In Example 21.2 the return value of get_even_random_number() has a new type, boost::optional<int>. boost::optional is a template that must be instantiated with the actual type of the return value. boost/optional.hpp must be included for boost::optional....
要使这与引用一起工作，您肯定需要显式的专门化，因为您不能对引用进行新的放置:您需要使用指针进行...
The signature of basic_parser<>::body_limit(n) has changed. It now accepts an optional std::uint64_t. The caller may indicate that no body limit is required by calling body_limit(boost::none). The default limits remain in place in order to maintain 'safe by default' behaviour. basic...
swap,fill_n交换与填充:int a1[10];int a2[10];std::fill_n(a1,10,5);std::fill_n(a2,10,5); boost::swap(a1,a2); std::copy() tribool正宗的三态 true false indeterminate 与optional<bool>的效果差不多 singleton_default<T>单体模版 UUID<->GUID 用于唯一标识一个物品,它保存一个16字节的数组。
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getVersion) .orElse("UNKNOWN"); 如果无法理解这段代码,可以复习Java8的lambda和方法引用,见Java8 Lambdas...这个方法可以对一个Optional使用一个函数转换为一个Optional然后把结果(两个Optional)flatten为一个单个Optional,下图给出了map和flatMap的区别: ?...lambda的语法糖,实现相同 接口默认方法实际上给接口生...
Intel® Math Kernel Library (MKL) Threadpool-Based TensorFlow (Optional) Starting with TensorFlow 2.3.0, a new feature has been added. You can choose Eigen Threadpool for TensorFlow multi-threading support instead of OpenMP, by using the compiling option --config=mkl_threadpool instead of...
(:,2:end); params = struct; params.n_threads = 1; params.search = 2; params.gap = 5; % The params argument is optional. % We use n_threads as an example % All command line supported parameters can be passed via params: params.parameter_name = value model = abcboost_train(Y,X...
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Make line numbers in the editor optional #879 convert uml to utf8 before converting to base64 #1271 Change the control icon on Windows #1411 added button for copy note link #1416 name note to imported file #1418 added encoding meta tag #1419 make save button position:fixed #1425 Remove ...