什么是Hash算法Hash，一般翻译做“散列”，也有直接音译为“哈希”的，就是把任意长度的输入（又叫做预映射，pre-image），通过散列算法。哈希算法将任意长度的二进制值映射为较短的固定长度的二进制值，这个小的二进制值称为哈希值。哈希值是一段数据唯一且极其紧凑的数值表...

(1)HashMap的概述HashMap是基于哈希表的Map接口的非同步（非线程安全）实现，允许使用null值和null键，此类不保证映射的顺序。(2)HashMap的数据结构HashMap实际上是一个“链表散列”的数据结构，即数组和链表的结合体。HashMap的底层就是一个数组结构，数组中的每...

镜像使用方法（三种办法任意一种都能解决问题，建议使用第三种，将配置写死，下次用的时候配置还在）:1.通过config命令1npmconfigsetregistry http://registry.cnpmjs.org2npminfounderscore（如果上面配置正确这个命令会有字符串response）2....

解决方法：回收进程池...

文档解释ORA-39183:internalerrorstringocurredduringdecompressionphasestringCause:Anunexpectederroroccurredwhiledecompressingdatabuffers.Action:ContactOracleCustomerS...

文档解释ORA-38810:Implementationrestriction:cannotdropeditionthathasaparentandachildCause:Thiserroroccurredbecauseanattemptwasmadetodropaneditionthathasaparentandac...

文档解释ORA-27457:argumentstringofjob“string.string”hasnovalueCause:Novaluewasprovidedforthejobargumentwiththespecifiedposition.Action:Provideavaluefort...

文档解释ORA-38808:editionhasausableparentandausablechildCause:Anattemptwasmadetomakeaneditionwithausableparentandausablechildeditionunusable.Action:Aneditionwithaus...

文档解释ORA-29374:resourceplanstringintop-planstringhasnoplandirectivesCause:Aplanwascreatedinthependingareathatisanorphanorstand-alone.Action:Createplandirectivesi...

文档解释ORA-30364:thislevelhasthesamesetofcolumnsasanotherCause:Theleveldefinitioncontainedthesamesetofcolumnsasanotherlevel.Action:Eliminatetheredundantleveldefini...

文档解释ORA-31114:XDBconfigurationhasbeendeletedoriscorruptedCause:TheXDBconfigurationresourcehasbeendeletedorcorrupted.Action:ReinstallXDB,orreinsertavalidconfigur...

文档解释ORA-53432:TheDICOMobjectattributestringhasinvaliddefinername.Cause:AprivateattributedefinerforaprivateattributecontainedinthisDICOMobjecthadinvalidcharacter...

文档解释ORA-38820:userhasevolvedobjecttypeCause:Usercouldnotbeeditionenabledifithasevolvedobjecttype.Action:Resettheevolvedobjecttypefirst.错误说明ORACLE错误代码ORA-38820表示...

文档解释ORA-28262:global_context_pool_sizehasinvalidvalue.Cause:Parameterglobal_context_pool_sizehasavaluelessthantheminimumrequiredvalue(10K).Action:Pleasespecifya...

文档解释ORA-64115:XMLIndexExchangePartition:thetablehasnoXMLIndexCause:Thenon-partitionedtablehadnoXMLIndex.Action:NoneORA-64115:XMLIndexExchangePartition错误是指用户在对带有...