add book.js

node_modules/lodash/chain/thru.js

@@ -0,0 +1,26 @@
+/**
+ * This method is like `_.tap` except that it returns the result of `interceptor`.
+ *
+ * @static
+ * @memberOf _
+ * @category Chain
+ * @param {*} value The value to provide to `interceptor`.
+ * @param {Function} interceptor The function to invoke.
+ * @param {*} [thisArg] The `this` binding of `interceptor`.
+ * @returns {*} Returns the result of `interceptor`.
+ * @example
+ *
+ * _('  abc  ')
+ *  .chain()
+ *  .trim()
+ *  .thru(function(value) {
+ *    return [value];
+ *  })
+ *  .value();
+ * // => ['abc']
+ */
+function thru(value, interceptor, thisArg) {
+  return interceptor.call(thisArg, value);
+}
+
+module.exports = thru;