After following, you can keep track of his dynamic information in a timely manner
Usegitreverttosafelyundoapushedcommitbycreatinganewcommitthatreverseschangeswithoutalteringhistory,idealforsharedbranches.2.Usegitresetonlyifnooneelsehaspulledthecommit,followedbygitpush--force-with-leasetoupdatetheremote,butavoidthisonsharedbranches
Aug 05, 2025 am 04:59 AM
In Redis, use the TTL command to view the remaining survival time of the key. 1.TTLkey_name returns the remaining expiration time of the key. If the return integer greater than or equal to 0 indicates the remaining number of seconds; -1 indicates that the expiration time has not been set; -2 indicates that the key does not exist. 2. Modifying the key value will not reset the expiration time, and will only be updated if the expiration parameters such as EXPIRE are reset. 3. If millisecond precision is required, you can use the PTTL command. 4. TTL is often used for cache monitoring, current limiting mechanisms and debugging cache behaviors, such as for viewing the remaining time limit when the login fails to be limited. Mastering TTL and PTTL can effectively manage the Redis key life cycle.
Aug 05, 2025 am 04:58 AM
JPMS,introducedinJava9,bringsmodularitytoJavabyenablingstrongencapsulationandexplicitdependenciesthroughmodule-info.javafiles;1.ItsolvesJARhellbyrequiringcleardeclarationsofdependenciesandfailingfastonmissingmodules;2.Itenforcesencapsulationbyrestric
Aug 05, 2025 am 04:56 AM
Usecontinuetoskipthecurrentloopiterationandcontinuewiththenextonewithoutexitingthefunction.2.Usereturntoimmediatelyexittheentirefunctionandoptionallyreturnavalue.3.Continueisidealforfilteringorskippingunwanteddatawithinloops.4.Returnisappropriatewhen
Aug 05, 2025 am 04:52 AM
Using Multer is the core method for handling Node.js file uploads. 1. First, install Multer through npm and configure Express middleware; 2. Use diskStorage to define storage paths and file names to avoid the risk of path traversal; 3. Set file size limits and file type filtering to ensure that only images, PDFs, Word and other secure formats are allowed; 4. Support .single() when uploading single files, and use .array() when uploading multiple files and specify the quantity; 5. Front-end forms need to set enctype="multipart/form-data" and corresponding name attributes; 6. Pass express.st
Aug 05, 2025 am 04:45 AM
To configure the network binding of the Linux server, first select the appropriate binding mode, such as mode=1 (active-backup) for redundancy; then load the bonding module and ensure it is loaded on; then create a bond0 interface through configuration files or Netplan and set a slave network card; finally verify the binding status and test failover. 1. Select mode: mode=1 is suitable for high-availability scenarios without the support of switches; 2. Loading module: Use modprobebonding and add it to /etc/modules-load.d/; 3. Configure interface: Edit ifcfg-bond0 and ifcfg-ensxx text in RHEL/CentOS
Aug 05, 2025 am 04:43 AM
Thedeprecationofregister_globalsandtheadoptionoffilterfunctionsmarkedapivotalshiftinPHP’ssecurityevolution;1.register_globalswasremovedduetoitsvulnerabilitytovariableinjection,allowingattackerstomanipulatescriptvariablesviaURLsorcookies;2.theriseofsu
Aug 05, 2025 am 04:40 AM
UseGraalVMnativeimagestoreducestartuptomillisecondsbyeliminatingJVMinitialization,thoughitrequireshandlingreflectionandlongerbuildtimes;2.MinimizedependenciesandadoptlightweightframeworkslikeMicronautorQuarkustodecreaseJARsizeandimproveloadspeed;3.Op
Aug 05, 2025 am 04:30 AM
JavaRecordsareidealforDTOsbecausetheyprovideimmutability,reduceboilerplate,andalignwithdata-carriersemantics.1.Recordsenforceimmutabilitybydefault,withfinalfieldsandnosetters,ensuringthreadsafetyandpreventingaccidentalstatechanges.2.Theyeliminateboil
Aug 05, 2025 am 04:21 AM
Prevent access to hidden files such as .htaccess or .git is intended to protect the sensitive configuration information of the website and avoid being attacked or data breaches. There are three main solutions: 1. Apache users can add rules to the .htaccess file to prevent access to all or specific hidden files; 2. Nginx users can use location rules in configuration to block access to hidden files; 3. Correctly set file permissions and move sensitive files out of the web root directory to enhance security.
Aug 05, 2025 am 04:16 AM
Flexboxisessentialforresponsivedesignasitsimplifieslayoutcreationthroughspacedistributionandalignment.1.Usedisplay:flexonthecontainertoenableFlexbox,setflex-directionforlayoutflow,flex-wrap:wrapforresponsiveness,andjustify-contentandalign-itemsforali
Aug 05, 2025 am 04:15 AM
There are three ways to protect the WordPress backend: 1. Use .htpasswd and .htaccess to add server-layer passwords. By creating encrypted credential files and configuring access control, you cannot enter even if you know the login address and account number; 2. Change the default login address and use plug-ins such as WPSHideLogin to customize the login URL to reduce the risk of being automated attacks; 3. In combination with the IP whitelist restricting access sources, set to allow only specific IPs to access wp-login.php in the server configuration to prevent login attempts at unauthorized locations.
