What language does pycharm use?

To add box shadows, use box-shadow attribute; 1. The basic syntax is box-shadow: horizontal offset vertical offset blur radius expansion radius shadows in color; 2. The first three values are required, the rest are optional; 3. Use rgba() or hsla() to achieve transparent effect; 4. The positive expansion radius expands shadows and the negative value is reduced; 5. Multiple shadows can be added by commas separation; 6. Overuse should be avoided to ensure that visibility is tested on different backgrounds; this attribute is well supported by the browser, and reasonable use can improve the design texture.

Deep copy will copy the dynamic memory pointed to by the pointer, while shallow copy only copy the pointer itself, causing multiple objects to share the same piece of memory; 1. shallow copy risk: the default copy constructor performs shallow copy, so that the data of str1 and str2 point to the same memory, causing double release crash during destruction; 2. Deep copy solution: Customize copy constructor and assignment operator, allocate new memory to data and copy content to ensure the object is independent; 3. Recommended practices: follow RuleofThree, explicitly define destructors, copy constructors and assignment operators when manually managing resources; 4. Modern C recommends: use std::string or smart pointer to automatically realize deep copy to avoid manual memory management problems, and ensure safe and efficient

std::clamp is a function introduced by C 17. It is used to limit the value to a specified range and is included in the header file. Its basic usage is std::clamp(value,low,high). It returns low when value is less than low, and high when it is greater than high. Otherwise, it returns value, and low≤high is required to avoid undefined behavior; 1. This function supports built-in types and custom types, which are often used in scenarios such as user input verification, property restrictions in game development, etc.; 2. Custom comparison functions such as std::greater, but you need to ensure that comp(lo,hi) is true to conform to logic; 3. When using it, you need to ensure that the compiler supports C 17 and

The C standard library does not have a trim function, but can be implemented manually; 1. Use find_first_not_of to find the first non-whitespace character position; 2. Use find_last_not_of to find the last non-whitespace character position; 3. If all blanks are blank, return an empty string, otherwise substr will be used to extract the valid substr; 4. You can optionally modify the original string in situ and directly modify the original string; this method supports common whitespace characters such as spaces, tabs, line breaks, etc., which is simple, efficient and portable, and is suitable for most C projects.

asyncio.Queue is a queue tool for secure communication between asynchronous tasks. 1. The producer adds data through awaitqueue.put(item), and the consumer uses awaitqueue.get() to obtain data; 2. For each item you process, you need to call queue.task_done() to wait for queue.join() to complete all tasks; 3. Use None as the end signal to notify the consumer to stop; 4. When multiple consumers, multiple end signals need to be sent or all tasks have been processed before canceling the task; 5. The queue supports setting maxsize limit capacity, put and get operations automatically suspend and do not block the event loop, and the program finally passes Canc

std::accumulateinC sumselementsbyincludingtheheaderandusingthesyntaxstd::accumulate(start_iterator,end_iterator,initial_value),wheretheinitialvaluemustmatchtheresulttypetoavoidprecisionloss,anditworkssafelywithemptycontainersbyreturningtheinitialval

VariablesinPythonarecreatedbyassigningavalueusingthe=operator,anddatatypessuchasint,float,str,bool,andNoneTypedefinethekindofdatabeingstored,withPythonbeingdynamicallytypedsotypecheckingoccursatruntimeusingtype(),andwhilevariablescanbereassignedtodif

The basic usage of std::vector includes: 1. Declare vector; 2. Add elements with push_back(); 3. Initialize with initialization list; 4. Loop traversal with range for; 5. Access elements through index or back(); 6. Direct assignment of values to modify elements; 7. Delete the end elements with pop_back(); 8. Call size() to get the number of elements; it is recommended to use constauto& to avoid copying, pre-allocate reserve() to improve performance, and pay attention to checking that it is not empty before access. This data structure is an efficient and preferred way to handle string lists.