After following, you can keep track of his dynamic information in a timely manner
The key to building a trading robot is to clarify the strategy, choose the appropriate API, backtest verification and risk control processing. First, to determine the type of trading strategy such as trend tracking or grid trading, it is recommended to start with moving average strategies; second, use libraries such as ccxt or binance.py to connect to the exchange API, pay attention to permissions and frequency limitations; third, use tools such as backtrader to perform backtesting and simulate transactions to verify the stability of the strategy; finally, add risk control measures such as exception capture and circuit breaker mechanism to ensure the reliable operation of the system.
Aug 05, 2025 am 11:02 AM
Use do-while to loop to process resource-intensive tasks because it ensures that the task is executed at least once and decides whether to continue based on the runtime results. 1. This mode is suitable for scenarios where the exit condition depends on the operation result, such as knowing whether there is more work after the first attempt; 2. Polling when the service is not ready at the beginning but may resume; 3. Processing data in batches and knowing whether it needs to continue after processing; 4. When implementing, it is necessary to combine exponential backoffs, retry limits, resource cleaning and logging to optimize performance; 5. Not suitable for situations where conditions can be judged in advance, tasks are lightweight, or non-idempotent operations are performed, so when "execute first, then judge", do-while is the best choice.
Aug 05, 2025 am 10:45 AM
V8doesnotcompileJavaScriptaheadoftime;itusesajust-in-time(JIT)approach.1.ParsesourcecodeintoAST.2.GeneratebytecodeviaIgnitioninterpreter.3.Executebytecodewhilecollectingruntimetypefeedback.4.Identifyfrequentlycalled"hot"functions.5.Optimize
Aug 05, 2025 am 10:41 AM
JavaStreamAPIprovidesadeclarative,functionalapproachtoprocessdatasequenceswithoutmodifyingthesource.2.Streamsarecreatedfromcollections,arrays,orusingStream.of()andsupportinfinitestreamsviaiterate()orgenerate().3.Intermediateoperationslikefilter,map,a
Aug 05, 2025 am 10:33 AM
An excellent custom ReactHook should focus on a single function, be reusable, behaviour predictable and properly handle side effects. Common good practices include naming with use prefix, avoiding unnecessary rerendering, handling boundary situations and being tested independently. 1. The local storage logic can be encapsulated as useLocalStorage to achieve state persistence; 2. Use useForm to uniformly manage form state, changes and submissions; 3. Encapsulate loading, errors and cancel logic in data acquisition through useFetch, thereby improving code reusability and maintainability, and ultimately making components simpler and more scalable applications.
Aug 05, 2025 am 10:28 AM
Goroutine leak refers to the continuous blocking of Goroutine because it cannot exit, resulting in the resource being unable to be released. It is common in channel operation blocking, infinite loops without exit, defer not executed, context not cancellation, etc.; 1. Use runtime.NumGoroutine() to compare the number before and after, and can be initially detected; 2. Analyze the Goroutine stack positioning blocking function through pprof; common scenarios include sending data to the channel without receiver, the channel not closed, the channel not passed in the context not passed, and the defer not executed due to early return; the repair methods are to use buffered channel or select d
Aug 05, 2025 am 10:27 AM
CompletableFuture is a core asynchronous programming tool introduced by Java 8, supporting non-blocking operations, chain calls, exception handling and task combination; 2. Asynchronous tasks can be created through supplyAsync, thenApply/thenAccept/thenRun implements chain operations, where thenApplyAsync can specify thread pool execution; 3. Use thenCombine to merge two Future results, thenCompose flat nested Future, allOf waits for all tasks to complete, and anyOf to respond if any completes; 4. Exception handling is recommended to recover exceptionally, handle
Aug 05, 2025 am 10:20 AM
JavaScriptdecoratorsarefunctionsthatmodifyorenhanceclassesandclassmembersusingthe@syntax,enablingmetaprogrammingbyallowingdeveloperstodeclarativelycustomizebehavioratdefinitiontime;1.Theyworkbyinterceptingclasselementslikemethodsorfields,asshownwith@
Aug 05, 2025 am 10:14 AM
SSG generates static pages during construction, suitable for scenes where content is fixed, pursuing performance and SEO, and is implemented through getStaticProps and getStaticPaths, and supports ISR incremental updates; 2. SSR dynamically renders the server on each request, suitable for personalized and real-time data scenarios, and is implemented through getServerSideProps, and the content is real-time but the server is under great pressure; 3. Selection basis: whether the content is public and static, select SSG and SSR dynamically; 4.Next.js supports mixed use, and you can independently select SSG or SSR according to the page, taking into account performance and flexibility to achieve the optimal rendering strategy.
