WIP - add extractor, generate snippet_data

node_modules/unist-util-select/lib/collector.js

@@ -0,0 +1,32 @@
+'use strict';
+
+
+// @example
+//   var collect = Collector();
+//   collect('foo');
+//   collect(['foo', 'bar', 'baz']);
+//   collect.result
+//   //=> ['foo', 'bar', 'baz']
+//
+module.exports = function Collector () {
+  var result = [];
+
+  // Append elements to array, filtering out duplicates.
+  function collect (source) {
+    if (Array.isArray(source)) {
+      source.forEach(collectOne);
+    }
+    else {
+      collectOne(source);
+    }
+
+    function collectOne (element) {
+      if (result.indexOf(element) < 0) {
+        result.push(element);
+      }
+    }
+  }
+
+  collect.result = result;
+  return collect;
+};