public: Person(std::string name) : m_name{std::move(name)} {} std::string& GetName() & { return m_name; } const std::string& GetName() const & { return m_name; } std::string&& GetName() GetName() && { return std::move(m_name); } private: std::string m_name; };10 Explicit Object Parameters  Code duplication  Can be avoided by delegating to helper methods  Cumbersome  C++23:  Explicit template auto&& GetName(this Self&& self) { return std::forward(self).m_name; }11 Explicit Object Parameters  Allows for recursive lambda expressions  this in a lambda accesses

|device_memory_resource mem; std::pmr::monotonic_buffer_resource chunk(&mem); vector x(N, &chunk); vector y(N, &chunk); // … Intermediate Memory Resources 31 |std::pmr::vector

"clickhouse.altinity.com/v1" kind: "ClickHouseInstallation" metadata: name: "demo-01" spec: configuration: clusters: - name: "demo" Здесь нет storage Еще вернемся к этому kubectl – наше всё com/demo-01 created 3. RESULT $ kubectl get all -n demo NAME READY STATUS pod/chi-demo-01-demo-0-0-0 1/1 Running NAME TYPE CLUSTER-IP service/chi-demo-01-demo-0-0 ClusterIP None service/clickhouse-demo-01 LoadBalancer 10.98.143.187 NAME DESIRED CURRENT AGE statefulset.apps/chi-demo-01-demo-0-0

PERMISSIVE if no set apiVersion: "security.istio.io/v1beta1“ kind: "PeerAuthentication“ metadata: name: "demo-peer-policy“ namespace: "default“ spec: selector: matchLabels: app: reviews service outside mesh apiVersion: networking.istio.io/v1alpha3 kind: DestinationRule metadata: name: reviews spec: host: reviews trafficPolicy: tls: mode: ISTIO_MUTUAL 1) Generate client kind: Gateway metadata: name: bookinfo-gateway spec: selector: istio: ingressgateway # use istio default controller servers: - port: number: 443 name: https protocol: HTTPs

id ], Pairs: { // field mapping id: id, name: name } } PTS Provider Transform Sinker ● Major Provider ● Secondary Providers PTS Provider Magical Flag Create id name flag 2 Bob1 0 id name flag 2 Bob1 1 PTS Magical Flag Read PTS Magical Flag Update PTS Magical Flag Update id name flag 2 Bob1 1 2 Bob2 0 id name flag 2 Bob1 2 2 2 Bob2 1 PTS Magical Flag Delete PTS Magical Flag Delete id name flag 2 Bob1 2 2 Bob2 1 2 Bob2 3 id name flag 2 Bob1 2 2 Bob2 2 2 Bob2 3 PTS Magical Flag Add new column PTS Magical Flag

：根项目输出路径（存放 main.exe 的地方） • PROJECT_IS_TOP_LEVEL ： BOOL 类型，表示当前项目是否是（最顶层的）根项目 • PROJECT_NAME ：当前项目名 • CMAKE_PROJECT_NAME ：根项目的项目名 • 详见： https://cmake.org/cmake/help/latest/command/project.html 子模块里也可以用 project 项目名的另一大作用：会设置另外 < 项目名 >_SOURCE_DIR 等变量 小技巧： CMake 的 ${} 表达式可以嵌套 因为 ${PROJECT_NAME} 求值的结果是 hellocmake 所以 ${${PROJECT_NAME}_VERSION} 相当于 ${hellocmake_VERSION} 进一步求值的结果也就是刚刚指定的 0.2.3 了。 cmake_minimum_required html#genex:PLATFORM_ID 语法： $<$< 类型 : 值 >: 为真时的表达式 > 比如 $<$:MY_NAME=”Bill Gates”> 在 Windows 平台上会变为 MY_NAME=”Bill Gates” 其他平台上则表现为空字符串 生成器表达式：如需多个平台可以用逗号分割 https://cmake.org/cmake/help

all time zone transitions for a specific geographic area (e.g., America/New York). • Stores its name as well as details like the UTC offset for that time zone, whether it is during “daylight saving” vector leap_seconds; • And has member functions: • const time_zone* locate_zone(string_view tz_name) co nst; • const time_zone* current_zone() const;44 Getting a tzdb • There also exists a type begin(), db.zones.end(), [](const time_zone& z) { std::cout << "Zone: " << z.name() << "\n"; }); } Output Time Zone descriptions: Zone: Africa/Abidjan Zone: Africa/Accra

submodules and module partitions  No need for include guards  No need to invent unique names, same name in multiple modules will not clash  Modules are processed only once  faster build times  Preprocessor std::string aString; }; Data d { .aString = "Hello" };48 Spaceship Operator <=>  Official name: three-way comparison operator  Three-way: comparing 2 objects and then comparing result with  Represents information about a specific location in a source code  line, column, file_name, function_name  Construct one using source_location::current()  Example: void LogInfo(string_view info

SELECT JSONExtractString(data, 'teams', 1, 'name') FROM games; — 0.520 sec. CREATE TABLE games (data JSON) ENGINE = MergeTree; SELECT data.teams.name[1] FROM games; — 0.015 sec. Support For Semistructured describe_extend_object_types = 1 name: data type: Tuple( `_id.$oid` String, `date.$date` String, `teams.abbreviation` Array(String), `teams.city` Array(String), `teams.home` Array(UInt8), `teams.name` Array(String), `teams