After following, you can keep track of his dynamic information in a timely manner
TheWebAnimationsAPI(WAAPI)isanativeJavaScriptinterfaceforcreatingandcontrollinganimationswithfine-grainedprogrammaticcontrol.1.Itenablesdynamicstart,pause,reverse,andseekoperationsonanimations.2.Itallowsreal-timemodificationofkeyframesandtiming.3.Its
Aug 04, 2025 am 02:42 AM
GoModule is an official dependency management mechanism introduced by Go language from 1.11. It is a collection of related Go packages, which are versioned and dependency management through go.mod files. 1. Use gomodinit to initialize the module, generate go.mod files, define module paths and Go versions; 2. Dependency management is automatically processed by Go. When running gobuild and other commands, the dependency will be automatically downloaded and updated go.mod and go.sum files; 3.go.mod records module paths, Go versions, require dependency lists, replace replacement rules and exclude exclusion versions; 4.go.sum records the checksum of the dependency module to ensure that the build is reproducible and automatically generated by the system.
Aug 04, 2025 am 02:41 AM
Passwordless login verifies identity through non-password methods. Common solutions include SMS verification code, email link, TOTP, biometrics, etc. The core is to confirm the user's identity in a safer and more convenient way, such as logging in with verification code or clicking on the email link to complete the login. Scenarios need to be considered when choosing: SMS is suitable for the public but has the risk of interception, email is suitable for the web, TOTP is highly secure and suitable for sensitive systems, FIDO2 has the strongest security but has a high technical threshold. Developers need to pay attention to clear user identification, strong verification code random short time, secure storage of tokens, support multi-factor authentication and set up fallback mechanisms. For example, the email login process is: enter the email address → generate a link with token → send an email → click the link → server verification token → create a session
Aug 04, 2025 am 02:40 AM
Circuit fuse mode is used to prevent microservices from crashing cascades due to service dependent failures; 1. Use Resilience4j to replace Hystrix that has been stopped; 2. Add resilience4j-spring-boot2 dependencies; 3. Configure the fuse rules in application.yml, such as failure rate threshold, minimum number of calls, open circuit waiting time, etc.; 4. Use @CircuitBreaker annotation on the service method and specify the fallback method to deal with the downgrade logic; 5. Combine Micrometer monitoring, reasonably match the @Retry retry mechanism, record the fuse event log, and adjust the threshold according to the importance of the service to build a highly elastic microservice system.
Aug 04, 2025 am 02:39 AM
Generating random data can be achieved through built-in libraries or specialized tools for programming languages. 1. Use built-in modules such as Python's random and secrets, and JavaScript's Math.random() to generate basic types; 2. Use field combinations to enhance the sense of reality, such as name splicing; 3. Use special libraries such as Faker and Faker.js to generate complex structures; 4. Control the data distribution and set weight rules, cover the boundary conditions, and ensure that they meet the test needs.
Aug 04, 2025 am 02:37 AM
ManualWordPressdatabasemigrationinvolvesfourkeysteps:First,exportyourcurrentdatabaseusingphpMyAdminormysqldumpviaSSH.Second,updateURLsandserializeddataintheexported.sqlfiletoreflectthenewdomainorenvironment.Third,importthemodifiedSQLfileintothenewdat
Aug 04, 2025 am 02:35 AM
Flyway and Liquibase are database automation migration tools that solve problems that are prone to errors, omissions and version confusion in manual operations. Flyway is designed with "convention over configuration" and recognizes SQL files through naming rules. It is suitable for simple scenarios. The advantages are low learning costs and easy integration. Liquibase supports XML/YAML/JSON and other formats, and provides changeSet and rollback functions, which are suitable for complex projects and multi-database environments. When choosing, it should be determined based on project complexity, team technology stack and process requirements. The key is to establish a stable migration process.
Aug 04, 2025 am 02:13 AM
XGBoost and LightGBM are integrated learning methods based on decision trees, with the difference being implementation and performance. 1.XGBoost is known for its accuracy and stability, suitable for small data sets; 2.LightGBM training is faster and memory is more cost-effective, suitable for high-dimensional features of big data; 3. In terms of missing value processing, XGBoost automatically learns the split direction, and LightGBM is allocated by default; 4. The usage process includes data preprocessing, data set division, model training, evaluation and parameter adjustment; 5. Practical suggestions include early stop mechanism, category feature processing, feature importance analysis and model saving and loading.
Aug 04, 2025 am 02:09 AM
C Attributes is a standardized annotation method used to provide additional information to the compiler to guide the compilation process. They are attached to declarations or statements through the syntax of double brackets [[attribute]], which will not change the program logic but will affect the compilation behavior. Common standard attributes include: [[nodiscard]] to prompt that the return value of a function should not be ignored; [[maybe_unused]] avoid warnings of not using variables or functions; [[deprecated]] mark out obsolete interfaces and provide alternative suggestions; [[fallthrough]] explicitly indicates intentional fallthrough in switch. Select attribu
Aug 04, 2025 am 02:05 AM
Custom Walker class can fully control the WordPress menu output structure. 1. Create a new class that inherits Walker_Nav_Menu; 2. Rewrite start_el(), start_lvl() and other methods to customize the HTML structure; 3. Specify custom class instances through the walker parameter in wp_nav_menu() to achieve high customization of menu styles and functions.