Aug 05, 2025 am 04:04 AM
Ss is a faster and more efficient network connection analysis tool than netstat. Because it directly reads kernel memory, supports fine filtering and has more detailed output, it is recommended to replace netstat; use ss-tuln to view all listened TCP/UDP ports, ss-tstateestablished is used to list established TCP connections, ss-tulnp displays the process information of the occupied ports, and advanced filtering can be achieved through expressions such as dst, src, and dport. Combined with watch commands, real-time monitoring is achieved. It is a necessary tool for Linux system administrators and developers to conduct network troubleshooting.
Aug 05, 2025 am 04:01 AM
When dealing with large tables, MySQL performance and maintainability face challenges, and it is necessary to start from structural design, index optimization, table sub-table strategy, etc. 1. Reasonably design primary keys and indexes: It is recommended to use self-increment integers as primary keys to reduce page splits; use overlay indexes to improve query efficiency; regularly analyze slow query logs and delete invalid indexes. 2. Rational use of partition tables: partition according to time range and other strategies to improve query and maintenance efficiency, but attention should be paid to partitioning and cutting issues. 3. Consider reading and writing separation and library separation: Read and writing separation alleviates the pressure on the main library. The library separation and table separation are suitable for scenarios with a large amount of data. It is recommended to use middleware and evaluate transaction and cross-store query problems. Early planning and continuous optimization are the key.
Aug 05, 2025 am 03:55 AM
UseJWTforauthenticationbygeneratingasignedtokenuponlogincontaininguserclaimsandasecretkey.2.ProtectrouteswithmiddlewarethatvalidatestheJWTintheAuthorizationheaderandextractsusercontext.3.Implementauthorizationviarole-basedmiddleware(e.g.,AdminOnly)or
Aug 05, 2025 am 03:44 AM
Redis7.0'sSINTERCARDcommandefficientlycomputestheintersectioncardinalityofmultiplesetswithoutreturningtheelements.Itavoidsmemoryinefficiencybynotgeneratingthefulllist,supportsoptionalLIMITtocapcomputation,andisidealforrecommendationsystemsorsocialnet
Aug 05, 2025 am 03:41 AM
Using BenchmarkDotNet is a necessary choice for accurately measuring the performance of C# code. It provides reliable results through automatic warm-up, multiple iterations and statistical analysis; 1. Install NuGet package and mark the test method with [Benchmark]; 2. Use [MemoryDiagnoser] to obtain memory allocation and GC information; 3. Compare different .NET runtime performance through [ClrJob] and [CoreJob]; 4. Use [Params] to implement parameterized tests to evaluate performance in different scenarios; at the same time, it is necessary to avoid including initialization logic in benchmark tests, disable JIT optimization or running in unstable environments. You should always pay attention to the average execution time, standard deviation and baseline ratio, combined with customization
Aug 05, 2025 am 03:35 AM
Intentionallycreatinginfinitewhileloopsisacceptableandnecessaryfordaemonsandlistenersthatmustruncontinuously.2.Suchloopsareusedinnetworkservers,filewatchers,messagequeueconsumers,andsystemmonitorstokeeptheprocessaliveandresponsive.3.Touseinfiniteloop
Aug 05, 2025 am 03:30 AM
Start using SpringInitializr to create a SpringBoot project containing SpringWeb, Actuator and Lombok to build basic microservices; 2. Use NetflixEureka to implement service discovery, enable the Eureka server through the @EnableEurekaServer annotation and register the microservices to Eureka; 3. Use SpringCloudGateway as the API gateway to define routing rules in the configuration to forward the request to the corresponding microservices; 4. Use SpringCloudConfig to centrally manage the external configuration of each microservice from the Git repository to improve configuration maintenance efficiency; 5.
Aug 05, 2025 am 03:29 AM
The ways in which array_merge() and operators handle combinations and merges in PHP are different: 1. array_merge() will re-index the numeric keys and overwrite the duplicate keys with subsequent values, which is suitable for appending or replacing scenarios; 2. The operator retains the key values of the left array, and does not overwrite the existing keys, which is suitable for setting default values; 3. For indexing arrays, the operator may cause the right array value to be ignored due to key conflicts; 4. The selection should be based on data structure and requirements. Array_merge() is suitable for list merging, suitable for configuration or default value merging, and attention should be paid to the key type and performance impact.
