add book.js

node_modules/lodash/internal/basePullAt.js

@@ -0,0 +1,30 @@
+var isIndex = require('./isIndex');
+
+/** Used for native method references. */
+var arrayProto = Array.prototype;
+
+/** Native method references. */
+var splice = arrayProto.splice;
+
+/**
+ * The base implementation of `_.pullAt` without support for individual
+ * index arguments and capturing the removed elements.
+ *
+ * @private
+ * @param {Array} array The array to modify.
+ * @param {number[]} indexes The indexes of elements to remove.
+ * @returns {Array} Returns `array`.
+ */
+function basePullAt(array, indexes) {
+  var length = array ? indexes.length : 0;
+  while (length--) {
+    var index = indexes[length];
+    if (index != previous && isIndex(index)) {
+      var previous = index;
+      splice.call(array, index, 1);
+    }
+  }
+  return array;
+}
+
+module.exports = basePullAt;