Gela Malek Pour gmalekpour@esri.com Visualize Time Enabled Data using ArcGIS Qt (C++) and ToolkitAbout Esri • We build mapping technology that our customers use to solve the world’s most complex challenges offer solutions to apply location-based analytics to business practices - Visualize and analyze data more effectively - Collaborate and share maps, apps and reports easily • Headquartered in Southern worldPurpose of this talk • Showcase a quick way to create a desktop app to visualize time enabled data • Setup the development environment using Esri templates • Use the ArcGIS toolkit to use already

Using the Microsoft Graph API to get Office 365 data in your mobile apps Alex Ziskind Technical Director @digitalix www.nuvious.com Hi, I’m Alex From + 750 Million 50 Million per month Problems

第三届中国 Rust 开发者大会 Use Rust to Develop the Decentralized Open Data Application Mike Tang daogangtang@gmail.com @daogangtang 2023-06-08 ➔ 裁员 ➔ 互联网格局定型 ➔ 平台倒闭，数据丢失 这是一个什么时代？ 互联网的终局 创业 -> 种子 dataset, data will increase quickly on any dimension. ➔ Multiple dimensions Dataset Models ➔ What is open data? Build an internet platform, but open its data to everyone. ➔ Why we need open data? The The business of the closed data model has been at the end. A New Proposal: Open Data Application The Road to Open Web ➔ From the user side, it looks like just the traditional Internet app ➔ But everyone

I: Development Process • Implementing in the Open • Organization of Work • Part II: Calendrical Types • Part III: Clocks • Part IV: Leap Seconds • What are leap seconds? • How did we implement them second awareness (https://youtu.be/c7DT28TV0AY)9 Part II: Calendrical Types10 Calendrical Types ([time.cal]) • Lots of new class types • chrono::day • chrono::month • chrono::year • chrono::month_day • chrono::year_month_day_last • chrono::year_month_weekday_last • …11 Some examples: Simple Calendrical Types #include #include using namespace std::chrono; int main() { year y{2021};

 Why ranges?  Provide nicer and easier to read syntax: vector data { 11, 22, 33 }; sort(begin(data), end(data)); ranges::sort(data);  Eliminate mismatching begin/end iterators  Allows “range adaptors” chained using pipes  |13 Ranges  Example of chaining views: vector data { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }; auto result { data | views::filter([](const auto& value) { return value % 2 == 0; })/* Can be used to implement any other synchronization concept: mutex, latches, barriers, …  Two types:  counting semaphore: models a non-negative resource count  binary semaphore: only has 1 slot

Security events and logs. SIEM Analytics of corporate networks Telemetry Industrial monitoring Sensor data IoT Self-driving cars Agriculture Smart cities, surveillance Delivery Taxi Food tech HoReCa Scientific physics Astronomy & astrophysics Econometrics ML feature analytics and research Trading & financial data Fintech Insurance Investment banking Blockchain Gambling Adult Business intelligence ClickHouse графов • Batch jobs • Data Hub Support For Semistructured Data 27 JSO data type: CREATE TABLE games (data JSON) ENGINE = MergeTree; • You can insert arbitrary nested JSONs • Types are automatically inferred

SIZE_MAX. */ size_t open_device(char const* dev); size_t open_device(std::wstring_view const dev); The types char and wchar_t do not indicate encoding. The size of wchar_t: • Windows, sizeof(wchar_t) == 2 isn’t being declared? struct data_t { int a; int b; }; /* Get data from device ‘dev’. */ data_t get_data_from(size_t dev); What defines how dev is passed or data_t is returned? Calling conventions… being used here? push ... call data_t get_data_from(unsigned int) add esp, 4 add eax, edx Caller cleanup (cdecl) push ... call data_t get_data_from(unsigned int) add eax, edx

第三届中国 Rust 开发者大会 王俊吉 RustBelt - Rust 的形式化语义模型 Outline Background • RustBelt Project • Rust Types Overview Rust Semantics • Type System • The own Predict • Exclusive Ownership & Mutable Borrow There are plenty of unsafe codes in Rust’s standard library. use after free data race array-index overflow use after free data race array-index overflow ?? ? ... RustBelt Project Background Ralf Language Coq Proof Assistant: A Formal Proof Management System built on top of built on top of Rust Types Overview Background T &mut T &T mutable borrow immutable borrow coercion move mutable reborrow

void g() const &; void h() &&;  Those can be rewritten as: void f(this Data&); void g(this const Data&); void h(this Data&&);9 Explicit Object Parameters  Classes often have const and non-const accessing multidimensional data:  Function call: data(x, y, z)  Multiple levels of array indexing: data[x][y][z]  C++23  Multidimensional subscript operator: data[x, y, z]  E.g.: T& operator[](size_t corresponding to std::size_t22 Literal Suffix for size_t  Use case: std::vector data{ 11, 22, 33 }; for (auto i = 0, count = data.size(); i < count; ++i) { /* ... */ }  Doesn’t compile: i is deduced as int

std::this_thread::sync_wait( read_socket_async(s, buff) ).value(); } AWAITABLES AS SENDERS All awaitable types are senders and can be passed to any async algorithm that accepts a sender. No extra allocation is a coroutine: task compute_helper_async(int& data); task compute_async() { int data = 0; int i = co_await compute_helper_async(data); /* ... */ } Because of the nested scopes, it’s executes it.WHY IS DETACHED COMPUTATION BAD? int compute_helper(int& data); void compute() { int data = 0; int result = compute_helper(data); /* ... */ } What would happen if compute() could return