node_modules

1 files changed, 53 insertions, 0 deletions

diff --git a/node_modules/fbjs/lib/countDistinct.js b/node_modules/fbjs/lib/countDistinct.js
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+++ b/node_modules/fbjs/lib/countDistinct.js
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+/**
+ * Copyright (c) 2013-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * 
+ */
+
+'use strict';
+
+var Set = require('./Set');
+
+var emptyFunction = require('./emptyFunction');
+
+/**
+ * Returns the count of distinct elements selected from an array.
+ */
+function countDistinct(iter, selector) {
+  selector = selector || emptyFunction.thatReturnsArgument;
+
+  var set = new Set();
+  var _iteratorNormalCompletion = true;
+  var _didIteratorError = false;
+  var _iteratorError = undefined;
+
+  try {
+    for (var _iterator = iter[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
+      var val = _step.value;
+
+      set.add(selector(val));
+    }
+  } catch (err) {
+    _didIteratorError = true;
+    _iteratorError = err;
+  } finally {
+    try {
+      if (!_iteratorNormalCompletion && _iterator['return']) {
+        _iterator['return']();
+      }
+    } finally {
+      if (_didIteratorError) {
+        throw _iteratorError;
+      }
+    }
+  }
+
+  return set.size;
+}
+
+module.exports = countDistinct;
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