Aug 05, 2025 am 10:11 AM
ChooseGNOMEforaclean,macOS-likeexperiencewithminimaldistractions,idealformodernhardwareandusersprioritizingsimplicity.2.ChooseKDEPlasmaforextensivecustomizationandfeature-richintegration,perfectforpoweruserswantingfullcontrolwithoutmajorperformanceco
Aug 05, 2025 am 10:10 AM
To disable a specific package in SublimeText, use the command panel or edit the settings file. 1. Use the command panel: Open the command panel (Ctrl Shift P/Cmd Shift P), enter "disablepackage" and select "PackageControl:DisablePackage", and then select the package you want to disable from the list. 2. Edit the settings file: Go to Preferences>Settings, add or modify the "ignored_packages" array in the user settings, and put the package name to be disabled as a string. 3. Check the package status: enter "ListP" through the command panel
Aug 05, 2025 am 10:05 AM
DeeplynestedarraysinPHPcausehighmemoryoverheadduetozvalandhashtablemetadata,soflattendataoruseobjectswhenpossible;2.Copy-on-writecantriggerunintendeddeepcopiesofnestedarraysduringmodification,souseobjectsforreference-likebehaviortoavoidduplication;3.
Aug 05, 2025 am 09:42 AM
The transform attribute of CSS achieves rich visual effects through 2D and 3D transformations. 1. Common 2DTransforms include translation, scale, rotation and skew, such as translate(10px, 20px), scale(1.5), rotate(45deg), skew(10deg, 20deg), multiple functions can be used in combination, and the execution order is from right to left; 2. To implement 3DTransform, you need to enable 3D space (perspective), use translateZ(), rotateX(), and rotateY(
Aug 05, 2025 am 09:41 AM
ThemodulepatterninjavascriptsolvestheProbllobalscopepollutionandandandandandandandandandlackofencapsulation byusingClosuresandiifestocreatePrivat EvariaBlesandExPosonTrolledPublicapi; 1) IthidesInternal DataStusersandvalidatenamewithinacloslosloslosloslosloslus
Aug 05, 2025 am 09:37 AM
Use checked exceptions to indicate recovery errors, and unchecked exceptions to indicate programming errors; 2. After catching exceptions, they must be processed, recorded or re-throwed, and must not be ignored; 3. Throw exceptions as soon as possible when errors occur, and delay capture at the top of the call chain; 4. Provide clear context information when throwing exceptions to avoid vague descriptions; 5. Use try-with-resources to automatically manage resource closure to prevent resource leakage; 6. Avoid catching broad exceptions such as Exception or Throwable, and specific exception types should be captured; 7. Custom exceptions should contain semantic error information and context data; 8. Exceptions should not be used to control normal program flow to avoid performance losses; 9. Record exceptions
Aug 05, 2025 am 09:26 AM
Thewhile($line=fgets($file))patternisnotatypobutadeliberateidiomwhereassignmentreturnstheassignedvalue,whichisevaluatedfortruthinessintheloopcondition.2.Theloopcontinuesaslongasfgets()returnsatruthyvalue(i.e.,avalidline,evenifit'sanemptyor"0&quo
Aug 05, 2025 am 09:20 AM
To troubleshoot Linux file system problems such as inode corruption, file loss or metadata exception, use the debugfs tool. 1. After determining the device path, enter the debugfs interactive interface; 2. Use the stat and blocks commands to view the inode and block information; 3. For error-delete files, find their inode and judge the status and restore them; 4. Master common commands such as open, close, and quit and pay attention to operational safety. Each step of change should be recorded carefully when using it and it is recommended to practice in a test environment to avoid risks.
Aug 05, 2025 am 09:19 AM
TosetupanNFSserverandclientonLinux,firstinstallnfs-kernel-serverontheserverandnfs-commonontheclient;second,configuretheexportbyaddingtheshareddirectoryandclientpermissionsin/etc/exportsandrunsudoexportfs-afollowedbyrestartingtheNFSservice;third,onthe
Aug 05, 2025 am 09:14 AM
When you cannot connect to the cloud server, first check whether the security group settings release the corresponding port, confirm whether there are multiple security group policy conflicts, and test the temporary opening of 0.0.0.0/0; secondly check whether the SSH service is running normally, check whether the service status, listening port and configuration files are correct; then confirm whether the instance network configuration is accurate, including public network IP allocation, routing table pointing and network ACL settings; finally use serial port log or console tools to assist in troubleshooting startup problems. Check step by step in this order, most connection problems can be effectively located and resolved.
