Configure launch.json file to set up the debugging environment to ensure that the program field points to the main entrance file; 2. Use launch mode to directly start the script and pass in args and env parameters; 3. Use attach mode to connect to running processes that have been started through node--inspect; 4. When debugging npm scripts, set runtimeExecutable to npm and enable integratedTerminal; 5. Improve debugging efficiency by setting breakpoints, conditional breakpoints, variable checking, expression evaluation and enabling AutoAttach; 6. If you encounter problems, check the path, startup parameters, port matching, sourceMaps configuration and restart the debugging

struct{} is a fieldless structure in Go, which occupies zero bytes and is often used in scenarios where data is not required. It is used as a signal in the channel, such as goroutine synchronization; 2. Used as a collection of value types of maps to achieve key existence checks in efficient memory; 3. Definable stateless method receivers, suitable for dependency injection or organization functions. This type is widely used to express control flow and clear intentions.

Goprovidessimpleandefficientfilehandlingusingtheosandbufiopackages.Toreadasmallfileentirely,useos.ReadFile,whichloadsthecontentintomemorysafelyandautomaticallymanagesfileoperations.Forlargefilesorincrementalprocessing,bufio.Scannerallowsline-by-liner

To build an RSS aggregator, you need to use Node.js to combine axios and rss-parser packages to grab and parse multiple RSS sources. First, initialize the project and install the dependencies, and then define a URL list containing HackerNews, TechCrunch and other sources in aggregator.js. Concurrently obtain and process data from each source through Promise.all, extract the title, link, release time and source, and arrange it in reverse order of time after merge. Then you can output the console or create a server in Express to return the results in JSON format. Finally, you can add a cache mechanism to avoid frequent requests and improve performance, thereby achieving an efficient and extensible RSS aggregation system.

MiddlewareinGowebserversarefunctionsthatinterceptHTTPrequestsbeforetheyreachthehandler,enablingreusablecross-cuttingfunctionality;theyworkbywrappinghandlerstoaddpre-andpost-processinglogicsuchaslogging,authentication,CORS,orerrorrecovery,andcanbechai

GracefulshutdownsinGoapplicationsareessentialforreliability,achievedbyinterceptingOSsignalslikeSIGINTandSIGTERMusingtheos/signalpackagetoinitiateshutdownprocedures,thenstoppingHTTPserversgracefullywithhttp.Server’sShutdown()methodtoallowactiverequest

CGOenablesGotocallCcode,allowingintegrationwithClibrarieslikeOpenSSL,accesstolow-levelsystemAPIs,andperformanceoptimization;itrequiresimporting"C"withCheadersincomments,usesC.function()syntax,anddemandscarefulmemorymanagement.However,CGOinc

Implements JSON serialization and deserialization of customizable Go structures for MarshalJSON and UnmarshalJSON, suitable for handling non-standard formats or compatible with old data. 2. Control the output structure through MarshalJSON, such as converting field formats; 3. Parsing special format data through UnmarshalJSON, such as custom dates; 4. Pay attention to avoid infinite loops caused by recursive calls, and use type alias to bypass custom methods.