add book.js

node_modules/lodash/internal/createFindIndex.js

@@ -0,0 +1,21 @@
+var baseCallback = require('./baseCallback'),
+    baseFindIndex = require('./baseFindIndex');
+
+/**
+ * Creates a `_.findIndex` or `_.findLastIndex` function.
+ *
+ * @private
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new find function.
+ */
+function createFindIndex(fromRight) {
+  return function(array, predicate, thisArg) {
+    if (!(array && array.length)) {
+      return -1;
+    }
+    predicate = baseCallback(predicate, thisArg, 3);
+    return baseFindIndex(array, predicate, fromRight);
+  };
+}
+
+module.exports = createFindIndex;