Aug 05, 2025 am 03:28 AM
Exporting data table content with specific filter criteria in Navicat can be achieved in two ways. 1. Use the filter function: Open the data table, click the "Filter" button and set the conditions (such as status=1 or time range). After applying, only the data matching the conditions will be displayed. Then right-click and select "Export Wizard" to save it in CSV, Excel and other formats. 2. Use the query function: Create a new query and write a SELECT statement (such as SELECT*FROMordersWHEREcustomer_id=100), click the "Export Results" button after running the results, select the format and export the file. Notes include: confirming the accurate filtering or query results, reasonably selecting the export format, and enabling background guidance when large data volumes
Aug 05, 2025 am 03:02 AM
JMeter is more suitable for beginners and small-scale testing, while Gatling is more suitable for developers and large-scale stress testing. 1. Difficulty to get started: JMeter's graphical interface is more friendly and suitable for beginners to quickly build and test; Gatling requires basic programming, but scripts are easier to maintain and integrate. 2. Script maintenance: JMeter's script is bloated and difficult to modify in complex scenarios, while Gatling uses clear code structure and supports reuse and data-driven testing. 3. Pressure generation: JMeter uses high resource consumption and limited concurrency capabilities based on thread model; Gatling's asynchronous non-blocking mechanism supports higher concurrency. 4. Report analysis: JMeter provides basic reporting functions, and Gatling automatically generates beautiful and detailed HTs
Aug 05, 2025 am 02:56 AM
CQRSseparatesreadandwriteoperationstoimprovemaintainabilityandscalability.2.MediatRenablesthispatternviain-memorymessagingforcommandsandqueries.3.SetupanASP.NETCoreprojectandinstallMediatR,EntityFramework,andrelatedpackages.4.DefineadatamodelsuchasPr
Aug 05, 2025 am 02:52 AM
To start and stop a service in DockerCompose, you need to use the corresponding command to control the entire application stack. 1. Use docker-composeup to start the service, which is run in the foreground by default. Adding the -d flag can be run in the background; 2. Stop and remove containers and networks to use docker-composedown, add -v to delete named volumes at the same time; 3. Use docker-composeps to view the service status, use docker-composelogs to view the logs, and add -f to track log output in real time. These basic commands provide complete control over containerized applications.
Aug 05, 2025 am 02:51 AM
The key to accessing and modifying multidimensional array elements is to master index rules, avoid shallow copy traps, and utilize efficient tools. 1. Use indexes starting from 0 and access them in main order of rows (such as matrix1 to obtain the second row and second column elements of the two-dimensional array); 2. Assign values directly when modifying elements, but pay attention to creating independent sublists through list comprehension to avoid shared references; 3. Always check the index boundaries to prevent out-of-bounds errors; 4. Prioritize tuple indexing, slices, boolean indexing and fancy indexing using libraries such as NumPy to improve efficiency; 5. Pay attention to the impact of memory layout on performance, give priority to traversal, and use vectorized operations to replace nested loops to improve execution speed.
Aug 05, 2025 am 02:39 AM
To effectively debug remote Java applications, first add the -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=*:5005 parameters when the remote JVM is started to enable debugging; then configure the remote debugging connection in the IDE, such as IntelliJIDEA or Eclipse to set the host and port as remote address and 5005 port and connect; then deal with common problems: 1. Check whether the remote JVM is listening, firewall settings and startup parameters are correct when the connection is denied; 2. Ensure that the source code version is consistent and contains debugging information when the breakpoint is not triggered; 3. If the debugging is slow, you can combine logs or bars when the network delay causes slow debugging.
Aug 05, 2025 am 02:35 AM
MongoDB high availability is achieved through replica sets, including primary nodes, secondary nodes and optional arbitrators; 2. Automatic failover is completed within 10-30 seconds to ensure that the service does not interrupt when the primary node is down; 3. Data redundancy avoids single point of failure, and multiple replicas ensure data security; 4. Secondary nodes can share the read load, improve performance, but pay attention to replication delays; 5. Maintenance does not require downtime, and supports rolling upgrades and backups; 6. Best practices include deploying odd members, distribution across fault domains, monitoring replication delays, adjusting timeouts for optimal readouts, using most write attention, and enabling logging; 7. Beware of brain split-brain problems caused by failover rollback, hidden members cannot be upgraded to primary and network partitions, and only by correct configuration can we truly achieve high availability.
Aug 05, 2025 am 02:33 AM
PiniaistheofficiallyrecommendedstatemanagementsolutionforVue3asof2024,offeringamodern,streamlinedarchitecturewithnomutations,modularstoresbydefault,andanintuitiveAPIusingdefineStore().2.ItprovidessuperiorTypeScriptsupportwithfulltypeinferenceandautoc
Aug 05, 2025 am 02:30 AM
GeneratorsarethebetterchoiceforhandlinglargedatasetsinPHPduetotheirsuperiormemoryefficiency.1.Arraysstorealldatainmemoryatonce,leadingtohighmemoryusage—e.g.,100,000rowsat1KBeachconsume~100MB,makingthemunsuitableforlarge-scaleprocessingundermemorycons
Aug 05, 2025 am 02:29 AM
TohandleerrorsinNavicatbatchjobs,startbycheckingthejoblogtoidentifythefailurepoint.1.OpentheBatchJobwindow,viewtheLogtab,andlookforredentriesindicatingerrors.2.Enablethe“ContinueonError”optionselectivelyfornon-criticaltaskstoallowremainingstepstoproc
Aug 05, 2025 am 01:55 AM
