obj.length - 1)];
+  }
+  var sample = toArray(obj);
+  var length = _getLength(sample);
+  n = Math.max(Math.min(n, length), 0);
+  var last = length - 1;
+  for (var index = 0; index < n; index++) {
+    var rand = random(index, last);
+    var temp = sample[index];
+    sample[index] = sample[rand];
+    sample[rand] = temp;
+  }
+  return sample.slice(0, n);
+}
+
+module.exports = sample;