Aug 04, 2025 am 02:00 AM
Git’sstashcommandoffersadvancedfeaturesbeyondbasicsaveandpop:1.Itusesastacksystemwheremultiplestashesarestored,viewablewithgitstashlistandapplicableindividuallyusinggitstashapplyorpopwithastashreference.2.Usegitstash-utoincludeuntrackedfilesandgitsta
Aug 04, 2025 am 01:56 AM
InstallNodeExporterontheLinuxservertocollectsystemmetrics.2.Configureitasasystemdservicetoexposemetricsatport9100.3.InstallPrometheusandconfigureittoscrapemetricsfromNodeExporterbyaddingthetargetIPinprometheus.yml.4.StartPrometheustobeginscrapingmetr
Aug 04, 2025 am 01:46 AM
LaravelMix and Vite are both used for front-end resource management, but each has its own characteristics. 1.LaravelMix is based on Webpack and is suitable for small and medium-sized projects, with simple and intuitive configuration; 2. Vite starts faster and supports instant hot updates, which is more suitable for large projects; 3. Both support the processing and version control of resources such as CSS, JS and pictures, but Vite uses native ES modules in development mode, without packaging steps; 4. During deployment, Mix needs to manually enable version control, while Vite automatically generates hash file names to ensure cache updates.
Aug 04, 2025 am 01:40 AM
ToaddCAPTCHAtoformsinYii,firstenabletheCAPTCHAactioninyourcontrollerbydefiningitintheactions()method,whichcreatesadynamicrouteforgeneratingtheCAPTCHAimage.Second,createaverifyCodeattributeinyourformmodelandapplythecaptchavalidationruletoit.Third,disp
Aug 04, 2025 am 01:38 AM
InstallandlaunchJProfilerfromtheofficialwebsite,usingthestartupwizardtobeginanewsessionorattachtoaJVM.2.AttachtoyourJavaapplicationeitherbystartinganewlocalprocesswithspecifiedmainclass,VMparameters,andworkingdirectory,orbyattachingtoarunningJVMwitho
Aug 04, 2025 am 01:17 AM
The ZCOUNT command is used to count the number of members within the specified score range in the Redis ordered set. The basic usage is ZCOUNTkeyminmax. For example, ZCOUNTmyzset510 represents the number of members with a statistical score between 5 and 10; 1. By default, the range contains endpoints. If you want to exclude a certain endpoint, you can add (symbols, such as ZCOUNTleaderboard (8090 represents members with a statistical score greater than 80 and less than or equal to 90; 2. If ZCOUNT returns 0, possible reasons include that the key does not exist, all scores are not in the specified range, or the order of the minimum and maximum values is reversed; 3. When using it, you should pay attention to ensuring that min≤max, and confirm that the key exists and is an ordered set to avoid
Aug 04, 2025 am 01:15 AM
ZRANGEretrieveselementsinascendingscoreorder,whileZREVRANGEreturnsthemindescendingorder.WhenworkingwithRedissortedsets,useZRANGEtogetthelowest-to-highestscores—idealforbottom-rankedentriesornaturalorderlistings—andZREVRANGEfortop-rankeditems,suchasst
Aug 04, 2025 am 01:05 AM
Git’scorefunctionalityreliesonthreefundamentalobjecttypes—blobs,trees,andcommits—thatworktogethertostoredataassnapshots.1.Blobsstorefilecontentwithoutmetadatalikefilenamesorpermissions,andidenticalcontentsharesthesameblobduetocontent-basedSHA-1hashin
Aug 04, 2025 am 01:01 AM
ToaddresshighCPUormemoryusageinDockercontainers,startbycheckingresourceusagewithdockerstatstoidentifyproblematiccontainers.Next,setresourcelimitsusing-mformemoryand--cpusforCPUtopreventoveruse.Theninvestigateinsidethecontainerusingtoolsliketop,htop,o
Aug 04, 2025 am 12:58 AM
Verify all inputs and use precompiled statements to prevent SQL injection, use OWASP JavaEncoder to defend against XSS, and implement whitelist verification; 2. Use tools such as OWASPDependency-Check to scan dependencies regularly, update third-party libraries in a timely manner, minimize the scope of dependencies and generate SBOM; 3. Use frameworks such as SpringSecurity to implement authentication and authorization, support MFA, OAuth2.0/SSO, follow the principle of minimum permissions and record audit logs; 4. Avoid hard-coded sensitive information, use Vault or K8sSecrets to manage keys, disable debugging information in the production environment, close non-essential ports, and enable HTTPS and secure TLS configuration; 5
Aug 04, 2025 am 12:55 AM
To successfully set up a Kubernetes cluster on a bare metal Linux server, you must first prepare a machine that meets the requirements and complete the system configuration, then install containerd, kubeadm, kubelet and kubectl, then initialize the control plane node, install the CNI network plug-in, join the worker node, and perform verification. 1. Prepare at least 2-3 Linux servers with static IP, shut down swap, enable necessary kernel modules and sysctl parameters; 2. Install containerd on all nodes and configure SystemdCgroup=true; 3. Install kubeadm, kubelet and kubectl and mark as warranty