Aug 05, 2025 am 09:12 AM
Using $GLOBALS will destroy unit tests because it introduces hidden dependencies, resulting in state sharing between tests, confusing settings, poor isolation and difficult to simulate; 2. Solutions include: save first and then restore the global state to avoid contamination; 3. Encapsulate $GLOBALS access into service classes, and pass it through dependency injection to facilitate the use of mock objects in tests; 4. Even lightweight dependency injection can significantly improve testability, and directly read global variables should be avoided; 5. To prevent future problems, $GLOBALS should be disabled, and use configuration objects, dependency injection containers or environment variables instead, and use static analysis tools to detect the use of hyperglobal variables. The final answer is: the dependency on $GLOBALS must be gradually eliminated through encapsulation and dependency injection
Aug 05, 2025 am 09:06 AM
Methods of redirecting command output in Bash include: using > overwrite write files, such as ls>output.txt; using >> append write files, such as ls>>output.txt; using |tee output to the screen and file at the same time, such as ls|teeoutput.txt, if append, add the -a parameter; using 2> redirects error output separately, such as command2>error.log; using >file2>&1 to redirect both standard output and error output, in which the order must be stdout first and then stderr. Mastering these operations allows you to handle them more flexibly
Aug 05, 2025 am 09:04 AM
UnderstandhowconnectionpoolsworkbyrecognizingthatMongoDBdriversreuseconnectionstoreduceoverhead,limitconcurrentoperationsviapoolsize,andrequirepropermanagementtoavoidtimeoutsorresourceexhaustion.2.Tuneconnectionpoolsettingsbasedonworkloadbyconfigurin
Aug 05, 2025 am 08:46 AM
It is necessary to implement responsive design in web development or use media properties when loading specific styles according to different devices. Common scenarios include loading corresponding style sheets for different devices such as mobile phones, tablets, printers, etc., such as through and implementing style adaptation of different devices. Commonly used writing methods include screen, print, all, speech and other media types, as well as conditional loading based on media features such as min-width, orientation, etc. In practical applications, it is recommended to keep it simple, prioritize loading of key styles, test equipment performance, pay attention to compatibility, and distinguish the difference in the role of HTMLmedia and CSS@media, that is, the former controls whether the file is loaded, and the latter controls whether the style takes effect. Use med reasonably
Aug 05, 2025 am 08:39 AM
How to effectively review pull requests on GitHub? First of all, we must clarify the purpose of the PR, check the title, description and whether the task is related to it, and ensure that we understand the change intention. 1. Check for correctness, consistency, performance and security when reviewing the code and use inline comments to ask questions or suggestions. 2. Test the code locally if necessary, verify the function and find potential errors. 3. Decide to approve or require modification based on the review and test results, and communicate and feedback clearly. Following these steps improves code quality and facilitates collaboration.
Aug 05, 2025 am 08:37 AM
TooptimizeMySQLforreal-timestockmarketdata,focusonthefollowingsteps:1)UseInnoDBasthestorageenginefortransactions,crashrecovery,androw-levellocking,andenableinnodb_file_per_table;2)Designefficientindexes,especiallyacompoundindexon(symbol,timestamp),an
Aug 05, 2025 am 08:24 AM
CreateadeclarativeAtlasSearchindexusingJSONtospecifyfieldslikename,description,andcategorywithdynamic:falseforcontrol.2.Usethe$searchaggregationstageinsteadof$match,enablingtextsearchacrossspecifiedfieldswithrelevancescoring.3.Boostrelevancebyassigni
Aug 05, 2025 am 08:21 AM
Use$array[]=$valueforefficientsingle-elementadditioninsteadofarray_push().2.Usearray_unshift()toprependelements,butbeawareofO(n)performanceduetoreindexing.3.Usearray_splice()toinsertelementsatanypositionwithprecision.4.Usearray_merge()tocombinearrays
Aug 05, 2025 am 08:18 AM
The key to implementing WebAR is to use WebXR and A-Frame to build basic frameworks, image recognition and tracking, performance optimization, browser permissions and compatibility processing. 1. Use WebXR and A-Frame to quickly build highly compatible and easy-to-scaling AR scenes; 2. Image recognition depends on JSARToolKit or 8thWall, and high-quality markers need to be selected to improve stability; 3. Performance optimization includes simplifying the model, limiting frame rates, lazy loading resources and dynamically adjusting image quality; 4. It is necessary to process browser permission requests, adapt to different browsers, and ensure HTTPS environment support.
Aug 05, 2025 am 08:14 AM
No,quantumcomputerswillnotreplaceclassicalcomputersanytimesoon.1.Quantumcomputingusesqubitswithsuperpositionandentanglement,enablingexponentialspeedupsforspecificproblemslikecryptography,drugdiscovery,optimization,andnichemachinelearningtasks.2.Class
Aug 05, 2025 am 08:10 AM
Using iterators (such as classes that implement the Iterator interface) can efficiently process large data sets to avoid memory waste; 2. array_walk is suitable for scenarios where the original array is directly modified, and supports operational elements and access keys by reference; 3. Unlike array_map, array_walk does not generate new arrays, which is suitable for on-site conversion; 4. It can combine it with iterators and callback functions to build reusable and composable data processing logic; 5. Foreach is still suitable for simple loops, but iterators or array_walk should be used in complex scenarios to improve efficiency and code quality. Mastering these technologies can achieve more efficient and flexible PHP data traversal and conversion.
Aug 05, 2025 am 08:07 AM
