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typescript 对象

TypeScript中的对象是一个包含了一组属性和对应值的数据结构。它可以用来表示一个实体、一组数据等等。在TypeScript中，对象的类型可以使用接口或类型别名来定义。例如：interfacePerson{name:string;age:number;gender:'male'|'femal...

开发笔记 ·2024-09-01

typescript function

TypeScript函数是一段可重复使用的代码块，用于执行特定的任务。它可以接收参数并返回值。TypeScript函数可以使用不同的语法来定义，包括函数声明，函数表达式和箭头函数。函数声明：functionfunctionName(parameter1:type,parameter2:type):returnType{...

开发笔记 ·2024-09-01

typescript中文官网

TypeScript是一种静态类型的JavaScript超集，它可以编译成纯JavaScript，并且可以运行在任何浏览器、Node.js和任何支持ECMAScript标准的环境中。TypeScript提供了更好的可读性、可维护性和可扩展性，它支持ES6和ES7的最新特性，并且可以在编译时进行类型检查，避免了在运行时出...

开发笔记 ·2024-09-01

ORA-24240: invalid database access descriptor (DAD) name

文档解释ORA-24240:invaliddatabaseaccessdescriptor(DAD)nameCause:ThespecifiedDatabaseAccessDescriptor(DAD)namewasinvalid.Action:MakesurethenameoftheDatabaseAccessDes...

IT技术学习 ·2023-07-28

ORA-48407: DESCRIBE and QUERY commands need at least relation name argument

文档解释ORA-48407:DESCRIBEandQUERYcommandsneedatleastrelationnameargumentCause:ThisisnorelationnameisinputasargumentAction:Needuserstoinputatleasttherelationname这是一...

IT技术学习 ·2023-07-28

ORA-14640: add/coalesce index partition operation is valid only for hash partitioned global indexes

文档解释ORA-14640:add/coalesceindexpartitionoperationisvalidonlyforhashpartitionedglobalindexesCause:Userattemptedtoaddorcoalesceanindexpartitionofaglobalindexnotpa...

IT技术学习 ·2023-07-28

ORA-13352: the coordinates do not describe a circle

文档解释ORA-13352:thecoordinatesdonotdescribeacircleCause:Thesetofcoordinatesusedtodescribeacircleareincorrect.Action:Confirmthatthesetofcoordinatesactuallyrepresen...

IT技术学习 ·2023-07-26

ORA-14015: too many partition descriptions

文档解释ORA-14015:toomanypartitiondescriptionsCause:CREATETABLEorCREATEINDEXcontainedtoomanypartitiondescriptions;maximumnumberofpartitionsis1048575(1024K-1).Action...

IT技术学习 ·2023-07-26

ORA-28664: a partitioned table may not be coalesced as a whole

文档解释ORA-28664:apartitionedtablemaynotbecoalescedasawholeCause:UserattemptedtocoalesceapartitionedIOTusingALTERTABLECOALESCEstatement,whichisillegalAction:Coales...

IT技术学习 ·2023-07-26

ORA-24336: invalid result set descriptor

文档解释ORA-24336:invalidresultsetdescriptorCause:TheresultsetdescriptorshouldhavevaliddatafetchedintoitbeforeitcanbeconvertedtoastatementhandleAction:Fetchvaliddat...

IT技术学习 ·2023-07-26

ORA-08111: a partitioned index may not be coalesced as a whole

文档解释ORA-08111:apartitionedindexmaynotbecoalescedasawholeCause:UserattemptedtocoalesceapartitionedindexusingALTERINDEXCOALESCEstatement,whichisillegalAction:Coal...

IT技术学习 ·2023-07-26

ORA-25502: concurrent ALTER SYSTEM QUIESCE/UNQUIESCE command is running

文档解释ORA-25502:concurrentALTERSYSTEMQUIESCE/UNQUIESCEcommandisrunningCause:ThereisaconcurrentALTERSYSTEMQUIESCERESTRICTEDorALTERSYSTEMUNQUIESCEcommandrunninginth...

IT技术学习 ·2023-07-26

ORA-48459: “describe” command only supports one ADR home path

文档解释ORA-48459:“describe”commandonlysupportsoneADRhomepathCause:MultipleADRhomepathsinthecommandAction:putoneADRhomepathORA-48459:“describeR...

IT技术学习 ·2023-07-26

ORA-14285: cannot COALESCE the only partition of this hash partitioned table or index

文档解释ORA-14285:cannotCOALESCEtheonlypartitionofthishashpartitionedtableorindexCause:ACOALESCEPARTITIONcommandwasissuedwhenthereisonlyonepartitioninthetableorinde...

IT技术学习 ·2023-07-25

ORA-12514: TNS:listener does not currently know of service requested in connect descriptor

文档解释ORA-12514:TNS:listenerdoesnotcurrentlyknowofservicerequestedinconnectdescriptorCause:Thelistenerreceivedarequesttoestablishaconnectiontoadatabaseorotherserv...

IT技术学习 ·2023-07-23