Aug 04, 2025 am 12:43 AM
ArraysofobjectsinPHPcontainclassinstances,allowingdirectpropertyormethod-basedmodifications;2.Updatepropertiesusingforeachloopssinceobjectsarepassedbyreference,orusesettersforencapsulatedproperties;3.Filterobjectswitharray_filter()tocreatesubsetsbase
Aug 04, 2025 am 12:38 AM
Array deconstruction is an important feature introduced by PHP7.1, allowing values to be extracted from arrays and assigned directly to variables, improving code readability and simplicity. 1. The basic syntax uses [$a,$b]=$array to implement position deconstruction; 2. PHP7.1 supports associative array deconstruction, such as ['name'=>$name]=$user, key name matching; 3. From PHP8.1, it can be deconstructed in foreach, such as foreach($usersas['name'=>$name,'email'=>$email]); 4. The optional fields can be processed in combination with default values, such as ['location'=>$loc='Unknow
Aug 04, 2025 am 12:34 AM
Continuen is used to skip the specified outer loop iteration in multi-layer nested loops; 1. Use continuen to skip the inner loop and directly enter the next iteration of the outer loop, such as continue2 skipping the current inner loop and continuing the outer loop; 2. In matrix processing, if a row has a specific value (such as 0), continue2 can skip the entire row to improve efficiency; 3. When analyzing nested data structures, if invalid data is found in the inner layer, continueuen can skip the corresponding parent loop; 4. Avoid overuse, especially continue3 and above, and nesting should be reduced through function splitting; 5. Although PHP does not support loop tags and requires manual counting of levels, conti is used reasonably
Aug 04, 2025 am 12:31 AM
Tobuildareal-timeRSStickerwithJavaScript,useaproxyAPIlikerss2json.comtofetchandconvertRSSfeedstoJSONduetoCORSrestrictions.2.ImplementthefetchRssFeed()functiontoretrieveandparsethelatestfeeditems.3.CreateanHTMLcontainerandapplyCSSanimationsforahorizon
Aug 04, 2025 am 12:30 AM
Areal-timeLinuxkernelisessentialforlow-latency,deterministicapplicationslikeaudioproduction,robotics,andhigh-frequencytrading,achievedbyapplyingthePREEMPT_RTpatchtoenablefullkernelpreemption.2.Preparethebuildenvironmentbyinstallingrequiredpackagessuc
Aug 04, 2025 am 12:26 AM
XMLisstillaviablechoiceforapplicationconfigurationinenterpriseanddesktopenvironmentsduetoitshierarchicalstructure,validationviaXSD,andstrongtoolingsupport.2.Itexcelsinrepresentingnestedsettings,enablingschemaenforcement,andintegratingwithmaturelibrar
Aug 04, 2025 am 12:25 AM
TheSADDcommandinRedisaddsuniquememberstoaSet,automaticallyignoringduplicates.1.ItusesthesyntaxSADDkeymember[member...],creatingthekeyifitdoesn’texist.2.RedisensuresuniquenessbynotaddingduplicatevaluesalreadypresentintheSet.3.Multiplememberscanbeadded
Aug 04, 2025 am 12:13 AM
To set up a WordPress multi-site network, please first confirm that the multi-site meets your needs, prepare the WordPress installation file, enable multi-site in wp-config.php, complete the settings through the dashboard, and manage users, themes, and plug-ins. First, evaluate whether multi-sites are suitable for you, such as for shared resources such as school departments or enterprise sub-sites; then make sure WordPress is the latest version and back up the website; then add code in wp-config.php to enable multi-site functionality; then select a subdomain name or subdirectory structure and update the configuration file according to the dashboard prompts; finally, as a "super administrator", manage themes, plug-ins and user permissions uniformly, pay attention to plug-in compatibility issues.
Aug 04, 2025 am 12:12 AM
Java's switch has evolved from early statements to modern expressions, and the answer is that it is now safer, concise and powerful. 1. Use the -> arrow to avoid break and fall-through errors; 2. Support multi-label separation with commas to simplify syntax; 3. Expressions must exhaust all situations, and the compiler ensures integrity; 4. Use yield to return values from code blocks; 5. Since Java17, pattern matching can be supported, objects can be deconstructed by type to improve expression capabilities, so modern switches are clearer, safer and in line with the trend of functional programming.
Aug 04, 2025 am 12:10 AM
