//布尔类型letisDone:booleanfalse;//数字类型所有数字都是浮点数numberletdecLiteral:number6;lethexLiteral:number0xf00d;letbinaryLiteral:number0b101

一、Go的源码文件Go的源码文件分类：yuanmawenjian1(https://imghelloworld.osscnbeijing.aliyuncs.com/b50e58692d24232e7d6437

1、检查一下系统中的jdk版本root@localhostsoftwarejavaversion显示：openjdkversion"1.8.0_102"OpenJDKRuntimeEnvironment(build1.8.0_102b14)OpenJDK64BitServer

1. 创建Stream实例的五种方式@Testpublicvoidtest1(){//创建Stream对象的第一种方式List<StringlistLists.newArrayList("A","B","C");Stream<S

publicclassPinYin2Abbreviation{//简体中文的编码范围从B0A1（45217）一直到F7FE（63486）privatestaticintBEGIN45217;privatestaticintEND63486;

TypicalNetwork!(https://img2018.cnblogs.com/blog/347404/201908/347404201908170940151631506710503.png)ARPSpoofing!(https://oscimg.oschina.net/oscnet/bb20c8d2198089b77f

SELECT  其他字段,  SUBSTRING\_INDEX(SUBSTRING\_INDEX(a.'逗号分隔字段',',',b.help\_topic\_id1),',',1)AS'分拆后字段' FROM  \表\ASa  JOINmysql.help\_topicAS

SpringBoot2.0.1启动用idea启动可以正常运行，但是mvn编译后启动失败报错日志如下2018041310:18:58.843mainWARNo.s.b.w.s.c.AnnotationConfigServletWebServerApplicationContextAbstractApplicationCo

主从复制       a,方式一、新增redis6380.conf,加入 slaveof192.168.1.1116379, 在6379启动完后再启6380，完成配置；       b,方式二、redisserverslaveof192.168.1.1116379  

ParallelScavenge日志格式XX:PrintGCDetails!(https://oscimg.oschina.net/oscnet/up3a7c7a71782f550660b703d6cbbe1445173.png)GC(AllocationFailure)PSYoungGe