add book.js

node_modules/lodash/internal/createSortedIndex.js

@@ -0,0 +1,20 @@
+var baseCallback = require('./baseCallback'),
+    binaryIndex = require('./binaryIndex'),
+    binaryIndexBy = require('./binaryIndexBy');
+
+/**
+ * Creates a `_.sortedIndex` or `_.sortedLastIndex` function.
+ *
+ * @private
+ * @param {boolean} [retHighest] Specify returning the highest qualified index.
+ * @returns {Function} Returns the new index function.
+ */
+function createSortedIndex(retHighest) {
+  return function(array, value, iteratee, thisArg) {
+    return iteratee == null
+      ? binaryIndex(array, value, retHighest)
+      : binaryIndexBy(array, value, baseCallback(iteratee, thisArg, 1), retHighest);
+  };
+}
+
+module.exports = createSortedIndex;